(Gas/LPG) Rider Scrubber English EN Operator Manual · 2016. 5. 12. · 2. Before starting machine: −Check for fuel, oil, and liquid leaks. −Keep sparks and open flame away from

T20

*331481*

331481Rev. 16 (5-2016)

Rider ScrubberEnglish EN

Operator Manual

(Gas/LPG)

�

For the latest Parts manuals and otherlanguage Operator manuals, visit:

www.tennantco.com/manuals

INTRODUCTION

This manual is furnished with each new model. It provides necessary operation and maintenance instructions.

Read this manual completely and understand the machine before operating orservicing it.

This machine will provide excellent service. However, the best results will be obtained at minimum costs if:

� The machine is operated with reasonable care.

� The machine is maintained regularly - per the machine maintenance instructions provided.

� The machine is maintained with manufacturer supplied or equivalent parts.

Model No. −

Serial No. −

Installation Date −

Please fill out at time of installation

for future reference.

MACHINE DATAPROTECT THE ENVIRONMENT

Please dispose of packagingmaterials, used componentssuch as batteries and fluidsin an environmentally safeway according to local wastedisposal regulations.

Always remember to recycle.

INTENDED USEThe T20 is an industrial rider machine designed to scrub hard surfaces (concrete, asphalt, stone,synthetic, etc). Typical applications include industrial warehouses, manufacturing facilities, distributionfacilities, stadiums, arenas, convention centers, parking facilities, transportation terminals, andconstruction sites. Do not use this machine on soil, grass, artificial turf, or carpeted surfaces. Do not usewhere excessive debris is present such as leaves, paper, etc. This machine can be used both indoors andoutdoors, but ensure there is adequate ventilation if used indoors. This machine is not intended for use onpublic roadways. Do not use this machine other than described in this Operator Manual.

Tennant N.V.Industrielaan 6 5405 ABP.O. Box 6 5400 AA Uden−The [email protected]

Specifications and parts are subject to change without notice.

Original Instructions, copyright � 2006 − 2016 TENNANT Company, Printed in The Netherlands

DECLERATION OF CONFORMITY FOR MACHINERY (according to Annex II A of the Machinery Directive)

TENNANT N.V.

Industrielaan 6 5405 ABP.O. Box 6 5400 AAUden − The NetherlandsUden, 21−05−2010

EN

Herewith declares, on our own responsibility, that the machinery

T20− is in conformity with the provisions of the Machinery Directive (2006/42/EC), as amended and with national

implementing legislation− is in conformity with the provisions of the Electro Magnetic Compatibility Directive 2004/108/EC

and that− the following harmonized standards or parts of these standards have been applied: EN ISO 14121−1, EN

1037, EN 60335−1, EN 60204−1, EN ISO 13849−1, EN ISO 13849−2, EN 60529, EN ISO 4413, EN 349, EN55012, EN 61000−6−2, EN ISO 11201, EN ISO 4871, EN ISO 3744*, EN ISO 13059*, EN ISO 3450, EN60335−2−72.

− the following national standards or parts of these standards have been used:

CONTENTS

1T20 Gas/LPG 331481 (1−2015)

CONTENTS

PageIMPORTANT SAFETY INSTRUCTIONS − SAVE

THESE INSTRUCTIONS 3. . . . . . . . . . . . . . .OPERATION 7. . . . . . . . . . . . . . . . . . . . . . . . . . . .

MACHINE COMPONENTS 7. . . . . . . . . . . . .CONTROLS AND INSTRUMENTS 8. . . . . .TOUCH PANEL 9. . . . . . . . . . . . . . . . . . . . . . .SYMBOL DEFINITIONS 10. . . . . . . . . . . . . . . .OPERATION OF CONTROLS 11. . . . . . . . . .

CHARGING SYSTEM INDICATOR 11. . .ENGINE OIL PRESSURE INDICATOR 11CHECK ENGINE INDICATOR 11. . . . . . . .PARKING BRAKE INDICATOR 11. . . . . . .SETTING THE ENGINE SPEED 12. . . . .SIDE BRUSH (OPTION) 12. . . . . . . . . . . .FUEL INDICATOR 12. . . . . . . . . . . . . . . . . .GASOLINE MACHINES 12. . . . . . . . . . . . .LPG MACHINES 12. . . . . . . . . . . . . . . . . . .HOUR METER 13. . . . . . . . . . . . . . . . . . . . .SUPERVISOR CONTROL BUTTONS 13.OPERATING LIGHTS 13. . . . . . . . . . . . . . .HAZARD LIGHT (OPTION) 13. . . . . . . . . .OPERATOR SEAT 14. . . . . . . . . . . . . . . . . .SEAT BELTS 14. . . . . . . . . . . . . . . . . . . . . .STEERING COLUMN TILT KNOB 14. . . .BRAKE PEDAL 15. . . . . . . . . . . . . . . . . . . .PARKING BRAKE PEDAL 15. . . . . . . . . . .DIRECTIONAL PEDAL 15. . . . . . . . . . . . . .SQUEEGEE PROTECTORS (OPTION) 15

HOW THE MACHINE WORKS 16. . . . . . . . . .BRUSH INFORMATION 16. . . . . . . . . . . . . . . .WHILE OPERATING THE MACHINE 17. . . .PRE−OPERATION CHECKLIST 18. . . . . . . . .CHANGING THE LPG TANK 19. . . . . . . . . . .STARTING THE MACHINE 20. . . . . . . . . . . . .TURNING OFF THE MACHINE 20. . . . . . . . .FILLING THE SOLUTION TANK 21. . . . . . . .

FOAM SCRUBBING (FaST MODE) / ec−H2O SCRUBBING

(ec−H2O MODE) 21. . . . . . . . . . . . .CONVENTIONAL SCRUBBING MODE 21ES (EXTENDED SCRUB) MODE WITH

AUTO−FILL 22. . . . . . . . . . . . . . . . . . . . .ES (EXTENDED SCRUB) MODE −

MANUALLY FILLING TANKS 22. . . . . .SETTING SCRUB MODES 23. . . . . . . . . . . . .

SETTING FaST MODE 23. . . . . . . . . . . . . .SETTING ES (EXTENDED SCRUB)

MODE 23. . . . . . . . . . . . . . . . . . . . . . . . .SETTING ec−H2O MODE 23. . . . . . . . . . .SETTING BRUSH PRESSURE 23. . . . . . .SETTING SOLUTION FLOW 24. . . . . . . .CONVENTIONAL, FaST, AND ec−H2O

SOLUTION FLOW 24. . . . . . . . . . . . . . .ES (EXTENDED SCRUB) SOLUTION

FLOW 24. . . . . . . . . . . . . . . . . . . . . . . . . .SCRUBBING 25. . . . . . . . . . . . . . . . . . . . . . . . .DOUBLE SCRUBBING 26. . . . . . . . . . . . . . . . .WATER PICKUP MODE

(NO SCRUBBING) 27. . . . . . . . . . . . . . . . . .EMPTYING AND CLEANING THE DEBRIS

TRAY − CYLINDRICAL SCRUB HEADS ONLY 28. . . . . . . . . . . . . . . . . . . . . . . . . .

PageDRAINING AND CLEANING THE

RECOVERY TANK 30. . . . . . . . . . . . . . . . .DRAINING THE RECOVERY TANK

WITH THE DRAIN HOSE 30. . . . . . . . .DRAINING THE RECOVERY TANK

WITH THE DRAIN PLUG 32. . . . . . . . .DRAINING AND CLEANING THE

SOLUTION TANK 34. . . . . . . . . . . . . . . . . .FAULT INDICATOR(S) 36. . . . . . . . . . . . . . . . .CONDITIONS / WARNINGS 37. . . . . . . . . . . .OPTIONS 38. . . . . . . . . . . . . . . . . . . . . . . . . . . .

SPRAY NOZZLE (OPTION) 38. . . . . . . . . .VACUUM WAND (OPTION) 39. . . . . . . . . .POWER WAND (OPTION) 40. . . . . . . . . . .

MACHINE TROUBLESHOOTING 42. . . . . . .MAINTENANCE 44. . . . . . . . . . . . . . . . . . . . . . . . .

MAINTENANCE CHART 45. . . . . . . . . . . . . . .LUBRICATION 48. . . . . . . . . . . . . . . . . . . . . . . .

ENGINE OIL 48. . . . . . . . . . . . . . . . . . . . . . .SQUEEGEE CASTER BEARINGS 48. . .FRONT WHEEL SUPPORT BEARING 48STEERING CYLINDER BEARING 48. . . .REAR WHEEL BEARINGS 48. . . . . . . . . .TORQUE TUBES−CYLINDRICAL

BRUSHES 49. . . . . . . . . . . . . . . . . . . . . .TORQUE TUBES−DISK BRUSHES 49. . .PIVOT SHAFT−DISK BRUSHES 49. . . . .

HYDRAULICS 50. . . . . . . . . . . . . . . . . . . . . . . .HYDRAULIC FLUID 51. . . . . . . . . . . . . . . .HYDRAULIC HOSES 51. . . . . . . . . . . . . . .

ENGINE 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . .COOLING SYSTEM 52. . . . . . . . . . . . . . . .AIR FILTER 53. . . . . . . . . . . . . . . . . . . . . . . .FUEL FILTER (LPG) 53. . . . . . . . . . . . . . . .ELECTRONIC PRESSURE REGULATOR

(LPG) (For machines serial number 0044 − 0499) 54. . . . . . . . . .

LPG VAPORIZER 54. . . . . . . . . . . . . . . . . .FUEL FILTER (Gasoline) 54. . . . . . . . . . . .ENGINE BELT 55. . . . . . . . . . . . . . . . . . . . .PCV SYSTEM 55. . . . . . . . . . . . . . . . . . . . .SPARK PLUGS − GM ENGINES

(S/N 0000 − 0499) 55. . . . . . . . . . . . . . .SPARK PLUGS − MITSUBISHI ENGINES

(S/N 0500− ) 55. . . . . . . . . . . . . . . . .TIMING BELT − GM ENGINES

(S/N 0000 − 0499) 56. . . . . . . . . . . . . . .CAMSHAFT AND BALANCE SHAFT

BELTS − MITSUBISHI ENGINES (S/N 0500− ) 56. . . . . . . . . . . . . .

BATTERY 56. . . . . . . . . . . . . . . . . . . . . . . . . . . .FUSES AND RELAYS 57. . . . . . . . . . . . . . . . .

RELAY PANEL FUSES AND RELAYS 57.ENGINE HARNESS FUSES AND

RELAYS 58. . . . . . . . . . . . . . . . . . . . . . . .CIRCUIT BREAKERS (ec−H2O) 58. . . . . .

SCRUB BRUSHES AND PADS 58. . . . . . . . .DISK BRUSHES 58. . . . . . . . . . . . . . . . . . .REPLACING DISK BRUSHES OR

PAD DRIVER 59. . . . . . . . . . . . . . . . . . .

CONTENTS

T20 Gas/LPG 331481 (5−2016)2

PageREPLACING DISK PADS 60. . . . . . . . . . . .CHECKING THE DISK SCRUB HEAD

STOP BUMPERS 60. . . . . . . . . . . . . . . .CYLINDERICAL BRUSHES 61. . . . . . . . . .REPLACING OR ROTATING

CYLINDERICAL BRUSHES 61. . . . . . .CHECKING CYLINDERICAL BRUSH

PATTERN 63. . . . . . . . . . . . . . . . . . . . . .ADJUSTING THE CYLINDERICAL BRUSH

WIDTH 64. . . . . . . . . . . . . . . . . . . . . . . . .ADJUSTING THE CYLINDERICAL

BRUSH TAPER 64. . . . . . . . . . . . . . . . .SIDE BRUSH (OPTION) 65. . . . . . . . . . . . . . .

REPLACING THE SIDE BRUSH 65. . . . .FaST SYSTEM 66. . . . . . . . . . . . . . . . . . . . . . .

REPLACING THE FaST−PAK CARTON 66CLEANING THE FaST SUPPLY HOSE

CONNECTOR 67. . . . . . . . . . . . . . . . . . .CLEANING THE FaST SYSTEM

FILTER SCREEN 67. . . . . . . . . . . . . . . .CLEANING THE FaST SYSTEM AIR

PUMP FILTER (S/N 0000−0129) 67. . .REPLACING THE FaST SYSTEM

FILTERS (S/N 0130− ) 67. . . . . .ec−H2O MODULE FLUSH PROCEDURE 68CLEANING THE ec−H2O FILTER

SCREEN 69. . . . . . . . . . . . . . . . . . . . . . . . . .SQUEEGEE BLADES 70. . . . . . . . . . . . . . . . .

REPLACING (OR ROTATING) THE REAR SQUEEGEE BLADES 70. . . . . . . . . . . .

REPLACING OR ROTATING THE SIDE SQUEEGEE BLADES 72. . . . . . .

REPLACING THE SIDE BRUSH SQUEEGEE BLADE (S/N 0000−0180)

(OPTION) 73. . . . . . . . . . . . . . . . . . . .REPLACING OR ADJUSTING THE SIDE

BRUSH SQUEEGEE BLADE (S/N 0181− ) (OPTION) 74. . . . .

LEVELING THE REAR SQUEEGEE 75. .ADJUSTING THE REAR SQUEEGEE

BLADE DEFLECTION 75. . . . . . . . . . . .SKIRTS AND SEALS 76. . . . . . . . . . . . . . . . . .

SCRUB HEAD SKIRT 76. . . . . . . . . . . . . . .RECOVERY TANK SEAL 76. . . . . . . . . . . .SOLUTION TANK SEALS 76. . . . . . . . . . .

BRAKES AND TIRES 77. . . . . . . . . . . . . . . . . .BRAKES 77. . . . . . . . . . . . . . . . . . . . . . . . . .TIRES 77. . . . . . . . . . . . . . . . . . . . . . . . . . . .FRONT WHEEL 77. . . . . . . . . . . . . . . . . . . .

PROPELLING MOTOR 77. . . . . . . . . . . . . . . .PUSHING, TOWING, AND TRANSPORTING

THE MACHINE 78. . . . . . . . . . . . . . . . . . . . .PUSHING OR TOWING THE MACHINE 78TRANSPORTING THE MACHINE 78. . . .

MACHINE JACKING 80. . . . . . . . . . . . . . . . . . .STORAGE INFORMATION 81. . . . . . . . . . . . .

FREEZE PROTECTION (MACHINES WITHOUT ec−H2O SYSTEM) 81. . . . .

FREEZE PROTECTION (MACHINES WITH ec−H2O SYSTEM) 81. . . . . . . . .

PRIMING THE ec−H2O SYSTEM 83. . . .

PageSPECIFICATIONS 84. . . . . . . . . . . . . . . . . . . . . . .

GENERAL MACHINE DIMENSIONS/CAPACITIES 84. . . . . . . . .

GENERAL MACHINE PERFORMANCE 84. .HYDRAULIC SYSTEM 84. . . . . . . . . . . . . . . . .STEERING 85. . . . . . . . . . . . . . . . . . . . . . . . . . .POWER TYPE 85. . . . . . . . . . . . . . . . . . . . . . . .TIRES 86. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .FaST SYSTEM 86. . . . . . . . . . . . . . . . . . . . . . .ec−H2O SYSTEM 86. . . . . . . . . . . . . . . . . . . . .MACHINE DIMENSIONS 87. . . . . . . . . . . . . . .

SAFETY PRECAUTIONS

3T20 Gas/LPG 331481 (4−2015)

IMPORTANT SAFETY INSTRUCTIONS − SAVE THESE INSTRUCTIONS

The following precautions are used throughoutthis manual as indicated in their description:

WARNING: To warn of hazards or unsafepractices that could result in severepersonal injury or death.

CAUTION: To warn of unsafe practicesthat could result in minor or moderatepersonal injury.

FOR SAFETY: To identify actions that must befollowed for safe operation of equipment.

The following information signals potentiallydangerous conditions to the operator. Know whenthese conditions can exist. Locate all safetydevices on the machine. Report machine damageor faulty operation immediately.

WARNING: Flammable materials cancause an explosion or fire. Do not useflammable materials in tank.

WARNING: Flammable materials orreactive metals can cause an explosionor fire. Do not pickup.

WARNING: Moving belt and fan. Keepaway.

WARNING: Engine emits toxic gases.Serious injury or death can result.Provide adequate ventilation.

WARNING: Burn hazard. Hot surface. DoNOT touch.

WARNING: Machine can emit excessivenoise. Hearing loss can result. Wearhearing protection.

CAUTION: LPG engine will run for a fewseconds after key is turned off. Applyparking brake before leaving machine.

This machine may be equipped withtechnology that automatically communicatesover the cellular network. If this machine willbe operated where cell phone use is restrictedbecause of concerns related to equipmentinterference, please contact a Tennantrepresentative for information on how todisable the cellular communicationfunctionality.

FOR SAFETY:

1. Do not operate machine:− Unless trained and authorized.− Unless operator manual is read and

understood.− Under the influence of alcohol or

drugs.− While using a cell phone or other

types of electronic devices.− Unless mentally and physically

capable of following machineinstructions.

− If it is not in proper operatingcondition.

− In areas where flammablevapors/liquids or combustible dustsare present.

− In areas that are too dark to safely seethe controls or operate the machineunless operating / headlights areturned on.

− In areas with possible falling objectsunless equipped with overhead guard.

2. Before starting machine:− Check for fuel, oil, and liquid leaks.− Keep sparks and open flame away

from refueling area.− Make sure all safety devices are in

place and operate properly.− Check brakes and steering for proper

operation.

3. When starting machine:− Keep foot on brake and directional

pedal in neutral.

SAFETY PRECAUTIONS

T20 Gas/LPG 331481 (3−2013)4

4. When using machine:− Use only as described in this manual.− Do not pick up burning or smoking

debris, such as cigarettes, matches, orhot ashes.

− Use brakes to stop machine.− Go slow on inclines and slippery

surfaces.− Reduce speed when turning.− Keep all parts of body inside operator

station while machine is moving.− Use care when reversing machine.− Move machine with care when hopper

is raised.− Make sure adequate clearance is

available before raising hopper.− Do not raise hopper when machine is

on an incline.− Never allow children to play on or

around machine.− Do not carry passengers on machine.− Always follow safety and traffic rules.− Report machine damage or faulty

operation immediately.− Follow mixing, handling and disposal

instructions on chemical containers.− Follow safety guidlines concerning

wet floors.

5. Before leaving or servicing machine:− Do not park near combustible

materials, dusts, gases, or liquids.− Stop on level surface.− Set parking brake.− Turn off machine and remove key.

6. When servicing machine:− All work must be done with sufficient

lighting and visibility.− Avoid moving parts. Do not wear loose

clothing, jewelry and secure long hair.− Block machine tires before jacking

machine up.− Avoid moving parts. Do not wear loose

jackets, shirts, or sleeves.− Block machine tires before jacking

machine up.− Jack machine up at designated

locations only. Support machine withjack stands.

− Use hoist or jack that will support theweight of the machine.

− Disconnect battery connections beforeworking on machine.

− Avoid contact with battery acid.− Avoid contact with hot engine coolant.− Do not remove cap from radiator when

engine is hot.− Allow engine to cool.− Keep flames and sparks away from

fuel system service area. Keep areawell ventilated.

− Use cardboard to locate leakinghydraulic fluid under pressure.

− All repairs must be performed by atrained service mechanic.

− Do not modify the machine from itsoriginal design.

− Use Tennant supplied or approvedreplacement parts.

− Wear personal protective equipmentas needed and where recommended inthis manual.

For Safety: wear hearing protection.

For Safety: wear protective gloves.

For Safety: wear eye protection.

For Safety: wear protective dust mask.

7. When loading/unloading machineonto/off truck or trailer:− Drain tanks before loading machine.− Lower scrub head and squeegee

before tying down machine.− Turn off machine and remove key.− Use ramp, truck or trailer that will

support the weight of the machine andoperator.

− Turn off machine.− Use truck or trailer that will support

the weight of the machine.− Use winch. Do not drive the machine

onto/off the truck or trailer unless theload height is 380 mm (15 in) or lessfrom the ground.

− Set parking brake after machine isloaded.

− Block machine tires.− Tie machine down to truck or trailer.

SAFETY PRECAUTIONS

5T20 Gas/LPG 331481 (3−2013)

The following safety labels are mounted on themachine in the locations indicated. If these or anylabels become damaged or illegible, install a newlabel in its place.

10783

Located on the sideof the operatorcompartment.


Located next to the ignition switch onthe instrument panel. (LPG machinesonly)

WARNING LABEL − Machine emitstoxic gases. Serious injury or deathcan result. Provide adequateventilation.

Located on the side of the operatorcompartment.

FOR SAFETY LABEL −Read manual beforeoperating machine.

CAUTION LABEL − LPG engine willrun for a few seconds after key isturned off. Apply parking brake beforeleaving machine.

WARNING LABEL −Flammable materialsor reactive metalscan cause explosion.Do not pick up.


WARNING LABEL −Machine can emitexcessive noise. Hearingloss can result. Wearhearing protection.

SAFETY PRECAUTIONS

T20 Gas/LPG 331481 (3−2013)6

Located on enginecompartment panel.

10783

Located next to the solution tankcovers and on the detergent tank.

Located on the side of thebumper, on the exhaust shield,and on the hydraulic reservoir.

WARNING LABEL −Moving belt and fan.Stay away.

WARNING LABEL − Flammablematerials can cause explosion or fire.Do not use flammable materials in tank.

WARNING LABEL − Burn hazard. Hotsurface. Do not touch.

OPERATION

7T20 Gas/LPG 331481 (5−10)

OPERATION

MACHINE COMPONENTS

C

G

F

KB

S

A

E

D

L

R

T

I

M

U

H

N

P

V

J

O

Q

W

A. Overhead guard (option)B. Instrument panelC. Front shroudD. HeadlightsE. Side brush (option)F. Side squeegeeG. Scrub head access doorH. Debris tray carriage release leverI. Fuel tankJ. Seat shroudK. FaST carton, or ES detergent tank

compartment (option), or ec−H2O System Module compartment (option)

L. Solution tank coverM. Operator seatN. Spray wand − nozzle behind seat (option)O. Flashing light (option)P. Audible backup alarm (option)Q. Recovery tank drain hoseR. Recovery tank coverS. Solution tank drain hoseT. Debris tray carriageU. TaillightsV. Rear squeegeeW. Engine cover

OPERATION

8 T20 Gas/LPG 331481 (5−10)

CONTROLS AND INSTRUMENTS

B

I

F

EG

KA

C

D

HJ

L

A. Steering wheelB. Ignition switchC. Horn buttonD. Steering column tilt knobE. Directional pedalF. Brake pedalG. Parking brake pedalH. Touch panelI. Operating / Hazard Lights switchJ. Spray nozzle switch (option)K. Engine indicator lightsL. ec−H2O system indicator light (option)

OPERATION

9T20 Gas/LPG 331481 (5−10)

TOUCH PANEL

C

B

E

F DG

H

I

J

K

L

M

A

A. Fault indicator lightB. Hour meter / fuel indicator / fault code indicatorC. 1−STEP scrub buttonD. Scrub vacuum fan / squeegee buttonE. ES (Extended Scrub) button (option)F. FaST button (option)

ec−H2O button (option)G. Solution increase button (+)H. Solution decrease button (−)I. Brush pressure increase button (+)J. Brush pressure decrease button (−)K. Side brush button (option)L. Engine speed buttonM. Supervisor control buttons

OPERATION

10 T20 Gas/LPG 331481 (5−10)

SYMBOL DEFINITIONS

These symbols are usd on the machine to identifycontrols, displays, and features.

Hazard light Main brush pressure

Operating lights Solution flow

Spray nozzle Increase

Fault indicator Decrease

Scrub vac fan/squeegee Charging system

1−STEP scrub Engine oil pressure (0000−0170)

ES (extended scrub) Engine oil pressure (0171− )

FaST (foam scrubbing) Check engine (0000−0170)

Engine speed Horn

Side brush Jack point

Unleaded fuel only Parking Brake (0171− )

ec−H2O (option)

OPERATION

11T20 Gas/LPG 331481 (5−09)

OPERATION OF CONTROLS

CHARGING SYSTEM INDICATOR

The Charging system indicator comes on whenthe alternator is not operating within the normalrange. If this indicator comes on, stop themachine immediately and correct the problem.

ENGINE OIL PRESSURE INDICATOR

The Engine oil pressure indicator comes on whenthe engine oil pressure falls below the normaloperating pressure. If this indicator comes on,stop the machine immediately and correct theproblem.

CHECK ENGINE INDICATOR

The Check engine indicator comes on when theengine control system detects a fault duringmachine operation.

If this indicator comes on, contact a Tennantservice representative.

PARKING BRAKE INDICATOR

The parking brake indicator comes on when theparking brake is engaged.

OPERATION

12 T20 Gas/LPG 331481 (1−07)

SETTING THE ENGINE SPEED

The engine speed is controlled automaticallywhen the 1−STEP Scrub button is pressed. Whennot scrubbing, press the Engine Speed button toincrease the engine RPM for increased travelspeed. Press the Engine Speed button again toreduce the engine RPM. The two lights above thebutton indicate engine speed setting. When onelight is lit the engine is in the low setting. Whentwo lights are lit the engine is in the high setting.

SIDE BRUSH (OPTION)

The side brush allows users to scrub difficult toreach corners and areas near walls. The sidebrush also widens the scrubbing path.

With the 1−STEP Scrub button activated, pressthe Side brush button to lower and start the sidebrush. The light next to the button will come on.When finished using the side brush, press thebutton again to raise and stop the side brush. Thelight next to the button will turn off. The machinewill default to the last setting used when it ispowered on or off.

FUEL INDICATOR

GASOLINE MACHINES

For gasoline machines, the Fuel indicator displaysthe amount of fuel left in the tank. The faultindicator will flash and a low fuel message willappear when the tank is near empty.

NOTE: Do not use leaded fuels. Leaded fuels willpermanently damage the system oxygen sensorand catalytic converter.

LPG MACHINES

For LPG machines, the Fuel indicator does NOTdisplay the amount of fuel in the LPG tank. It willdisplay all the indicator bars to show that somefuel is in the tank. When the LPG tank is nearempty, the fault indicator will flash and a low fuelmessage will appear.

The LPG fuel gauge on the tank displays theamount of fuel in the LPG tank.

OPERATION

13T20 Gas/LPG 331481 (1−07)

HOUR METER

The Hour meter records the hours the machinewas operated. Use this information to determinemachine service intervals.

SUPERVISOR CONTROL BUTTONS

The Supervisor Control buttons are for accessingthe configuration and diagnostic modes. Onlyproperly trained service personnel and TENNANTrepresentatives should access these modes.

OPERATING LIGHTS

Push the top of the Operating / hazard light switchto turn on the headlights and taillights. Return thelight switch to the center position to turn off thelights.

HAZARD LIGHT (OPTION)

Press the bottom of the Operating / hazard lightswitch to turn on the hazard light, headlights, andtaillights. Return the light switch to the centerposition to turn off the lights.

OPERATION

14 T20 Gas/LPG 331481 (1−07)

OPERATOR SEAT

The operator seat has three adjustments:backrest angle, operator weight, and front to back.

The backrest adjustment knob adjusts the angleof the backrest.

Increase angle: Turn the angle adjustment knobcounterclockwise.

Decrease angle: Turn the angle adjustment knobclockwise.

The weight adjustment knob controls the firmnessof the operator seat.

Increase firmness: Turn the weight adjustmentknob clockwise.

Decrease firmness: Turn the weight adjustmentknob counterclockwise.

Use the gauge next to the weight adjustment knobto help determine seat firmness for the operator.

The front−to−back adjustment lever adjusts theseat position.

Adjust: Pull the lever out and slide the seat to thedesired position. Release the lever to lock theseat into place.

SEAT BELTS

Always fasten and adjust the seat belts beforeoperating the machine.

STEERING COLUMN TILT KNOB

1. Pull the Steering column tilt knob and adjustthe steering column to the desired height.

2. Release the Steering column tilt handle.

OPERATION

15T20 Gas/LPG 331481 (1−07)

BRAKE PEDAL

Press the Brake pedal to stop the machine.

PARKING BRAKE PEDAL

Press the Brake pedal down as far as possibleand use toe to lock the Parking brake pedal intoplace. Press the Brake pedal to release theparking brake. The Parking brake pedal will returnto the unlocked position.

DIRECTIONAL PEDAL

Press the top of the Directional pedal to moveforward and the bottom of the pedal to movebackward. The backup lights will come on whenthe machine is in reverse. The pedal returns to theneutral position when it is released.

NOTE: An audible alarm will sound and thebackup light will flash when backing the machine ifequipped with the optional backup alarm.

SQUEEGEE PROTECTORS (OPTION)

The rear and side squeegee protectors helpprotect the rear squeegee from being damaged.

To engage the rear squeegee protector, pull thepin, lower the protector bar, and reinsert the pin.

OPERATION

16 T20 Gas/LPG 331481 (5−2016)

HOW THE MACHINE WORKS

This machine can effectively scrub dirty floors.The 1−STEP Scrub button makes it possible toimmediately begin scrubbing by operating all thescrubbing functions.

When in the conventional Scrub mode, a waterand detergent mixture is used to scrub the floor.

When in the optional FaST (Foam scrubbing)mode, the FaST scrubbing system mixes theFaST−PAK concentrate with a small amount ofwater, creating a large volume of expanded wetfoam. The FaST system can be used with allscrubbing applications.

When in the optional ES (Extended Scrub) mode,the dirty solution in the recovery tank is filteredthrough the ES system and returned to thesolution tank for reuse. Detergent is then injectedinto the returned solution to revitalize the cleaningcapability of the solution.

When in the optional ec−H2O (electricallyconverted water) mode, normal water passesthrough a module where it is oxygenated andcharged with an electric current. The electricallyconverted water changes into a blended acidicand alkaline solution forming a neutral pH cleaner.The converted water attacks the dirt, breaks it intosmaller particles, and pulls it off the floor surfaceallowing the machine to easily scrub away thesuspended soil. The converted water then returnsto normal water in the recovery tank. The ec−H2Osystem can be used while double scrubbing.

BRUSH INFORMATION

For best results, use the correct brush type for thecleaning application. Listed below are the brushesand the applications for which each is best suited.

NOTE: The amount and type of soilage play animportant role in determining the type of brushesto use. Contact a Tennant representative forspecific recommendations.

Nylon brush (Disk)* − Softer nylon bristles arerecommended for scrubbing coated floors. Cleanswithout scuffing.

Polyester brush (Cylinderical) − Softer generalpurpose polyester bristles gently clean whilescrubbing. Perfect for sensitive floor surfaces.Polyester does not absorb water so it is preferredover Nylon in wet applications.

PolyPro brush (Cylinderical) − Heavy dutypolypropylene bristles provide a more aggressivecleaning performance and can more easily liftcompacted dirt, debris, and sand while offeringexcellent scrubbing performance.

Polypropylene brush (Cylinderical and Disk)*− General purpose polypropylene bristles lift lightlycompacted dirt without scuffing high-gloss coatedfloors.

Super AB brush (Cylinderical and Disk)* −Nylon fiber impregnated with abrasive grit toremove stains and compacted dirt. Aggressiveaction on any surface. Performs well on buildup,grease, or tire marks.

* This brush is also available for the side brush.

Stripping pad − This brown pad is for strippingfloors. Quickly and easily cuts through old finish toprepare the floor for recoating.

Scrubbing pad − This blue pad is for scrubbingfloors. Removes dirt, spills, and scuffs. Leaves aclean surface ready for re-coating.

Buffing pad − This red pad is for buffing floors.Quickly cleans and removes scuff marks whilepolishing the floor to a high gloss.

Polishing pad − This white pad is for polishingfloors. Maintains a high gloss. Use for buffing verysoft finishes and lower traffic areas, and polishingsoft waxes on wood floors.

OPERATION

17T20 Gas/LPG 331481 (2−2016)

High productivity pad − This black pad is foraggressively stripping floor finishes/sealers or forvery heavy−duty scrubbing. This pad can only beused with the grip pad driver, not the tufted paddriver.

Surface preparation pad − This maroon pad isfor very aggressive floor stripping withoutchemicals.

Grip pad driver − The grip−face backing allowspads to be fully used and holds pads in placewithout penetrating the pad. The spring−activatedcentering device works with all Tennant pads andallows for fast, easy pad replacement.

Tufted pad driver − Standard pad driver hasshort bristles, or “tufts,” on the back to hold thepad in place. This driver works with all Tennantpads except the black high productivity pad.

WHILE OPERATING THE MACHINE

Pick up oversized debris before scrubbing. Pickup wire, string, twine, plastic wrap, large pieces ofwood, or any other debris that could becomewrapped around or tangled in the brushes. Do notuse where excessive debris is present such asleaves, paper, etc.

Drive as straight a path as possible. Avoidbumping into posts or scraping the sides of themachine. Overlap the scrub/sweep paths byseveral centimeters (a few inches).

Avoid turning the steering wheel too sharply whenthe machine is in motion. The machine is veryresponsive to the movement of the steering wheel.Avoid sudden turns, except in emergencies.

Adjust the machine speed, brush pressure, andsolution flow as required when scrubbing. Use thelowest brush pressure and solution flow settingsfor best performance. If the machine is equippedwith the FaST or ec−H20 system, use the FaSTor ec−H20 system for the best scrubbing results.

Keep the machine moving to prevent damagingfloor finishes.

If poor cleaning performance is observed, stopcleaning and refer to MACHINETROUBLESHOOTING in this manual.

Perform the Daily Maintenance Procedures aftereach use (see MACHINE MAINTENANCE in thismanual).

Drive the machine slowly on inclines. Use thebrake pedal to control machine speed ondescending inclines. Scrub with the machine upinclines rather than down inclines.

FOR SAFETY: When using machine, go slowlyon inclines and slippery surfaces.

Do not operate machine in areas where theambient temperature is above 43� C (110� F). Donot operate scrubbing functions in areas wherethe ambient temperature is below freezing 0� C(32� F).

The maximum rated incline for scrubbing with themachine is 14%. The maximum rated inclineduring transport of the machine is 18%.

OPERATION

18 T20 Gas/LPG 331481 (3−2013)

PRE−OPERATION CHECKLIST

� Check the hydraulic fluid level.

� Check the fuel level.

� Check the machine for fluid leaks.

� Check the condition of the main brushes.Remove string, banding, plastic wrap, or otherdebris wrapped around the brushes.

� Cylinderical brushes: Check that the debristray is empty and clean.

� Check the main brush compartment rightskirts, seals, and squeegee for damage andwear.

� Side Brush Option: Check the condition of thebrush. Remove string, banding, plastic wrap,or other debris wrapped around the brush.

� Side Brush Option: Check the condition of theside brush squeegee.

� Check the radiator and hydraulic cooler finsfor debris.

� Check the engine coolant level.

� Check the engine oil level.

� Check the main brush compartment left skirts,seals, and squeegee for damage and wear.

� Check the left solution tank cover seal fordamage and wear.

� Check the recovery tank cover seal fordamage and wear.

� Clean the vacuum fan debris filter.

� Drain and clean the recovery tank.

� ES Option: Drain and clean the solution tank,float sensor, and ES filter.

� Check the right solution tank cover seal fordamage and wear.

� Clean the hopper and the debris screen.

� Check the squeegee hose for debris orblockage.

� Check the squeegees for damage, wear, anddeflection adjustment.

� FaST Scrubbing: Check the FaST−PAKconcentrate agent level. Replace carton asneeded. See the INSTALLING THEFaST−PAK CARTON section of the manual.

� FaST Scrubbing: Ensure all conventionalcleaning agents are drained and rinsed fromthe solution tank.

� FaST Scrubbing: Ensure the solution tank isfilled with clear cool water only.

� Check the horn, headlights, taillights, safetylights, and backup alarm (if equipped).

� Check the brakes and steering for properoperation.

� Check the service records to determinemaintenance requirements.

OPERATION

19T20 Gas/LPG 331481 (3−2013)

CHANGING THE LPG TANK

FOR SAFETY: Before leaving or servicingmachine, stop on level surface, set parkingbrake, turn off machine, and remove key.

1. Open the side access door.

2. Close the LPG tank service valve.

3. Start the machine and operate the engine untilit stops from lack of fuel. Turn off themachine.

4. Lift the operator seat open and engage theseat latch so the seat remains open.

FOR SAFETY: When servicing machine, keepflames and sparks away from fuel systemservice area. Keep area well ventilated.

5. Put on gloves and remove the quickdisconnect tank coupling.

6. Disengage the mounting strap and removethe empty LPG fuel tank.

7. Align the hole in the tank collar with thecentering pin and carefully place the full LPGtank onto the tray. Secure the tank withmounting strap.

8. Connect the LPG fuel line to the tank servicecoupling. Make sure the tank service couplingis clean and undamaged and that it matchesthe fuel line coupling.

9. Slowly open the tank service valve and checkfor leaks. If a leak is found, immediately closethe service valve and inform the appropriatepersonnel.

OPERATION

20 T20 Gas/LPG 331481 (3−2013)

STARTING THE MACHINE

1. LPG powered machines: Slowly open theliquid service valve.

NOTE: Opening the service valve too quickly maycause the service check valve to stop the flow ofLPG fuel. If the check valve stops the fuel flow,close the service valve, wait a few seconds, andslowly open the valve again.

2. Sit in the operator seat and press the brakepedal or set the parking brake.

FOR SAFETY: When starting machine, keepfoot on brake and directional pedal in neutral.

3. Turn the ignition switch key until the enginestarts.

NOTE: Do not operate the starter motor for morethan 10 seconds at a time or after the engine hasstarted. Allow the starter to cool 15−20 secondsbetween starting attempts or damage to thestarter motor may occur.

4. Allow the engine and hydraulic system towarm up for three to five minutes.

WARNING: Engine emits toxic gases.Severe respiratory damage orasphyxiation can result. Provideadequate ventilation. Consult with yourregulatory authorities for exposurelimits. Keep engine properly tuned.

5. Turn on lights.

TURNING OFF THE MACHINE

1. Stop the machine and turn off all scrubbingfunctions.

2. Turn the ignition switch key counter clockwiseto turn off the machine. Remain in theoperator seat until the engine is off.

CAUTION: LPG engine will run for a fewseconds after key is turned off. Applyparking brake before leaving machine.

NOTE: To protect engine emission componentson LPG powered machines, the engine willcontinue to operate for a few seconds after theignition switch is turned off.

FOR SAFETY: Before leaving or servicingmachine, do not park near combustiblematerials, dust, gases, or liquids. Stop onlevel surface, set parking brake, turn offmachine, and remove key.

OPERATION

21T20 Gas/LPG 331481 (3−2013)

FILLING THE SOLUTION TANK

FOAM SCRUBBING (FaST MODE) / ec−H2OSCRUBBING (ec−H2O MODE)


1. Open either the left or right solution tank fillcover.

2. Fill the solution tank with only clean COOLWATER (less than 21°C / 70°F). DO NOT usehot water or add any conventional floorcleaning detergents or FaST system failuremay result.

WARNING: Flammable materials cancause an explosion or fire. Do not useflammable materials in tank(s).

NOTE: To install or change the FaST−PAK carton,see the REPLACING THE FaST−PAK CARTONsection of the manual.

NOTE: Do not use the FaST or ec−H2O systemwhen there are conventional cleaning detergentsin the solution tank. Drain, rinse, and refill thesolution tank with clear cool water beforeoperating the FaST or ec−H2O system.Conventional cleaning detergents may cause aFaST or ec−H2O system failure.

CONVENTIONAL SCRUBBING MODE


1. Open either the left or right solution tank fillcover.

2. Partially fill solution tank with water (not toexceed 60°C / 140°F). Pour the requiredamount of detergent into the solution tank. Fillthe solution tank with water until the level isjust below the indicator tab.


ATTENTION: For Conventional Scrubbing,only use recommended cleaning detergents.Machine damage due to improper detergentusage will void the manufacturer’s warranty.

NOTE: Pour a recommended foam controlsolution into the recovery tank if excessive foamappears. For specific detergent recommendations,contact a TENNANT representative.

OPERATION

22 T20 Gas/LPG 331481 (3−2013)

ES (EXTENDED SCRUB) MODE WITHAUTO−FILL

FOR SAFETY: Before leaving or servicingmachine, stop on level surface, set parkingbrake, and turn off machine.

1. Connect the hose from the water source (notto exceed 60°C / 140°F) to the auto−fillconnection.

2. Turn the ignition switch to the on position(without starting) and turn on the watersource. The auto−fill automatically fills thetanks to the proper level.

3. Fill the detergent tank with the properdetergent.

ATTENTION: For ES Scrubbing, only userecommended low−foaming cleaningdetergents. Machine damage due to the use ofimproper detergent will void themanufacturer’s warranty.

ES (EXTENDED SCRUB) MODE − MANUALLYFILLING TANKS


1. Open either the left or right solution tankcover and fill the solution tank with water (notto exceed 60°C / 140°F) until the level is justbelow the indicator tab.

2. Open the recovery tank cover and fill therecovery tank with water (not to exceed 60°C /140°F) until the recovery tank isapproximately half full.


OPERATION

23T20 Gas/LPG 331481 (5−10)

SETTING SCRUB MODES

Before scrubbing, determine which scrub modewill be used (FaST, ES or conventional). Then setthe scrub brush pressure and adjust the solutionflow levels.

SETTING FaST MODE

The FaST button enables the FaST system tocome on when the 1−STEP Scrub button isactivated. The light next to the button will comeon. The machine will default to the last settingused when it is powered on or off.

SETTING ES (EXTENDED SCRUB) MODE

The ES button enables the ES system to come onwhen the 1−STEP Scrub button is activated. Thelight next to the button will come on. The machinewill default to the last setting used when it ispowered on or off.

NOTE: When the ES system is turned on there isa slight delay before the ES pump beginsoperating.

SETTING ec−H2O MODE

The ec−H2O button enables the ec−H2O systemto come on when the 1−STEP Scrub button isactivated. The light next to the button will comeon. The machine will default to the last settingused when it is powered on or off.

NOTE: Storage or transporting machinesequipped with ec−H2O in freezing temperaturesrequires special procedures. Follow the freezeprotection procedure located in the STORAGEINFORMATION section.

SETTING BRUSH PRESSURE

Under normal cleaning conditions, the brushpressure should be set to the minimum setting(the bottom light). Under heavy grime conditions,the brush pressure can be set to a higher setting.Travel speed and floor conditions will affectcleaning performance.

With the 1−STEP Scrub button activated, presseither the Brush Pressure increase button (+) orthe Brush Pressure decrease button (−) to set thebrush pressure for the surface being cleaned. Ifbrushes are worn, it may be necessary toincrease the brush pressure. The machine willdefault to the last setting used when it is poweredon or off.

OPERATION

24 T20 Gas/LPG 331481 (5−10)

SETTING SOLUTION FLOW

With the 1−STEP Scrub button activated, presseither Solution increase button (+) or Solutiondecrease button (−) to set the solution flow level.Travel speed and floor conditions will affectscrubbing performance. The machine will defaultto the last setting used when the machine ispowered on or off.

NOTE: In the ES and FaST modes, the solutionflow buttons control both the solution ANDdetergent flow levels.

To turn off all solution and detergent flow, pressthe Solution decrease button (−) until all indicatorlights are off.

CONVENTIONAL, FaST, AND ec−H2OSOLUTION FLOW

Under normal soilage conditions the solution flowlevel should be set to the lowest setting (thebottom light). Under heavy grime conditions, thesolution flow level should be set to the highersettings (middle or top lights).

ES (EXTENDED SCRUB) SOLUTION FLOW

For ES machines, the detergent flow is turnedoff when the solution flow is in the lowestsetting (one light). Under normal soilageconditions, the solution flow level should bealternated between the middle and lowest setting.The middle setting (two lights) allows solutionAND detergent flow. The lowest setting (one light)allows solution flow WITHOUT adding detergent.Detergent does not have to be continuously addedwith the solution flow to attain effective scrubbingresults.

OPERATION

25T20 Gas/LPG 331481 (5−10)

SCRUBBING

The 1−STEP Scrub button operates all thescrubbing functions.

FOR SAFETY: Do not operate machine, unlessoperator manual is read and understood.

1. Start the machine.

NOTE: Make sure the scrub modes / settings areset before scrubbing.

2. Press the 1−STEP Scrub button. The light onthe button will come on. All the presetscrubbing functions will turn on.

NOTE: DO NOT turn on the FaST or ec−H2Osystem during conventional scrubbing.Conventional cleaning detergents could cause aFaST or ec−H2O system failure. Drain, rinse, andrefill the solution tank with cool clean water beforeoperating the FaST or ec−H2O system.

3. Release the parking brake, then press theDirectional pedal to begin scrubbing.

WARNING: Flammable materials orreactive metals can cause an explosionor fire. Do not pick up.

FOR SAFETY: When using machine, go slowon inclines and slippery surfaces.

NOTE: The squeegee automatically rises whenthe machine is driven backwards. This preventsdamaging the squeegee.

NOTE:The ec−H2O system indicator light will notturn on until the machine starts scrubbing.

ec−H2O Model: If an alarm sounds and theec−H2O system indicator light begins to blink red,the ec−H2O module must be flushed to resumeec−H2O operation (See ec−H2O MODULEFLUSH PROCEDURE).

NOTE: When the alarm sounds and the lightblinks red, the machine will bypass the ec−H2Osystem. To continue scrubbing, press the ec−H2Obutton to turn off the ec−H2O system.

ATTENTION: (ec−H2O model) Do not allowsolution tank to run dry. ec−H2O modulefailure may result if operated without water foran extended period.

ec−H2O SYSTEMINDICATOR LIGHTCODE

CONDITION

Solid green Normal operation

Blinking red Flush ec−H2O module

Solid red Contact Service Center

4. Release the directional pedal and press thebrake pedal to stop the machine.

5. Press the 1−STEP Scrub button to stopscrubbing. The light next to the button will gooff and scrubbing functions will stop after ashort delay.

OPERATION

26 T20 Gas/LPG 331481 (1−10)

DOUBLE SCRUBBING

For heavily soiled areas, use the double scrubbingmethod.

Side brush option (S/N 0000−0180): Beforedouble scrubbing, manually lock the side brushsqueegee into the raised position. Pull the pinfrom the side brush squeegee bracket, manuallyraise the side squeegee to the upper position,then reinsert the brush pin.

Side brush option (S/N 0181− ): Before doublescrubbing, remove the side brush bumper. Pull thepins and remove the squeegee bumper.

Press the 1−STEP Scrub button, and then theScrub vacuum fan/squeegee button. The lightabove the Scrub vacuum fan/squeegee button willturn off, the squeegee will rise, and the vacuumfan will stop operating. Scrub the heavily soiledarea.

FOR SAFETY: When using machine, go slowon inclines and slippery surfaces.

Let the cleaning solution soak on the floor for5−15 minutes. Then place the side squeegee intothe lower position and lock into place with the pin.

Press the Scrub vacuum fan/squeegee buttonagain to lower the squeegee and turn on thevacuum fan. The light above the button will comeon. Scrub the floor a second time to pick up thecleaning solution.


NOTE: To turn off the solution flow whenscrubbing the area a second time, repeatedlypress the Solution decrease button (−) until alllights above the button are off.

NOTE: Double scrubbing is not recommended inareas where the cleaning solution will run underracks or damage products.

OPERATION

27T20 Gas/LPG 331481 (1−07)

WATER PICKUP MODE (NO SCRUBBING)

The machine can be used to pick up water ornon−flammable liquid spills without scrubbing.

To pick up water or non−flammable liquid spills,make sure the 1−STEP Scrub button is notactivated. The light next to the button must be off.


Press the Scrub vacuum fan/squeegee button.The light above the button will come on, thesqueegee will lower, and the vacuum fan will startoperating. Pick up the water or non−flammableliquid spill.

OPERATION

28 T20 Gas/LPG 331481 (5−2013)

EMPTYING AND CLEANING THE DEBRISTRAY − CYLINDRICAL SCRUB HEADS ONLY

1. Drive the machine to a debris dump site.


2. Press the debris tray carriage release lever.

3. Pull the debris tray carriage open.

4. Pull the debris tray from the carriage.

5. Empty the contents from the debris tray.

6. Remove the debris screen from the debristray.

7. Rinse the debris screen and the debris tray.

OPERATION

29T20 Gas/LPG 331481 (1−07)

8. Disconnect the vacuum hose from the rearcoupling.

9. Spray water through the port located insidethe vacuum coupling to rinse debris from thedebris tray coupling.

10. Reconnect the vacuum hose to the rearcoupling.

11. Reinstall the debris screen into the debris tray.

12. Align the debris tray with the debris traycarriage, use the handle to guide the debristray into the debris tray carriage, and slide thehandle back into the debris tray.

13. Lift slightly on the debris tray carriage handleand push the debris tray carriage closed untilit locks shut.

OPERATION

30 T20 Gas/LPG 331481 (3−2013)

DRAINING AND CLEANING THE RECOVERYTANK

Drain and clean the recovery tank daily or whenthe recovery tank full indicator comes on.

Clean the outside of the recovery tank with vinylcleaner.


DRAINING THE RECOVERY TANK WITH THEDRAIN HOSE

1. Lift the recovery tank cover.

2. Place the recovery tank drain hose nozzlenext to a floor drain.

3. Open the recovery tank Variable Drain Valve.

4. Rinse dirt and debris down through the drainhole in the demister tray and flush the vacuumhose.

NOTE: DO NOT use steam to clean tanks.Excessive heat can damage tanks andcomponents.

5. Remove the vacuum screen from therecovery tank and rinse the screen.

OPERATION

31T20 Gas/LPG 331481 (1−07)

6. Rinse the float sensor.

7. ES machines: Rinse the ES filter. Ifnecessary, remove the ES filter from therecovery tank.

8. Rinse dirt and debris towards the recoverytank drain. Allow the recovery tank to drain.

9. Close the recovery tank Variable Drain Valve.

10. Reinstall the recovery tank drain hose ontothe back of the recovery tank and close therecovery tank cover.

OPERATION

32 T20 Gas/LPG 331481 (3−2013)

DRAINING THE RECOVERY TANK WITH THEDRAIN PLUG

Use the drain plug to drain the recovery tank if thetank is draining slowly or if the drain hose isplugged.

1. Park the machine so the larger drain in therecovery tank is positioned over the disposaldrain. Set the parking brake.


2. Machines equipped with cylindrical scrubheads only: To avoid water and debris fromgetting in the debris tray, open the debriscarriage and remove the debris tray.

3. Lift the drain plug handle and remove thedrain plug from the tank.

4. Open the recovery tank Variable Drain Valve.

5. Remove the recovery tank drain hose fromthe back of the recovery tank, then rinse thedirt and debris from the hose into the tank.

6. Rinse dirt and debris out the open drain.

OPERATION

33T20 Gas/LPG 331481 (3−2013)

7. Clean the drain hole, then reinsert the drainplug. Push the handle down to tighten. Besure the drain plug is fully seated beforetightening.

NOTE: If necessary, turn the handle clockwise fora tighter fit and counterclockwise for a looser fit.

8. Close the recovery tank Variable Drain Valve.

9. Reinstall the recovery tank drain hose ontothe back of the recovery tank.

10. Machines equipped with cylindrical scrubheads only: Reinstall the debris tray into thedebris tray carriage and close the carriage.

11. Close the recovery tank cover.

OPERATION

34 T20 Gas/LPG 331481 (3−2013)

DRAINING AND CLEANING THE SOLUTIONTANK

The solution tank on non−ES machines does notrequire regular maintenance. If deposits form onthe bottom of the tank, rinse the tank with a strongblast of warm water.

The solution tank on machines with the ES optionshould be drained and cleaned daily.

Clean the outside of the solution tank with vinylcleaner.


1. Open the solution tank cover(s).

2. Place the solution tank drain hose nozzle nextto a floor drain.

3. Open the solution tank Variable Drain Valve.

4. Rinse the solution tank. Flush dirt and debristoward the solution tank drain.

5. Rinse the float sensor and the screen filter.Allow the solution tank to drain.

OPERATION

35T20 Gas/LPG 331481 (1−07)

6. Close the solution tank Variable Drain Valve.

7. Reinstall the solution tank drain hose onto theback of the recovery tank.

8. Close the solution tank cover(s).

OPERATION

36 T20 Gas/LPG 331481 (3−2013)

FAULT INDICATOR(S)

This machine is equipped with two visualindicators, a red indicator light and an LCD (liquidcrystal display).

The red indicator light will blink continuouslyindicating that a fault has occurred.

The LCD will display a fault code. If there is morethan one fault, each fault will alternately display.

All faults are also accompanied by an audiblealarm to alert the operator a fault has occurred.

To reset the fault indicators, turn the machine off,then eliminate the cause of the fault. The faultindicator will reset when the machine is restarted.

Refer to the table below to determine the causeand remedy for the fault.

Fault Code(Displayed in LCD)

Cause(s) Result Remedy

F3: Clogged Hyd Hydraulic filter is clogged − Replace hydraulic filter.F6: Sol. Tank E. Solution tank is empty − Fill solution tank.F7: Rec. Tank Full Recovery tank is full Terminates scrubbing

functionsPress the Scrub vacuumfan/squeegee button for oneminute of extended waterpickup. Empty recoverytank.ES models: activate the ESsystem to prevent this.

F8: High Eng Temp *GM engine (S/N0000−0499)

Engine temperature is high − Shut off machine.Contact TENNANT servicerepresentative.

F9: High Hyd Temp Hydraulic fluid temperatureis high

− Shut off machine.Contact TENNANT servicerepresentative.

F10: Low Fuel Low fuel − Fill fuel tank (gasoline).Replace fuel tank (LPG)

F11: Open Scb Vac(Optional)

Scrub vacuum hose is notconnected

− Connect vacuum hose tosqueegee assembly.

F12: Seat Sw Open Operator not in the seatwhile engine is running andparking brake not engaged

Engine will shut off Engage parking brakebefore leaving the machine.

*NOTE: Mitsubishi engines machine serial number 0500 and above will display a “check engine” indicatorand will automatically shut the machine off if the coolant is too hot.

OPERATION

37T20 Gas/LPG 331481 (1−07)

CONDITIONS / WARNINGS

Condition codes are typically caused by theoperator attempting to activate modes that areunavailable. The code will appear in the LCD.

Refer to the table below to determine the cause ofthe condition.

Condition Code(Displayed in LCD)

Condition(s) Description

C2: No Sweep Vac Sweep vacuum unavailable Sweep vacuum not available when1−STEP scrub system is active.

C3: No FaST Mode FaST mode unavailable Only machines equipped with FaST systemcan be operated in FaST mode.

C4: No ES Mode ES mode unavailable Only machines equipped with ES systemcan be operated in ES mode.

C5: No ES/FaST ES and FaST systems unavailable Only machines equipped with ES or FaSTsystem can be operated in these modes.

C6: No Side Sweep Side sweep unavailable Side sweep not allowed to operate by itself.

OPERATION

38 T20 Gas/LPG 331481 (3−2013)

OPTIONS

SPRAY NOZZLE (OPTION)

The spray nozzle is used to clean the machineand surrounding areas. The solution tank providesa water/solution supply for the spray nozzle. Awand is included with the spray nozzle.

NOTE: Do NOT get water on electroniccomponents when using the spray nozzle to cleanthe machine.


1. Turn the key to the on position (withoutstarting the machine).

NOTE: The spray nozzle can be operated whilethe engine is running, but it is recommended toturn the engine off while using the spray nozzle.

2. Press the top of the Spray nozzle switch toturn on the water supply. The light on theswitch will come on when the spray nozzle isactivated.

3. Remove the spray nozzle from the storagearea and clean as required.

FOR SAFETY: When using pressurized air orwater, wear eye protection.

4. If cleaning a hard to reach area, install thewand onto the spray nozzle.

5. Twist the off/on knob to turn on the wand.

6. When finished cleaning, place the spraynozzle and wand back into their storagelocations.

7. Press the bottom of the Spray nozzle switchto turn off the water supply.

OPERATION

39T20 Gas/LPG 331481 (1−2015)

VACUUM WAND (OPTION)

FOR SAFETY: Before leaving or servicingmachine, stop on level surface, set parkingbrake, turn off machine and remove key.

1. Remove the vacuum wand sections and hosefrom the storage bag located on top therecovery tank cover.

2. Disconnect the vacuum hose from the rearcoupling and attach the wand hose.

3. Assemble the wand and nozzle.



5. Verify that the 1−STEP Scrub button is off.The light next to the button will be off.

6. Press the Scrub vacuum fan/squeegeebutton. The light above the button will turn onand the vacuum fan will start operating.

NOTE: The squeegee will lower.

7. Clean the spill or debris.

8. When finished vacuuming, press the Scrubvacuum fan/squeegee button to turn off thevacuum. The light above the button will turnoff.

9. Turn off the machine.

10. Disassemble the vacuum wand sections andhose and return them to the storage bag.

11. Reattach the vacuum hose to the rearcoupling.

OPERATION

40 T20 Gas/LPG 331481 (1−07)

POWER WAND (OPTION)

The power wand uses both the vacuum andsolution systems. The power wand allows the userto scrub floors that are out of reach of themachine.


1. Remove the power wand equipment from thestorage bag on top the recovery tank cover.

2. Remove the squeegee suction hose from thetop of the rear squeegee assembly.

3. Connect the vacuum wand hose and thesqueegee vacuum hose with the adapter.

4. Attach the solution hose to thequick−disconnect fitting. Push the connectorin until it stops. Pull on the hose to ensure it isconnected.

5. Attach the other ends of the solution andvacuum hoses to the power wand.



7. Verify that the 1−STEP Scrub button is off.The light next to the button will be off.

8. Press the Scrub vacuum fan/squeegeebutton. The light above the button will turn onand the vacuum fan will start operating.

NOTE: The squeegee will also lower.

OPERATION

41T20 Gas/LPG 331481 (1−07)

9. Press the top of the Spray nozzle switch toturn on the water supply.

10. Squeeze the solution lever on the power wandto spray solution onto the floor. Scrub the floorwith the brush side of the cleaning tool.

11. Vacuum up the solution by turning over thecleaning tool so the squeegee side is down.

If the cleaning tool is hard to push or is notpicking up the solution very well, adjust theroller wheels on the tool by turning the blackadjustment knob.

NOTE: The wheels are properly adjusted whenthe squeegee blade deflects slightly while thecleaning tool is pushed back and forth.

12. When finished scrubbing, press the Scrubvacuum fan/squeegee button to turn off thevacuum and press the bottom of the Spraynozzle switch to turn off the water supply.

13. Turn off the machine.

14. Disconnect the power wand vacuum hosefrom the squeegee suction hose and thesolution hose from the quick−disconnectfitting.

15. Reconnect the vacuum hose to the rearsqueegee assembly.

16. Disassemble the power wand assembly andreturn it to the storage bag.

OPERATION

42 T20 Gas/LPG 331481 (5−08)

MACHINE TROUBLESHOOTING

Problem Cause Remedy

Trailing water−poor or nowater pickup

Scrub vacuum fan turned off Turn on vacuum fan

Worn squeegee blades Rotate or replace squeegee blades

Squeegee out of adjustment Adjust squeegee

No detergent in solution tankcausing squeegee to chatter

Add detergent to solution tank

Vacuum hose clogged Flush vacuum hoses

Vacuum screen dirty Clean vacuum screen

Recovery tank cover seals worn Replace seals

Debris caught in squeegee Remove debris

Vacuum hose to squeegee orrecovery tank disconnected ordamaged

Reconnect or replace vacuum hose

Recovery tank cover notcompletely closed

Check for obstructions and makesure cover is closed properly

Scrub vacuum fan will notturn on

Vacuum fan / squeegee buttonturned off

Turn on Vacuum fan / squeegeebutton

Recovery tank full Drain recovery tank

Foam filling recovery tank Empty recovery tank

Use less detergent/or usedefoamer

Recovery tank sensor dirty or stuck Clean or replace sensor

Little or no solution flow tothe floor (ConventionalScrubbing Mode)

Solution tank empty Fill solution tank

Solution flow turned off Turn on solution flow

Solution supply lines plugged Flush solution supply lines

Excessive dusting Brush skirts and dust seals worn,damaged, or out of adjustment

Replace or adjust brush skirts and/or brush seals

Hopper dust filter clogged Shake and/or replace dust filter

Sweep vacuum fan seal damaged Replace vacuum fan seal

Sweep vacuum fan failure Call Tennant service representative

Thermo−Sentry tripped Allow Therm−Sentry to cool

Poor sweeping performance Worn brush bristles Replace brushes

Brush pressure set too light Increase brush pressure

Main brushes not properly adjusted Adjust brushes

Debris caught in main brush drivemechanism

Remove debris from main brushdrive mechanism

Main and/or side brush drive failure Call Tennant service representative

Hopper is full Empty hopper

Hopper lip skirts worn or damaged Replace lip skirts

Improper main brushes Call Tennant service representative

OPERATION

43T20 Gas/LPG 331481 (10−10)

Problem Cause Remedy

Poor scrubbing performance 1−STEP Scrub button not on Turn on 1−STEP Scrub button

Improper detergent or brushes Call Tennant service representative

Solution tank empty Fill solution tank

Debris caught on main brushes Remove debris

Worn main brushes Replace brushes

Brush pressure set too light Increase brush pressure

FaST System does notoperate

FaST button is turned off Turn on the FaST button

Clogged FaST−PAK supply hoseand/or connector

Soak connector and hose in warmwater and clean

FaST−PAK carton is empty or notconnected

Replace FaST−PAK carton and/orconnect supply hose

FaST system is not primed To prime, operate the FaSTsolution system for a few minutes

Clogged filter screen Drain solution tank, remove andclean filter screen

Blown fuse Call Tennant service representative

Faulty solution pump Call Tennant service representative

ES System does not operate ES button is turned off Turn on ES button

ES sensor in tank dirty Clean sensor

Clogged ES pump filter Clean ES filter

Water level in recovery tank toolow

Fill recovery tank about half full

Water level in solution tank too low Fill solution tank

ec−H2O Model:ec−H2O system indicatorlight blinks red and the alarmsounds

Mineral deposit build−up in module Flush module (See ec−H2OMODULE FLUSH PROCEDURE),if indicator light starts flashingwithin 1−10 seconds, repeat flushprocedure. If indicator light startsflashing after a minute ofscrubbing, the water may have lowconductivity.

Low water conductivity Add 8ml of salt to every 40 L ofwater.

ec−H2O Model: ec−H2O system indicatorlight solid red

Defective module Contact Service Center

ec−H2O Model: ec−H2O system indicatorlight does not turn on

Defective light or module Contact Service Center

ec−H2O Model: No water flow

Clogged module Contact Service Center

Defective solution pump Replace solution pump

Clogged filter screen Clean filter screen

MAINTENANCE

44 T20 Gas/LPG 331481 (5−08)

MAINTENANCE

1

2

3

4

5

6

7

8 9

19

10

12

1413

1516

11

17

18

7

20

20

MAINTENANCE

45T20 Gas/LPG 331481 (3−2013)

MAINTENANCE CHART

The table below indicates the Person Responsible for each procedure.O = Operator.T = Trained Personnel.

IntervalPersonResp. Key Description Procedure

Lubricant/Fluid

No. ofServicePoints

Daily O 1 Engine Check oil level EO 1Check coolant level in reser-voir

WG 1

O 10 Hydraulic fluid reservoir Check fluid level HYDO 1O 8, 9 Tank cover seals Check for damage or wear − 3O 3, 14 Main brushes (Cylindri-

cal)Check for damage and wear − 2

O 3, 14 Main brushes or pads(Disk)

Check for damage and wear − 3

O 4 Side brush (option) Check for damage and wear − 1Check squeegee blade fordamage and wear

− 1

O 6 Rear squeegee blade Check for damage and wear − 1Check deflection − 1

O 7 Side squeegee blades Check for damage and wear − 2O 8 Recovery tank Clean − 1O 8 Recovery tank, ES

mode (option)Clean ES filter − 1

O 9 Solution tank, ES mode(option)

Clean − 1

O 5 Debris tray Clean debris tray, screen,and hose

− 1

50Hours

O 16 FaST / ec−H2O filterscreen (Option)

Clean − 1

O 3, 14 Main brushes (Cylindrical)

Rotate front to rear − 2

T 3, 14 Main brushes (Cylindrical)

Check brush pattern andadjust if needed

− 2

T 13 Front wheel Torque wheel nuts (after initial 50 hours only)

− 1

T 15 Battery Clean and tighten batterycable connections (after initial 50 hours only)

− 1

T 1 Engine Check belt tension − 1

MAINTENANCE

46 T20 Gas/LPG 331481 (1−2015)


Lubricant/Fluid

No. ofServicePoints

100Hours

T 19 Radiator Clean core exterior − 1T 19 Hydraulic cooler Clean core exterior − 1T 1 Engine Change oil and filter EO 1

Drain LPG vaporizer oilbuildup

− 1

Engine, GM (S/N 0000−0499)

Drain oil from electronicpressure regulator (EPR)

− 1

O 13, 20 Tires Check for damage − 3T 6 Rear squeegee casters Lubricate SPL 2T 6 Rear squeegee Check leveling − 1

100Hours

O 2 Scrub head skirt Check for damage or wear − 1

T 3, 14 Disk scrub head stopbumper

Check for damage or wear − 2

200Hours

T 12 Front wheel supportbearings

Lubricate SPL 2

T 17, 18 Torque tube (Cylindricalbrushes)

Lubricate SPL 4

T 3, 14 Torque tube (Diskbrushes)

Lubricate SPL 4

T 3 Pivot shaft (Diskbrushes)

Lubricate SPL 4

T 12 Steering cylinder Lubricate SPL 1T 1, 19 Radiator hoses and

clampsCheck for tightness andwear

− 2

T 11 Brake pedal Check adjustment − 1

T 16 FaST air filter (Option)(S/N 0000−0129)

Clean − 1

400Hours

T 1 Engine, GM (S/N 0000−0499)

Clean and re−gap or replacespark plugs

− 4

T 1 Engine Replace air filter − 1Replace fuel filter − 1

T 20 Rear wheel bearings Check, lubricate, and adjust SPL 2800Hours

T 10 Hydraulic reservoir Replace filler cap HYDO 1T 1 Engine, GM

(S/N 0000−0499)Check timing belt − 1

T − Hydraulic hoses Check for wear and damage − AllT 1, 19 Cooling system Flush WG 2T 13 Propelling motor Torque shaft nut − 1T 13 Front wheel Torque wheel nuts − 1

T 15 Battery Clean and tighten batterycable connections

− 1

1000Hours

T 16 FaST system filters(S/N 0130− )

Replace − 2

T 1 Engine, Mitsubishi (S/N 0500− )

Replace spark plugs − 4

T 1 Engine Inspect PCV system − 1T 1, 19 Radiator hoses Check for cracks or

deterioration− 2

MAINTENANCE

47T20 Gas/LPG 331481 (9−2014)


Lubricant/Fluid

No. ofServicePoints

1200Hours

T 10 Hydraulic fluid filter * Replace fluid filter − 1

2000Hours

T 1 Engine, GM (S/N0000−0499)

Replace timing belt − 1

2400Hours

S 10 Hydraulic fluid reservoir * Replace strainer outlet − 1* Change hydraulic fluid HYDO 1

5000Hours

S 1 Engine, Mitsubishi (S/N 0500− )

Replace camshaft andbalance shaft belts

− 2

NOTE: Change the hydraulic fluid, filter, and suction strainer, indicated (*), after every 800 hours formachines NOT originally equipped with TennantTrue premium hydraulic fluid. (See Hydraulics section).

LUBRICANT/FLUID

EO Engine oil, 5W30 SAE−SG/SH only.. . . .HYDO TennantTrue premium hydraulic fluid or equivalent.WG Water and ethylene glycol anti-freeze, −34� C (−30� F). . .SPL Special lubricant, Lubriplate EMB grease (Tennant part number 01433−1). . .

NOTE: More frequent maintenance intervals may be required in extremely dusty conditions.

MAINTENANCE

48 T20 Gas/LPG 331481 (1−2015)

LUBRICATION


ENGINE OIL

Check the engine oil level daily. Change the oiland oil filter after every 100 hours of operation.

Fill the engine with oil until the oil is between theindicator marks on the dipstick. DO NOT fill pastthe top indicator mark.

The engine oil capacity for GM engines(machines serial number 0499 and below) is 3.5 L(3.7 qt) with oil filter.

The engine oil capacity for Mitsubishi engines(machines serial number 0500 and above) is 4.7 L(5 qt) with oil filter.

SQUEEGEE CASTER BEARINGS

Lubricate the squeegee caster bearings afterevery 100 hours of operation.

FRONT WHEEL SUPPORT BEARING

Lubricate the front wheel support bearings afterevery 200 hours of operation. Both front wheelsupport grease fittings are located underneath theframe support plate.

STEERING CYLINDER BEARING

Lubricate the steering cylinder after every 200 hours of operation. The steering cylinderbearing is located next to the front wheel support.

REAR WHEEL BEARINGS

Inspect the rear wheel bearings for seal damage,and repack and adjust every 400 hours ofoperation. Use Lubriplate EMB grease (Tennantpart number 01433−1).

MAINTENANCE

49T20 Gas/LPG 331481 (1−07)

TORQUE TUBES−CYLINDRICAL BRUSHES

Lubricate the torque tubes after every 200 hoursof operation. The torque tube grease fittings onthe operator side of the machine are locatedbeneath the fuel tank.

On the other side of the machine the torque tubegrease fittings are located beneath the propelpump.

TORQUE TUBES−DISK BRUSHES

Lubricate the three torque tube fittings after every200 hours of operation. The first two fittings arelocated on each side of the machine and the thirdis located above the center brush.

PIVOT SHAFT−DISK BRUSHES

Lubricate the pivot shaft after every 200 hours ofoperation.

MAINTENANCE

50 T20 Gas/LPG 331481 (3−2013)

HYDRAULICS


Check the hydraulic fluid level at operatingtemperature daily. The hydraulic fluid level shouldbe between the two lines on the hydraulic gauge.

ATTENTION! Do not overfill the hydraulic fluidreservoir or operate the machine with a lowlevel of hydraulic fluid in the reservoir.Damage to the machine hydraulic system mayresult.

Drain and refill the hydraulic fluid reservoir withnew TennantTrue premium hydraulic fluid afterevery 2400 hours of operation. Machines have ablue colored drop (left photo) on the hydraulic fluidlabel if originally equipped with TennantTruepremium hydraulic fluid.

WARNING: Burn hazard. Hot surface. DoNOT touch.

TennantTrue Fluid Previous Fluid

Replace the filler cap after every 800 hours ofoperation. Apply a light film of hydraulic fluid ontothe filler cap gasket before installing the cap ontothe reservoir.

Replace the hydraulic fluid filter after every 1200 hours of operation or if the hydraulicreservoir gauge is in the yellow/red zone when thereservoir hydraulic fluid is approximately 32� C(90� F).

Replace the hydraulic strainer outlet after every2400 hours of operation.

MAINTENANCE

51T20 Gas/LPG 331481 (1−2015)

HYDRAULIC FLUIDThere are three fluids available for differentambient air temperature ranges.

TennantTrue premium hydraulic fluid (Extended Life)

PartNumber

Capacity ISOGradeViscosityIndex (VI)

Ambient AirTemperatureRanges

1057710 3.8 L

(1 gal)

ISO 100

VI 126 orhigher

19� C(65� F) orhigher

1057711 19 L

(5 gal)

99321 20 L (5.3 gal)

ISO 68

VI 155 orhigher

7 to 43� C

(45 to110� F)

1057707 3.8 L

(1 gal)

ISO 32

VI 163 orhigher

16� C(60� F) orlower

1057708 19 L (5 gal)

If using a locally-available hydraulic fluid, be surethe specifications match Tennant hydraulic fluidspecifications. Substitute fluids can causepremature failure of hydraulic components.

ATTENTION! Hydraulic components dependon system hydraulic fluid for internallubrication. Malfunctions, accelerated wear,and damage will result if dirt or othercontaminants enter the hydraulic system.

HYDRAULIC HOSES

Check the hydraulic hoses after every 800 hoursof operation for wear or damage.

FOR SAFETY: When servicing machine, usecardboard to locate leaking hydraulic fluidunder pressure.

High pressure fluid escaping from a very smallhole can almost be invisible, and can causeserious injuries.

00002

Consult a physician immediately if injury resultsfrom escaping hydraulic fluid. Serious infection orreaction can occur if proper medical treatment isnot given immediately.

Contact a mechanic or supervisor if a leak isdiscovered.

MAINTENANCE

52 T20 Gas/LPG 331481 (3−2013)

ENGINE


COOLING SYSTEM

FOR SAFETY: When servicing machine, avoidcontact with hot engine coolant. Do notremove cap from radiator when engine is hot.Allow engine to cool.

Check the coolant level in the reservoir daily. Thecoolant level must be between the indicator markswhen the engine is cold. Refer to the coolantmanufacture for water/coolant mixing instructions.

Flush the radiator and the cooling system afterevery 800 hours of operation.

The cooling system must be completely filled withcoolant to keep the engine from overheating.When filling the cooling system, open the draincocks to bleed the air from the system.

Location of drain cock on LPG machines formachines serial number 0043and below.

Location of drain cock on gasoline machines formachines serial number 0043and below. Removethe panel from operators compartment to accessthe drain cock.

Check the radiator hoses for cracks anddeterioration after every 1000 hours of operation.

Check the radiator hoses and clamps after every200 hours of operation. Tighten loose clamps.Replace damaged hoses and clamps.

MAINTENANCE

53T20 Gas/LPG 331481 (3−2013)

Check the radiator core exterior and hydrauliccooler fins for debris after every 100 hours ofoperation. Blow or rinse all dust through the grilleand radiator fins, in the opposite direction ofnormal air flow. Be careful to not bend the coolingfins when cleaning. Clean thoroughly to preventthe fins from becoming encrusted with dust. Toavoid cracking the radiator, allow the radiator andcooler fins to cool before cleaning.

AIR FILTER

Replace the air filter after every 400 hours ofoperation.

FUEL FILTER (LPG)

Replace the LPG fuel filter after every 400 hoursof operation.

Disassemble the fuel lock off valve to access theLPG fuel filter.


MAINTENANCE

54 T20 Gas/LPG 331481 (3−2013)

ELECTRONIC PRESSURE REGULATOR (LPG)(For machines serial number 0044 − 0499)

Remove the sensor and drain the oil from the LPGelectronic pressure regulator after every 100hours of operation.


LPG VAPORIZER

Drain oil buildup in the LPG vaporizer after every100 hours of operation.


FUEL FILTER (Gasoline)

Replace the gasoline fuel filter after every 400hours of operation.


Location of fuel filter on machines serial number0043 and below.

Location of fuel filter on machines serial number0044 and above.

MAINTENANCE

55T20 Gas/LPG 331481 (3−2013)

ENGINE BELT

Check the belt tension daily. Adjust tension asnecessary. Proper belt tension is 13 mm (0.50 in)from a force of 4 to 5 kg (8 to 10 lb) applied at themid-point of the longest span.

WARNING: Moving belt and fan. Keepaway.

PCV SYSTEM

Inspect the PCV system after every 1000 hours ofoperation.

SPARK PLUGS − GM ENGINES (S/N 0000 − 0499)

Clean or replace, and set the gap of the sparkplugs after every 400 hours of operation. Theproper spark plug gap is 1 mm (0.042 in).

SPARK PLUGS − MITSUBISHI ENGINES (S/N 0500− )

Replace the spark plugs after every 1000 hours ofoperation.

MAINTENANCE

56 T20 Gas/LPG 331481 (02−2013)

TIMING BELT − GM ENGINES (S/N 0000 − 0499)

Check the timing belt after every 800 hours ofoperation.

Replace the timing belt after every 2000 hours ofoperation.

CAMSHAFT AND BALANCE SHAFT BELTS −MITSUBISHI ENGINES (S/N 0500− )

Replace the camshaft and balance shaft beltsafter every 5000 hours of operation.

BATTERY

Clean and tighten the battery connections afterthe first 50 hours of operation and after every 800hours after that. Do not remove the vent plugsfrom the battery or add water to the battery.

FOR SAFETY: When servicing machine, avoidcontact with battery acid.

MAINTENANCE

57T20 Gas/LPG 331481 (5−10)

FUSES AND RELAYS

RELAY PANEL FUSES AND RELAYS

Fuses are one-time protection devices designedto protect the wire harness by stopping the flow ofcurrent in the event of a circuit overload. Relaysswitch the electrical power going to the machineelectrical systems on/off. Remove the relay panelcover to access fuses and relays.

NOTE: Always replace a fuse with a fuse of thesame amperage. Extra 15 Amp fuses areprovided inside the relay panel drawer on therelay panel.

Refer to the diagram below for locations of thefuses and relays on the relay panel. The M10relay for the optional spray nozzle is locatedbehind the battery.

Refer to the table below for the fuses and circuitsprotected.

Fuse Rating Circuit Protected

FU1 15 A Auxiliary Relays/Engine Controls

FU2 15 A Shaker

FU3 15 A Horn

FU4 15 A Not Used

FU5 15 A Scrub Vacuum/Main Brush/Squeegee Down

FU6 15 A Enable/Side Brush

FU7 15 A Solution/Auto Fill/Reverse

FU8 15 A ES/FaST/Detergent/Spray Wand

FU9 15 A Lights

FU10 15 A Unswitched B+ for controller board

FU11 15 A Not Used: Options

FU12 15 A Spray Nozzle Pump

FU13 15 A Not Used

FU14 15 A Not Used

− 20 A ec−H2O (near ignition switch)

Refer to the table below for the relays and circuitscontrolled.

Relay Rating Circuit Controlled

M1 12 VDC, 40 A Auxiliary 1

M2 12 VDC, 40 A Auxiliary 2

M3 12 VDC, 40 A Not Used

M4 12 VDC, 40 A Reverse

M5 12 VDC, 40 A Horn

M6 12 VDC, 40 A Shutdown

M7 12 VDC, 40 A Starter



M10 12 VDC. 40 A Not Used

M11 12 VDC. 40 A FaST Water Pump (located in FaST harness)

M12 12 VDC. 40 A Spray Wand (located in Spray wand harness)

MAINTENANCE

58 T20 Gas/LPG 331481 (5−10)

ENGINE HARNESS FUSES AND RELAYS

The engine harness fuses and relays are locatedin the fuse box inside the engine compartment.Refer to the fuse box cover for locations of engineharness fuses and relays.

NOTE: Always replace a fuse with a fuse of thesame amperage.

CIRCUIT BREAKERS (ec−H2O)

Circuit breakers are resettable electrical circuitprotection devices that stop the flow of current inthe event of a circuit overload. Once a circuitbreaker is tripped, allow breaker to cool and thenpress the reset button to manually reset thebreaker.

SCRUB BRUSHES AND PADS

The machine can be equipped with either disk orcylindrical scrub brushes, or cleaning pads. Checkscrub brushes or pads daily for wire or stringtangled around the brush or brush drive hub. Alsocheck brushes or pads for damage and wear.

DISK BRUSHES

Replace the brushes when they no longer cleaneffectively.

Cleaning pads must be placed on pad driversbefore they are ready to use. The cleaning pad isheld in place the center disk.

Cleaning pads need to be cleaned immediatelyafter use with soap and water. Do not wash thepads with a pressure washer. Hang pads, or laypads flat to dry.

NOTE: Always replace brushes and pads in sets.Otherwise one brush or pad will be moreaggressive than the other.

MAINTENANCE

59T20 Gas/LPG 331481 (1−07)

REPLACING DISK BRUSHES OR PAD DRIVER

1. Raise the scrub head.


2. Open the right outer brush door.

3. Hold down the release lever and rotate theadjustable disk brush head until it is possibleto access the center brush.

4. Turn the brushes until the spring handles arevisible.

5. Squeeze the spring handles and let thebrushes drop to the floor.

6. Remove the brushes from underneath thescrub head.

7. Place the new brushes underneath the scrubhead and lift each brush up onto the hub untilthe brush locks onto the hub.

8. Rotate the disk brush head back to the scrubposition until the head locks into place.

9. Close the right outer brush door.

10. Open the left outer brush door and repeat theprocedure for the left brush.

NOTE: The center brush can only be accessedfrom the right side of the machine.

MAINTENANCE

60 T20 Gas/LPG 331481 (3−2013)

REPLACING DISK PADS

1. Remove the pad driver from the machine.

2. Squeeze the spring clip together to removethe center disk.

3. Flip or replace the scrub pad, center the scrubpad on the pad driver. Then reinstall thecenter disk to secure the pad in place on thepad driver.

4. Reinsert the pad driver into the machine.

CHECKING THE DISK SCRUB HEAD STOPBUMPERS

The disk scrub head stop bumpers keep the scrubhead parallel with the floor when in the raisedposition. This protects the brushes whentransporting. Check the lift stop bumpers afterevery 100 hours of operation for wear or damage.

1. Raise the scrub head.


2. Open the right and left outer brush doors.

3. Inspect the scrub head stop bumpers. Adjustthe bumpers if the scrub head is not parallelwith the floor. Replace worn or damagedbumpers.

MAINTENANCE

61T20 Gas/LPG 331481 (3−2013)

CYLINDERICAL BRUSHES


Check the brush pattern and rotate the brushesfrom front-to-rear after every 50 hours of machineoperation for maximum brush life and bestscrubbing performance.

Replace the brushes when they no longer cleaneffectively.

NOTE: Replace worn brushes in pairs. Scrubbingwith brushes of unequal bristle length will result indiminished scrubbing performance.

REPLACING OR ROTATING CYLINDERICALBRUSHES

The front brush can be accessed on the left sideof the machine and rear brush can be acce

Documents

(Gas/LPG) Rider Scrubber English EN Operator Manual · 2016. 5. 12. · 2. Before starting machine: −Check for fuel, oil, and liquid leaks. −Keep sparks and open flame away from