Prelube System

ApplicationEngineeringBulletin

Subject This AEB is for the following applications:Cummins Prelub for QST30 andQSK45/60/78 Construction Engines Automotive Industrial Power Generation

Date December 2000 Page 1 of 26 AEB Number 44.01

Engine Models included: QST30, QSK45/60/78

Fuel Systems included:

PRELUB OVERVIEWPurpose of Prelub System

The RPM Prelub System was introduced on Cummins high horsepower engines to distribute oil throughout thelubrication system in the engine before starting. This automatic system uses a motor driven pump to supply oilfrom the sump to the main oil rifle prior to starting the engine. A prelubrication system assures oil pressure in themain rifle and oil availability to all friction surfaces in the engine at startup. Thus, engine wear is reduced. It alsoreduces the risk of starting the engine without oil in the engine sump or dry oil filters.

There are three types of prelubrication systems.

Integral Prelub

This system is an integral prelubrication pump and engine starter motor. Integral Prelub is mounted at the lowerstarter bore location. Integral Prelub is available for engine sizes 30 liters and less.

Non-Integral Prelub

Features a pump and electric motor assembly that can be engine or chassis mounted. The non-integral system isavailable for engine sizes 19 liters and less.

High Volume Pump (HVP) Prelub

The Prelub HVP has increased flow capability. The HVP series was mandated for engine sizes of 45 liters andlarger. The Prelub HVP can be engine or chassis mounted.

Operation of Prelub System

The Prelub or HVP system is activated when the operator turns the key switch to the start position. With the keyin the start position, the Prelub timer relay is energized to provide power to the pump assembly. For integralsystems, power is applied only to the motor. The starter solenoid remains de-energized to prevent cranking. ThePrelub pump will draw oil from the oil pan, pass through the oil filters, and fill the oil galleries of the engine. Oncethe main oil rifle is pressurized, a normally closed switch will open. The timer solenoid recognizes the open circuitat the pressure switch and de-energizes the time solenoid relay to stop the motor. For integral and non-integralPrelub systems, the timer relay will delay 3 seconds before the starter circuit is activated to crank the engine. Thetimer relay will immediately activate the cranking circuit for HVP Prelub systems.

The time for the Prelub system to generate sufficient pressure will be affected by oil viscosity. Consequently, fora given oil grade, the time to reach pressure will increase with cold temperatures. In order to maintain acceptablePrelub times apply arctic weather treatments as advised in the engine Operation & Maintenance Manual.

AEB 44.01Page 2 of 26

Table of Contents

Introduction .........................................................................................................................................1Purpose of Prelub System................................................................................................................1

Integral Prelub...........................................................................................................................1Non-Integral Prelub....................................................................................................................1High Volume Pump (HVP)..........................................................................................................1

Operation of Prelub System.........................................................................................................1

Table of Contents.................................................................................................................................2

Requirements.......................................................................................................................................3Pump/Motor.....................................................................................................................................3Time Relay Solenoid ........................................................................................................................3Harness ..........................................................................................................................................3Standard Plumbing...........................................................................................................................3

Prelub Application ...............................................................................................................................4

Prelub System Layout ......................................................................................................................5Prelub Pump Assembly ..............................................................................................................5Time Relay ................................................................................................................................5Plumbing...................................................................................................................................5Wiring and Harness with Fuse ....................................................................................................5

Prelub System Arrangements........................................................................................................... 6-8Integral Prelub System.....................................................................................................................6Non-Integral Prelub System..............................................................................................................7Prelub HVP Systems .......................................................................................................................8

Installation Requirements............................................................................................................... 9-16Pump and Motor..............................................................................................................................9Prelub Plumbing ..............................................................................................................................9

Suction Side Hose .....................................................................................................................9Pressure Side Hose.............................................................................................................. 9-10Pressure Switch....................................................................................................................... 10Timer Relay ............................................................................................................................. 10Torque Recommendations ....................................................................................................... 11Wire Harness...................................................................................................................... 11-12HVP Installation.................................................................................................................. 12-16

Reference Documents........................................................................................................................ 16Appendix ...................................................................................................................................... 17-26

High Volume Pump (HVP) Prelub.................................................................................................... 18Integral Prelub Pump/Motor Cut Away ............................................................................................. 19Electrical Components and Sensors ........................................................................................... 20-23

Timer Relay ........................................................................................................................ 20-21300 AMP Fuse......................................................................................................................... 22400 AMP Fuse......................................................................................................................... 22Prelub Pressure Switch............................................................................................................ 23

Pump/Motor Bracket for Chassis Mounted and Engine Mounted ....................................................... 24Wire Diagrams.......................................................................................................................... 25-26

Integral Prelub System - Single Starter...................................................................................... 25Integral Prelub System - Dual Starter ........................................................................................ 25Chassis Mounted Standard Prelub ............................................................................................ 26HVP Prelub System ................................................................................................................. 26


GENERAL PRELUB SYSTEM REQUIREMENTS

Pump/Motor

Maximum pump/motor height• 12 inches (305mm) above crankshaft centerline

Timer Relay SolenoidTimer relay solenoid orientation• Minimize external forces along relay axis. Should be mounted such that axis of solenoid is parallel to the

ground. For mobile equipment such as haul trucks, this axis should be perpendicular to the forward/reversedirections of equipment.

HarnessFuse is to be mounted in power supply to the timer solenoid relay• Prelub: 300 amp fuse• HVP: 400 amp fuse

Maximum resistance of main power circuit• 0.004 ohm (24 volt standard system)• 0.003 ohm (HVP system)

Minimum wire gage for Prelub motor power circuit• Prelub: #4 gage• HVP: #0 gage

Minimum wire insulation temperature capability• 120o C

Wire insulation material• Thermoset plastic

Do not place excessive strain on any Prelub harness wires or connections

Standard PlumbingSuction side hose requirements• Prelub: #20 hose with 1 1/8" ID (> 30 liters) #16 hose with 7/8 " ID (< = 30 liters)• HVP: #20 hose with 1 1/8" ID• Maximum length: 50" (1.27m)• Suction hose is plumbed in designated Prelub oil pan port

Pressure side hose requirements• Prelub: #12 hose with 5/8" ID (> 30 liters) #10 hose with 1/2" ID (< = 30 liters)• HVP: #16 hose with 7/8" ID• Pressure hose is plumbed before filters

Recommended Hose Material to conform per Material Spec 23178.

Maximum Hose length: Ratio of maximum pressure hose length to maximum suction hose length Suction Hose Size

Pressure Hose Size#16, 7/8" ID #20, 1 1/8" ID

HVP#20, 1 1/8” ID

#10, 1/2" ID 2.5:1 1.5:1 N/A#12, 5/8" ID 4.5:1 2.5:1 N/A#16, 7/8" ID 10:1 7:1 4:1


PRELUB APPLICATION

QSK45/60/78

These engines will offer the higher capacity HVP pump in order minimize engine pre-lubrication time. The PrelubHVP is a stand-alone pre-lube pump. Also included is a new timer solenoid, 2-terminal pressure switch, and 400Amp fuse. Because the pre-lube pump is separate from the starter motor there is no need to delay engagementof the starter motor when the oil rifle pressure has reached the 2.5 psi trip point. Therefore, the HVP uses azero-second delay timer in place of the three-second delay used with the integral pre-lube pump.For the QSK45 engine, the Prelub HVP is available only as a remote off-engine installation due to spaceconstraints. For the QSK60 engine, the Prelub HVP is available both on- and off-engine.

QST30

This engine will continue to use integral Prelub starter motors. Product improvements implemented include amore durable timer solenoid, a 300 Amp slow-burn fuse, and a 2-terminal 2.5 psi pressure switch. The pressureswitch trip point has been reduced from 4 psi to 2.5 psi in order to ensure adequate startability.

Newly Available Options for 2001

HVP off-engine HVP off-engineEngine Model With LB starters With RB startersQSK45 ST6098 ST6099

PL6731 PL6731

HVP off-engine HVP off-engineHVP on-engine HVP off-engine Remote LOFH Remote LubeWith Spin-on Filters With Eliminator w/ Eliminator w/ Spin-on Filters

QSK60 ST6095 ST6096 ST6097 ST6097PL6728 PL6729 PL6726 PL6730

HVP on-engineWith Eliminator

QSK78 ST6089PL6724 – no wiring harnessPL6727 – wiring harness

Standard Prelub Deep Rear SumpQST30 PL5707 PL5709


Overview of Typical Prelub System Layout

Major Components of the Prelubrication System include:

Prelub Pump Assembly (starter or remote mounted)

• Composed of a gear pump and an electric motor• Pressurizes engine oil rifle

Timer Relay

• Composed of magnetic relay and timer logic module• Controls the activation/deactivation of the Prelub system

Pressure Switch

• Normally closed oil pressure switch• Identifies when specified pressure is achieved in the engine oil galleries

Plumbing

• Required plumbing includes suction side hose to oil pan, pressure side hose to engine, and check valve at theengine for the pressure side hose

Wiring and Harness with Fuse

• Integrates the electrical components of the Prelub system• Connects the pressure switch, key switch, and starter relay to the timer solenoid and Prelub motor


PRELUB SYSTEM ARRANGEMENTS

Integral Prelub Systems

Integral Prelub system can be applied where electric starters are used. The prelubrication starter/pump issubstituted for the lower conventional starter. With the integral system most of the Prelub components will beinstalled on engine at the factory. The starter/pump, pressure switch, and plumbing will be installed at the factory.Only the timer relay and wire harness need to be installed by the OEM.

The integral Prelub system is available for engine sizes 30 liters or less.

The ST options in the engine sales handbook will detail the Integral Prelub mounting locations and arrangements.

Integral System Assembly• Starter and Pump Assembly (A)• Timer Solenoid (B)• Oil Pressure Switch (C)• Plumbing: Suction Line (D), Outlet Line (E), and Check Valve (F)• Wiring Harness


Non-Integral Prelub System

The non-integral Prelub System is similar to the integral system. In this system a dedicated Delco motor is usedto drive the Prelub pump. The pump is not integrated with the starter motor.

The non-integral Prelub systems offer the OEM flexibility in mounting the Prelub system on the chassis or theengine. The OEM is responsible for installing and mounting the pump, plumbing, timer relay and wire harness.

Non-Integral Prelub Assembly• Motor and Pump (A)• Timer Relay (B)• Oil Pressure switch (C)• Suction Line (D), Outlet Line (E), and Check Valve (F)• Remote Mounting Bracket (G)


Prelub HVP Systems

For engines of 45 liters and larger, RPM has developed the Prelub HVP system. The Prelub High Volume Pump(HVP) provides higher oil flows into the engine. The increased flow is required for the larger engines to quicklypressurize the engine oil rifle.

Due to the pump design, the Prelub HVP system cannot be integrated with the engine starter motor.Consequently, the HVP Prelub system is available mounted on the engine or on the chassis. The enginemounted version of the Prelub HVP system is mounted to the engine via bracket. An example is shown below.Refer to the engine sales handbook for mounting arrangement details.

• Engine mounted Prelub HVP system is installed on the engine at the factory. The pump, hoses, and pressureswitch are mounted at the factory. The OEM will install only the wire harness and timer relay.

• The chassis mounted Prelub HVP uses the same motor and pump as the engine mounted system. A bracketfor the HVP motor/pump assembly is provided with the engine in kit. The OEM is responsible for mountingthe pump on the chassis. The OEM is also responsible for installing the plumbing, wire harness, and timerrelay. The HVP engine mounted bracket is in the appendix for reference.


INSTALLATION REQUIREMENTSPump and MotorFor engine mounted Prelub and Prelub HVP systems, the location for the Prelub motor is selectable via thestarter motor application option (ST option). The Prelub pump/motor, hose and pressure switch are mounted atthe factory.

Chassis mounted Prelub and HVP systems require a bracket for mounting the Prelub motor. A bracket issupplied in a kit with the engine. Drawings of the Prelub HVP brackets are included in the appendix.

The pump mounting location on the chassis must be no higher than 1 foot above the engine crankshaft. Thelocation must also be no further than 1270 mm [50 in] from the suction port in the oil pan. There is no limitationon the orientation of the installed pump.

The wiring to the Prelub motor is documented in the appendix.

HVP pump maximum duty cycle is 4 minutes ON and 30 minutes OFF. The ambient temperature range is from–40° to 125°C (-40° to 257°F).

Prelub Plumbing

Suction Side HoseThe suction side hose will connect the oil pan sump to the Prelub pump. The suction hose will be installed at thefactory for engine mounted Prelub systems.

For optimum performance, the length of the suction side hose should be minimized. The OEM is responsible forinstalling the suction hose for chassis mounted systems. For standard Prelub system, engines larger than 30liters should use a #20 with 1 1/8” ID for the suction side hose. A #16 with 7/8” ID hose should be used forengine sizes 30 liters and less. The HVP system will use a #20 with 1 1/8” ID. HVP system oil pan suction fittingshould have at least 1” ID (1 5/8” ORB, 1” NPT, M42).

The suction hose length is not to exceed 1270 mm [50 in] in length. The OEM should cut the hose to fit theinstallation.

The oil supply port location varies by engine model. Refer to the oil pan option in the sales handbook for thedesignated Prelub port. The oil drain ports must not be used.

Clips for the hose need to be used to avoid rubbing or excessive vibration. The clips are OEM supplied.

Pressure Side HoseThe pressure side hose will connect the Prelub pump to the engine. The pressure hose will be installed at thefactory for engine mounted Prelub systems.

For chassis mounted Prelub systems, a #10 hose with ½” ID is supplied in the Prelub kit with the engine. HVPPrelub systems will be supplied with a #16 hose with 7/8” ID. The kit pressure side hose should be cut to fit theOEM application. HVP system oil return port should have at least 0.6” ID (3/4” pipe, 1 1/16” ORB, M22).

The length of the pressure side hose is limited by diameters of the pressure and suction hoses as well as thelength of the suction side hose. The table below provides the maximum pressure hose length to suction hoselength ratios. Installations should use only high quality SAE connections and fittings for oil lines.

Maximum Hose length: Ratio of maximum pressure hose length to maximum suction hose length Suction Hose Size

Pressure Hose Size#16, 7/8" ID #20, 1 1/8" ID HVP - #20

#10, 1/2" ID 2.5:1 1.5:1 N/A#12, 5/8" ID 4.5:1 2.5:1 N/A#16, 7/8" ID 10:1 7:1 4:1


The port location for the oil pressure hose will vary by engine model. Acceptable port locations are documentedon the engine installation diagrams. For every installation, the pressure side hose must be connected before theengine lubrication filters.

The check valve is to be installed where the pressure side hose is attached to the engine. Flow through the valveis to be toward the engine. The valve will prevent reverse flow after the engine is started. If the check valve isinstalled incorrectly, Prelub motor failure may result.

Pressure Switch

A pressure switch (normally closed) is included. This switch must be located to sense oil pressure after the oilhas passed through the full flow oil filters. Switch has a 2.5 +/-0.5 psi pressure setting and a 2-terminal Packardconnection which will improve assembly of the wiring harness to the switch.

The recommended location is at the main oil rifle at the rear of the block or flywheel housing.

See the appendix for pressure switch performance and terminal specifications.

Timer Relay

The timer relay must be mounted off the engine. The mounting technique should protect the unit from shock &vibration, excessive temperatures and direct high-pressure sprays.

The relay must be mounted to minimize the shock and vibrations along the axis of the relay canister. For mostwheeled applications, the timer relay canister should be mounted with the canister horizontal and axis of thecanister at 90° to the crankshaft centerline. Mounting the canister horizontally will minimize the chance of theswitch being actuated because of vertical “shock loading”. Mounting the canister at 90° to the direction of travelwill minimize the chance of the switch being activated due to “shock loading” from the vehicle.

The relay must also be mounted to avoid heat sources such as mufflers and exhaust manifolds. The relay shouldnot be exposed to ambient temperatures over 185° F (85° C).

The relay should be protected from direct contact of a high pressure wash. Moisture may enter the canister anddamage functionality.

Refer to the appendix for the timer relay’s terminal specifications and bracket mounting details.


Torque Recommendations

Switch Timer Connections:3628971 and 3675123PL

Coil Leads 25 in-lb 2.8 N-mPower Leads 45-50 in-lb 5-5.6 N-m

3633715 and 4065468 Heavy dutyCoil Leads 20 in-lb 2.25 N-mPower Leads 90-110 in-lb 11.3-12.4 N-m

50MT Starter Connections:3084198, 3628997, 3628757, 3629866, 3171100, 3410641, 3093137, 3603868PL, 3604658PL,3604645PL, 3603866PL, 3675199PL

Battery Positive Stud 20-25 ft-lb 27-34 N-mMotor Terminal 20-25 ft-lb 27-34 N-mGround Stud 20-25 ft-lb 27-34 N-m“S” Terminal 16-30 in-lb 1.8-3.4 N-m

42 MT Starter Connections:3094371, 3094393, 3604321PL, 3604484PL, 3604322PL

Battery Positive Stud 20-25 ft-lb 27-34 N-mMotor Terminal 20-25 ft-lb 27-34 N-mGround Stud 20-25 ft-lb 27-34 N-m“S” Terminal 16-30 in-lb 1.8-3.4 N-m

41RM Connections:3628965, 3630004, 3675250PL

Battery Positive Term 85 in-lb 9.5 N-mGround Stud 20-25 ft-lb 27-34 N-m

40RM Connections:3652546PL

Battery Positive Stud 20-25 ft-lb 27-34 N-mGround Stud 20-25 ft-lb 27-34 N-m

Pressure Switches:3629867, 3084200, 3628750, 3652554PL, 3652721PL

Installation Torque Hand Tight and 1.5 turns when using thread sealer.Hand Tight and 2 turns when no thread sealer.

Screw Terminals 12-15 in-lb 1.3-1.7 N-m3094392, 3171350

Installation Torque 19-23 ft-lb 25-30 N-mScrew Terminals 12-15 ft-lb 1.3-1.7 N-m

3347747Installation Torque 23-24 ft-lb 32-33 N-mScrew Terminals 15-20 in-lb 1.3-1.7 N-m

Check Valves3804202, 3628751, 3633246, 3675124PL, 4007201, 4065979

Installation Torque Hand Tight plus 1.5 turns3094401

Installation Torque 55-70 ft-lb 75-95 N-m


Wire Harness

A wire harness for the Prelub system is provided in a kit with the engine. The provided wire harness will connectthe pressure switch and the Prelub motor to the timer relay. The OEM is responsible for providing system voltageto the B+ terminal on the Prelub starter motor or the B+ terminal of the chassis mounted Prelub harness. TheOEM is also responsible for providing a ground wire from the Prelub motor back to the batteries. The wiring forthe Prelub system and cranking motor must meet Cummins wiring requirements. See AEB 111.15 for wiringrequirements.

The harness will also include a fuse to protect the Prelub circuit. In accordance with Cummins AEB 111.15 allcircuits (except cranking) must be protected by a fuse. The nominal, steady state, current draw during a Prelubcycle is approximately 200amp, and maximum current draw is approximately 270amp. Consequently, the Prelubharness is sized smaller than a cranking motor harness. However, if the motor fails during the Prelub cycle, themotor is capable to pull much higher currents. The smaller Prelub harness is more susceptible to damage whencompared to the larger cranking harness. The fuse will protect the Prelub harness from progressive damage.

It is recommended that the wire harness included with the Prelub system is used in the engine installation.However, if the OEM is unable to use the standard harness, the OEM may accept design responsibility anddevelop a custom harness. If a custom harness is developed, refer to AEB 111.15 design guidelines. Additionalrecommendations unique to the Prelub system include:

Minimum wire size• Prelub: #4 gage• Prelub HVP: #0 gage

Maximum resistance of main power circuit• 0.004 ohm (24 volt standard system)\• 0.003 ohm (HVP system)

Wire installation temperature capability• 120o C

Wire installation material• Thermoset plastic

Fuse• Prelub: 300 amp maximum• Prelub HVP: 400 amp maximum

The OEM is responsible for wiring from the battery to the B+ terminal on the Prelub motor and for the wiring fromthe ignition switch to the timer logic module or the RPM harness. Refer to Cummins AEB 111.15 for wiringrecommendations.

The wire diagrams of the standard RPM harness are in the appendix.

Instructions to aid Installation of the HVP onto QSK60 engines with Spin-on Filters1) Installation of Bracket - Pump bracket p/n 4066169 is to be fitted to the set of 4 mounting holes on thecylinder block (2 M12 on oil pan rail and 2 M10 on cylinder block side face) that are closest to the oil filter head.The M12 capscrews (p/n 3910495) are torqued to 80Nm, and the M10 capscrews (p/n 3089016) are torqued to45Nm.

2) Installation of Fittings into HVP - Lightly lubricate the O rings of all straight thread O ring connections using15W40 oil. Install elbow p/n 3393258 into the upper supply port of the HVP Prelub. Position the elbow facingforward and tighten to 78Nm. Install elbow p/n 4065714 into the lower suction port of the HVP Prelub. Positionthe elbow so that it is facing forwards and into the cylinder block at an angle of approx. 45 degrees and tighten to101Nm. See Photo HVP (4).


3) Installation of the HVP Prelub to the Bracket - Locate the HVP Prelub unit (p/n 4065469) into the two Usaddles on the bracket, centralise and then fit the U shaped pump brackets 2 with p/n 4066180. These bracketsare secured with 4 M10 capscrews (p/n 3902460). A small amount of Loctite 641 should be applied to thecapscrew threads, and the capscrews tightened down evenly to a torque of 30Nm.

4) Installation of Supply Hose - Elbow p/n 4065496 is installed into the M33 port at the front of the lub oil filterhead to a torque of 60Nm. The elbow is positioned to point to the rear of the engine and slightly outboard. Thecheck valve assembly (p/n 4065979) is fitted onto the elbow with a torque of 47Nm. A thin coat of Loctite 641should be applied to the elbow thread prior to check valve assembly. The supply hose p/n 4066164 is installedbetween the check valve assembly and the upper HVP elbow with the hose elbow end at the HVP connection.Hose nut torque to be 190Nm. See Photos HVP 2 & 4.The hose is secured using 1 spacer p/n 3629762, 1 capscrew p/n 3904446 and 1 clip p/n 67950 which is installedonto the lower number 4 RB handhole cover.The check valve assembly is secured using 1 spacer p/n 3629762, 1 capscrew p/n 3904446 and 1 clip p/n 68189which is installed onto the lower number 3 RB handhole cover.

5) Installation of Suction Hose - Elbow p/n 3410392 is installed into the M42 port on the right bank of the oil panadapter nearest the rear of the engine. The suction hose p/n 4066166 is installed between the HVP lowerconnection and the oil pan adapter elbow. The hose is supported via a bracket p/n 109895 which is mounted ontothe underside of the oil pan adapter in a location on the 2nd capscrew rearwards from the central weep hole boss.A hose clip p/n 68189 is secured around the hose and connected to the bracket using 1 capscrew p/n 3903990and 1 nut p/n 3093828. Torque to 45Nm.


Instructions to aid conversion of QSK60 engines from Integral Prelub to HVP Prelub

1) If engine in equipped with Eliminator, see photo below for connection locations of plumbing from HVP to theengine.

2) Parts and Plugs needed for conversion from Integral Prelub to HVP Prelub:

Plugs required for removal of Integral Prelub:• Engine sump supply connection: 42mm ORB (P/N 3089023)• Eliminator pressure connection: 22mm ORB (P/N 3089238)• Integral Prelub motor pump housing (not required if Integral Prelub starter is replaced with standard 50MT

starter, P/N 3171099):Supply: 7/8-14 ORBPressure: ¾-16 ORB

View looking to the rear

Supply Connection(Elbow 3410392)

PressureConnection

HVP Pump(off-engine)


Parts required for installation of HVP:• Timer Relay (P/N 4065468)• Pressure Switch (P/N 4065465)• Wire Harness Kit (P/N 4065275)• Parts as shown per diagram below:

3) Upfit Procedure:• Remove Integral Prelub pump gears, (replace gasket) } Note: These 2 steps not required if standard• Install (2) plugs in Integral Prelub pump housing } 50MT starter is upfitted in lieu of Integral starter• Install (2) plugs in engine previous Integral Prelub connection• Remove Integral Prelub hoses• Remove Integral Prelub harness• Original 1-terminal pressure switch in flywheel housing must be replaced with new pressure switch, P/N

4065465.• Install remote HVP wiring harness kit, P/N 4065275• Install timer relay, P/N 4065468.

HVP4065469

Elbow4065714

Hose4065571

Elbow3410392

Union4065547

Elbow4065549

Check Valve4007204

Union4007207

Hose4065573

Elbow3393258

To bottom porton Eliminator

To M42sump port


Reference Documents:AEB 111.15 -- Cummins Branded Electric'sService Bulletin 3666091 -- Prelub InstallationAEB 40.12 – Cummins Prelub for K19, K38/50, and V28 Construction Engines


APPENDIX

HVP Pump

Integral Prelub Pump Motor Cut Away

Electrical Components and SensorsTimer Relay: All Systems300 Amp Fuse: Standard Prelub Systems400 Amp Fuse: High Volume Pump SystemsPrelub Pressure Switch

Chassis Mounted BracketsPump/Motor Bracket: Chassis and HVP Systems

Wire DiagramsIntegral Prelub with Single StarterIntegral Prelub with Dual StartersChassis Mounted PrelubHigh Volume Pump Prelub System


High Volume Pump (HVP) Prelub (P/N 4065469 with brackets, P/N 4007201 without brackets (QSK78))

Pump has ½”-13 terminal studs

Motor/Pump Dimensions:Length: 15 inch (381 mm)Height w/ mounting bracket (not shown): 9 inch (229 mm)Width with mounting bracket (not shown): 6 inch (152 mm)

Performance:70° F 15W-40 Oil: 30-40 gpm @ 180-230A depending on available engine port sizes.0° F 15W-40 Oil: 20-30 gpm @ 300-350A depending on available engine port sizes.

14.9645.250

6.250


Integral Prelub Pump/Motor Diagram


Timer Relay: QST30 Engine (3-sec delay) (P/N 3633715)


Timer Relay: QSK45/60/78 Engines (P/N 4065468)


300 AMP Fuse: Integral Prelub System (P/N 3633716)

400 AMP Fuse: High Volume Pump (HVP only) Prelub Systems (P/N 4007418)


Pressure Switch for QST30, QSK45/60/78 Prelub systems (P/N 4065465)


QSKV Pump/Motor Bracket Chassis Mounted Prelub and HVP(Supplier RPM P/N 102707)

Bracket for Engine-Mounted HVP Prelub Pump (1 bracket P/N 4066169, 2 brackets P/N 4066180)

4066169Bracket

2 x 4066180Brackets


Integral Prelub System - Single Starter

STARTERCRANKSOLENOID

MACHINEIGNITIONSWITCH

G

TO BATTERY "+"

BATTERY

S

MOTOR

MACHINESTARTER

RELAY

337 WH

307 OR

301 PUR

101 RD

200 BK

447 PK

PRESSURESWITCH

START

PRELUB is a trademark of RPM Industries, Inc.

Existing Ignition"Start" Wire

SWITCH / TIMER

TO BATTERY "+"

200 BK

FUSE

Integral Prelub System - Dual Starter

447 PK

200 BK

FUSE

ST

(START)

PRESSURESWITCH

STARTERCRANKSOLENOID

G

TO BATTERY "+"

BATTERY

S

MOTOR

MACHINE STARTER RELAYS

TO BATTERY "+"

G

BATTERY

S

MOTOR

CONVENTIONALSTARTERCRANKSOLENOID

301 PUR

101 RD

200 BK



337 W307 OR


SWITCH / TIMER


Chassis Mounted Standard Prelub

FUSE

447 PK

200 BKPRESSURE

SWITCH

STARTMACHINESTARTER

RELAY

TO BATTERY "+"

TO STARTER"S" TERMINAL


TO BATTERY "+"

337 WH

307 OR

101 RD

301 OR200 BK



SWITCH / TIMERASSEMBLY

HVP Prelub System

MACHINESTARTER

RELAY


EXISTINGIGNITION WIRE

TO BATTERY "+"

TO AIR ORELECTRICSTARTER

HVP UNIT

BATTERY +


ST(START)

RELAY(RUN)

PRESSURESWITCH

337 WH

307 OR SPLICE

FUSE

SWITCH/TIMER

200 BL