I MILANO OSTRADA BOLOGNA T - Cape Cobras · 2011. 7. 21. · OSTRADA A 1 S.S. 9 VIA EM ILIA O VEST via D. LIVING STO NE motorway exit CAMPOGALLIANO BRENNERO OSTRADA 22 NORTH MODENA

SAFIM HAS BEEN SPECIALISING IN ANALYSING ANDSOLVING BRAKING PROBLEMS IN INDUSTRIAL VEHICLES, FORK-

LIFT TRUCKS, CONSTRUCTION MACHINERY, FARMING AND

FORESTRY MACHINERY, ETC.. FOR OVER 20 YEARS.

IT HAS DESIGNED AND PRODUCED HYDRAULIC BRAKESYSTEMS AND CYLINDERS WHICH OFFER A HIGHLY

ADVANTAGEOUS ALTERNATIVE TO CONVENTIONAL BRAKE

CYLINDERS AND OTHER DEVICES REQUIRING THE INSTALLATION

OF BULKY SYSTEMS ON MACHINES.

THANKS TO ITS CONTINUOUS RESEARCH WORK INCOLLABORATION WITH THE WORLD’S LEADING CONSTRUCTORS

AND PROVEN EXPERIENCE, SAFIM IS ABLE TO OFFER HIGHLY

FEXIBLE SOLUTIONS TO THE REAL OPERATING REQUIREMENTS,

WITH IMPRESSIVE ADAPTABILITY TO THE EVOLUTION AND FUTU-

RE DEVELOPMENT OF MACHINES IN WHICH THEY ARE

INCORPORATED.

SAFIM BRAKE CYLINDERS AND HYDRAULIC BRAKESYSTEMS ARE ABLE TO OFFER MANY ADVANTAGES:

-HIGH BRAKING PRESSURES

-LOW STRAIN ON THE PEDAL (75-90% REDUCTION)

-SIMPLE HYDRAULIC SYSTEM

-COST EFFECTIVENESS AND COMPACT SIZE

-PERFECT, RELIABLE BRAKING CONTROL

-PROMPT, PROGRESSIVE BRAKING

-WIDE PRODUCT RANGE

-NO MAINTENANCE NEEDED

THANKS TO THE TECHNOLOGIES EMPLOYED AND THEHIGH DEGREE OF EXPERIENCE ACQUIRED, SAFIM IS ABLE TO

ASSURE AN UNRIVALLED RELIABILITY IN ITS PRODUCTS.

SAFIM S.p.A.

via Livingstone, 6

41100 MODENA - ITALIA

Tel (039) 059 894411

Fax (039) 059 894444

e-mail: [email protected]

http://www.safim.it

sviluppo applicazioni freni industriali

ISO 9001 certification

EXIT 16

EXIT 14

MODENAcentre direction

BOLOGNATANGENZIALE NORD

REGGIOEMILIA

MILANO

AUTOSTRADA A 1

S.S. 9

VIA EMILIA OVEST

via

D. L

IVIN

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motorway exitCAMPOGALLIANO

BRENNERO

AU

TOS

TRA

DA

A

22

NORTH MODENAmotorway exit

EXIT 15

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EXHIBITIONCENTRE

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Main features• Large displacement• High braking pressures obtained with low strain on the pedal• Compact size• Easy installation• Available both for mineral oil and brake fluid• Cost effective

Operating ranges• Braking pressure up to 150 bar• Displacement available from 8 to 35 cc.

Bra

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S6

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Main features• Easy installation and perfect integration with

the existing braking and hydraulic systems• Maximum braking sensitivity• High braking pressures obtained with low

strain on the pedal• Built-in servo brake pressure limiting valves• Available both for mineral oil and for brake fluid

Operating ranges• Braking pressure from 0 to 150 bar• Single- or double-circuit displacement from

18 to 65 cc.• Operating temperature from –20° to +90°C.

Applications• Fork-lift trucks, front-loaders, mechanical

backhoes, agricultural backhoes, etc.

Main features• Single braking element• Prompt, progressive braking• Possibility of operating the brakes of any size

vehicle• Use of the energy available in the existing hy-

draulic circuit• Possibility of having different pressures in the two

braking circuits• Accumulator charging valves for hydraulic cir-

cuits with fixed displacement and load sens-ing cylinders

• Easy assembling procedures and adjusting

Operating ranges• Braking pressure from 0 to 170 bar• Accumulator recharge pressures from 20 to 200 bar• Unlimited amount of fluid for the braking cir-

cuits

Available upon request:• Electrically controlled parking brake

operating device• Electrically, mechanically or

hydraulically controlled working brake• Electrically controlled device for

the accumulators rechargedisconnection during starts with engine off

• Built-in pressure reducing valve(for modular S6 units only)

• Electric or hydraulic inching device for vehicledrive disengagement

Applications:• For medium to large size vehicles with 1 to 4

braking circuits: front-loaders, dumpers, fork-lifttrucks, truck-mounted cranes, cement-mixertrucks, excavators, road-rollers, etc.

Main features:• Product versatility• Compound wheel cylinders (service,

parking and emergency braking) foroperating mechanical lever brakes.

• Single-acting negative cylinders

Operating ranges:• Compound cylinders: brake release

pressure from 73 to 102 bar• Operating forces from 694 to 1388 daN• Negative cylinders with brake release

pressure from 6 to 143 bar, braking forcefrom 1057 to 46 daN, operating tempera-ture from –20°C to + 90°C

• Operating temperature from –20°C to +90°C

Applications:• Parking brake operation (negative brakes)• Accelerator/clutch control.• Compound braking (service, parking,

emergency).

Main features• Brake valves operating according to CUNA

341/01 standards (Italian standards)• Brake valve operating according to French/

Swiss standards.• Mechanical or hydraulic brake valve piloting• Single-acting or compound braking cylinders

for service, parking and emergency braking

Brake system components• Valves for hydraulic braking farming

trailers• Reservoir with hand pump• Wheel cylinders• Connecting joints• Force/pressure transducers• Specific electric systems• Pressure selector valves

Applications• Hydraulic brake system for every kind

of farming tractor and trailer

• Proportional lever valve for release andmodulation of spring-type parking andemergency brakes.

• Flow dividers• Priority valves• Pressure switches• Filters (to be applied on our products)• Accumulators• Connections in general• Reservoirs (brake cylinders)• Complete pedal for operating brake

cylinders with servo control• Two –stage brake cylinders

Available upon request:• Pressure limiting valves• Slide valves for working braking• Closed centre servo brakes• Servo brakes for load sensing systems• Master cylinders without hydraulic servo control• Combination of servo brakes with brake cylinder

types for all system requirements

Applications:• Small-size self-propelled machines (mechanical

front-loaders), excavators, backhoes, etc.

sviluppo applicazioni freni industriali

MASTER CYLINDER WITH HYDRAULIC

SERVO

01.00.01

Last revision 10.01

SAFIM Via Livingstone, 6 - 41100 Modena (Italy) Tel. (059) 894411 Fax. (059) 894444 E-mail: [email protected]

MAY 2002 EDITION

Master cylinder with hydraulic servo SAFIM has been producing this type of product successfully since 1979. These devices are used for operating the brakes of industrial machines and have replaced ordinary brake pumps and other devices which used to require the installation of bulky additional systems on machines. The advantages offered by this unit are:

• high braking pressures • low pedal pressures (reduction of 75-90%) • the simplicity of hydraulic equipment • compact dimensions • perfect braking control • built-in safety valve • brake pressure limiting valves to customer

specifications. The brake cylinder and the servo are both housed in a single, compact unit; the body is in pearlitic cast iron.

The brake cylinder is available in two versions: with a step bore piston; with a conventional fixed diameter piston. Both versions have been designed for use with single or twin-circuit braking systems. The brake servo is the follower type where the pressure modulating valve is inside the piston which actuates the brake cylinder. The brake servo and the brake cylinder are coaxial and internal parts are superimposed in order to reduce the length of the unit. The two circuits are completely separate and there is therefore no danger of one circuit polluting another.

AMamei000A-200510A-EN

HYDRAULIC BRAKE SERVO

01.00.02 Last revision

10.01


This brake servo is fed by a gear pump and is usually of the open-circuit type with piston of 38/40/50/75 diameter. The actuating rod has a pressure sensitive surface which reacts proportionally to the operating pressure of the brake servo. A safety regulating valve limits the pressure and prevents excessive pressures in the braking system. The accumulator is charged with the same pressure generated by the brake servo during previous applications of the brakes and does not therefore require a regulating valve.

By using a distributor block, the brake servo can be pressured up with an accumulator and the machine can be braked with the feed pump discharged. This type of braking is not intended for use as a parking brake but is only for use during normal working operations with the driver on the vehicle. In addition to this open-centre brake servo, Safim also produces brake servos centres and for use with load-sensing circuits. Feed: 3.5/22 It. Temperature: -20° / +90°C Max. permitted pressure at discharge: 0.5 bar Max. no-load feed pressure: 1.5 bar

___________________________________________________________________________

HYDRAULIC CIRCUIT DIAGRAM OPEN-CENTRE SERVO

P: Feed pump T: Tank R1: 1st circuit reservoir R2: 2nd circuit reservoir B1: 1st circuit brake B2: 2nd circuit brake F: Master cylinder with open-centre servo

HYDRAULIC CIRCUIT DIAGRAM ACCUMULATOR ASSISTED SERVO

P: Feed pump T: Tank R1: 1st circuit reservoir R2: 2nd circuit reservoir B1: 1st circuit brake B2: 2nd circuit brake A: Accumulator L: Pressure switch S: Alarm light F: Master cylinder with accumulator assisted servo

STEP-BORE BRAKE

CYLINDER


10.01

These brake cylinders have pistons with two diameters, one larger than the other, and special valves to control cylinder operation. The larger piston pushes a large quantity of oil to the brakes but at low pressure. The valves are adjusted so that when the pressure at which the brake friction surfaces meet is reached, the larger piston is gradually deactivated and the smaller piston begins to operate. This makes it possible to obtain high braking pressures at acceptable pedal pressures. For the reasons already explained above, these pumps do not meter out a specific volume of fluid; fluid volume fed out varies according to the type of brake system, brake clearances, etc. The values given here have been calculated with the large piston at 50% of its total stroke and with the small piston at 50% of its total stroke. In the twin-circuit version, the secondary piston divides the displacement of the first circuit by 50%.

The unit is fitted horizontally with the connections pointing upwards or vertically with the hexagonal plug pointing upwards. When ordering, specify a M10 x 1 bleed valve. The cylinder can be supplied with seals for DOT3 brake fluid or seals for mineral oil (please specify when ordering). Max. braking pressure: 150 bar Operating temperature with mineral oil: -20°/ +90°C Operating temperature with brake fluid: -30°/ +100°C ORDERING: The numerical part of the order code is indicated on the pages below. This should always be followed by two letters which indicate the type of fluid used with the pump. FN indicates brake fluids and MN stands for mineral oil. The product code should be accompanied by all information necessary to identify any custom-built features characterising the pump. The Technical Office at SAFIM is responsible for defining the final code.

STEP-BORE BRAKE CYLINDER WITH SERVO – PRESSURE FORCE DIAGRAM

Ref. 12351 – 12356 Ref. 12350 – 12355

S

The values pressure-force are theoretical, because mechanical and hydraulic leaks are not being taken into account. As a reference value, the global performance is about 80%.

AFIM Via Livingstone,6 - 41100 Modena (Italy) Tel. (059) 894411 Fax. (059) 894444 E-mail: [email protected]

MASTER CYLINDER WITH SERVO


10.01

This master cylinder is the direct type, i.e. it has a single piston for both the high and low pressure phases. The special design of this unit ensures compact dimensions while ensuring that the brake circuit is kept separate from the hydraulic circuit thanks to the superimposed sealing surfaces. The air zone between the two circuits guarantees perfect separation; the air zone has a sinterized filter to the outside. Since the return springs are housed inside the pistons, this unit can operate in a horizontal position with the connections pointing upwards. (For other position please consult our Technical Office). The cylinder can be supplied with seals for DOT3 brake fluid or seals for mineral oil (please specify when ordering).

Example order: REF. 041790MN for mineral oil seals Servo setting: bar REF. 041790FN DOT3-4 brake fluid seals Servo setting: bar Maximum brake pressure: 150 bar Operating temperature: -20° / +90°C for mineral oil -30 / +100 °C for brake fluid DOT3-4 PLEASE NOTE: On the brake cylinder closing plug you can find the cylinder reference number and the kind of oil to be used in the brake cylinder.

STEP-BORE BRAKE CYLINDER WITH SERVO – PRESSURE-FORCE DIAGRAM

Ref. 13555 – 13350 Ref. 13351 – 13356

Ref. 13352 – 13357 Ref. 041145 – 041196

S

The values pressure-force are theoretical, because mechanical and hydraulic leaks are not being taken intoaccount. As a reference value, the global performance is about 80%.

AFIM Via Livingstone,6 - 41100 Modena (Italy) Tel. (059) 894411 Fax. (059) 894444 E-mail: [email protected]

Flanged stepped master cylinder with two diameter piston

01.04.00

Last revision 10.01


This brake pump has dual piston of varying diameter, with special valves fitted internally which regulate the operation of the pump. The brake fluid in the vehicle can be displaced by the larger diameter piston in large quantities, but at low pressure. The valves are regulated so that, once a pressure level has been reached at which the friction surfaces of the brakes are in line (filling pressure), the larger diameter piston is gradually inhibited, allowing the smaller diameter piston to take over. In this way, high brake pressures can be obtained without subjecting the elements to excessive stress. For the reasons already explained above, these pumps do not meter out a specific volume of fluid; fluid volume fed out varies according to the type of brake system, brake clearances, etc. FILLING PRESSURE The filling pressure P1 is the pressure corresponding to the point at which the pressure piston starts to take over from the approach piston. Point P2 is the point marking the end of the transition from one piston to the other.

FLANGED MASTER CYLINDER SAFIM WITH TWO DIAMETER PISTON Larger diameter/smaller diameter

22.2/15.6 25.4/18 27/20 31.75/23 38/25 38/25 40/30 40/30

Order part number 021688 022291 021287 022196 021255 031254 021289 031288 Total displacement (min-max) cm3

6.4-13 8.6-17.2 10.7-19.5 14.5-27 19.1-44.2 18.3-43.4 27.6-49 26.6-48

Push-rod stroke mm 34.5 35 35 36 40 40 40 40 Larger diameter mm ∅22 ∅25.4 ∅27 ∅31.75 ∅38 ∅38 ∅40 ∅40 Smaller diameter mm ∅15.6 ∅18 ∅20 ∅23 ∅25 ∅25 ∅30 ∅30 1st circuit stroke mm 34.5 35 35 36 40 22 40 20 1st circuit displacement (min-max) cm3

6.4-13 8.6-17.2 10.7-19.5 14.5-27 19.1-44.2 4.8-29.9 27.6-49 8.4-29.8

2nd circuit cylinder mm

/ / / / / ∅31.75 / ∅35

2nd circuit stroke mm / / / / / 18 / 20 2nd circuit displacement (min-max) cm3

/ / / / / 13.5 / 18.2

Maximum pressure Bar

150 150 150 150 150 150 150 150

Dimensions and optionals see page

01.04.01 01.04.02 01.04.02 01.04.03 01.04.04 01.04.04 01.04.04 01.04.04

SAFIM S6

BRAKE SYSTEM


10.01


• A single, compact unit • Positive, progressive braking • For any vehicle type or size • No need for special hydraulic circuit,

powered by vehicle’s existing circuit • Pressure differentials between brakes • For use with both negative and

positive brakes • Suitable for mixed circuits with

positive and negative brakes together

• Direct control of hydraulic or mechanical brakes

• Available in horizontal or vertical versions

• A minimum of hydraulic connections • Accumulator charging valve for load

sensing circuits • Modular assembly • Easy to adjust • Maintenance free

BRAKE SYSTEM

SAFIM S6


10.01

The new Safim S6 Brake System is a compact assembly with all brake components grouped together in a single, modular, easy to-adjust unit. Modular components mean that customers can select the unit configuration that best suits their particular needs. Safe, dependable braking in all circumstances is thus assured. The S6 is available in both horizontal and vertical versions. Both versions, whilst the same basic design, offer a choice of different configurations. The S6 is a major innovation in brake systems in that it only requires a small number of connections and only uses a small amount of power from the vehicle’s existing hydraulic circuit, the remaining power is thus available for other equipment. This innovation is made possible by the charging valve which automatically controls the flow of oil to the hydraulic accumulators.

The S6 system is suitable for mounting on medium to large sized vehicles with between 1 and 4 breaking circuits. Typical examples are: loaders, dumpers, forklift trucks, mobile cranes, cement mixers, excavators, compressors, etc… The system is designed for the direct control of mechanical or hydraulic brakes both positive and negative (pressure differentials of 1:2 and 1:4), to provide safe, responsive, and progressive braking at all times. The technical characteristics of the S6 provide increased braking power and reduced pedal pressure. Brake pressure is adjusted on the modules connected to the brake circuit. Safim supplies S6 units ready-adjusted to customer specifications. Further adjustment can easily be carried out by the customer if so desired. Fitting the S6 is simple, the unit is virtually maintenance free and Safim customer service is always to offer assistance and advice.

TYPICAL INSTALLATION

P Feed from pump B Feed to service X Parking brake X1 Pressure switch parking brake N Discharge to hydraulic oil tank R Accumulator R Accumulator R Accumulator T1 Feed to front and rear brakes T1’ Pressure switch stop lights T2 Feed to front and rear brakes T2’ Pressure switch stop lights Z Work brake cylinder F Pressure switch accumulator


BRAKE SYSTEM

SAFIM S6


10.01


The Safim S6 brake System is made up of the following modular components: A Pedal-support unit B 1st brake module C 2nd and 3rd brake modules D Accumulator charging valve E Closing flange, as alternative to charging valve F Solenoid G Work brake or inching valve

1.A. PEDAL-SUPPORT UNIT The pedal/support unit is used to secure the entire brake system to the floor of the cab. The following parameters in the unit can be regulated: - the maximum braking pressure is regulated by means of an adjustable push-rod which limits the return lever travel; - the pedal angle.

2.B.C. BRAKE MODULES These modules control the braking pressure. Each module is connected to an accumulator. The accumulators are high pressure containers fitted with a special membrane which separates the oil from the gas (nitrogen). Three threaded connectors link the module to the brakes, accumulator and stop light pressure switch. Longitudinal channelling on the modules provide the hydraulic connection with the accumulator discharge line and charging circuit. D. ACCUMULATOR CHARGING VALVE

This valve maintains the pressure of the accumulators within the range set by the vehicle manufacturer (see vehicle instruction manual). This pressure is regulated by adjusting the screw fitted at the end of the cylinder and protected by a cap nut. The accumulator charging valve can be connected in series with other appliances. The valve takes up oil fed by the feed pump and directed at the accumulators connected to the brake system, at a rate of 6.5 l/min.+/- 10%.

3.E. CLOSING FLANGE Closing flange with connectors feeding and discharging the modular brake units. To be used as an alternative to the accumulator charging valve.

4.F. SOLENOID Cartridge-type solenoids, mounted on specially designed covers on the accumulator charging valve, designed to operate the working brake and parking brake. They are used to start up the motor on no-load cycles which is particularly useful when high-capacity pumps are being used to recharge the accumulators. G. WORK BRAKE AND INCHING VALVE A cylinder fitted on horizontal S6 Brake Systems which allows the vehicle brakes (working brakes) to be activated on a continuous basis whilst the machine is in operation. The inching valve modulates the hydrostatic transmission power during the first stage of the brake pedal stroke.

SAFIM S6 BRAKE SYSTEM INSTALLATION

02.02.01

Last revision 10.01

WARNING: all connections must be made with the motor off and the hydraulic system depressurised. Before carrying out any operations with the motor running, always make sure that the discharge N and secondary service B connections are open. Working on the system with the engine running and these connectors closed may lead to serious injury to personnel and damage to equipment.

The S6 system does not present any particular installation problems. Keep the connectors and pipe (NAS) scrupolously clean; the presence of foreign bodies and impurities will cause malfunction and rapid wear of the system components.

Important : to bleed air from the system, with accumulators charged and the motor running, press the brake pedal and open the bleed valves for a few seconds. If a safety valve is fitted between the feed pump and the brake valve, it must be set at least 30 Bar above the maximum accumulator pressure. If another work port is fed by the B1, then it must be protected with its own relief valve.

Installation of horizontal brake system

Installation of vertical brake system

D irec tion in

w h ich peda l is ins ta lled

P eda l en try s lo t

The unit is introduced from below, after having removed the lateral screw securing the pedal to the return lever. N.B. : for cab floors insulated in thick rubber matting, we recommend the longer “L type” pedal. Important : to facilitate filling of the feed pump, discharge the air from the P connection or from an accumulator.

SAFIM Via Livingstone,6 - 41100 Modena (Italy) Tel. (059) 894411 Fax. (059) 894444 E-mail: [email protected] http://www.safim.it

SAFIM S6 BRAKE SYSTEM ADJUSTMENTS

02.03.01

Last revision 10.01

SAFIM usually supplies S6 units ready-calibrated to customer specifications. Should adjustment be necessary follow the instructions given below.

1. Checking and adjusting accumulator pressure

- Regulating single adjuster charging valve 10000 series. With all accumulators discharged, connect a pressure gauge (with 250 bar scale) to the accumulator coupled to the charging valve or to a pressure switch coupling. Start the engine and apply the brakes several times to cause automatic accumulator charging. Read off the minimum pressure. The distance between maximum and minimum pressure cannot be adjusted. Adjust the pressure by turning the adjuster screw (protected by a cap nut) which is on the end of the cylindrical part of the charging valve. Adjust according to the recommendations provided by the vehicle manufacturer.

- Regulating twin adjuster charging valve 11000 series. See page. 02.03.02

2. Adjusting braking pressure Connect a pressure gauge (with 250 bar scale) to a brake circuit. Apply the brakes. Braking pressure depends on pedal travel. Adjust pedal travel/braking pressure on the adjuster screw under the pedal. Follow all pressure recommendations to prevent any damage to brakes.

3. Adjusting pedal angle Loosen the bolt on the side of the pedal (10 mm hex. head) and adjust pedal angle by turning the threaded peg under the pedal heel. Tighten peg and bolt.

4. Regulating pedal stop (applying to S6 vertical model) Regulate the screw on the support below the pedal. Make sure that the pedal has adequate backlash.


SAFIM S6 BRAKE SYSTEM ADJUSTMENTS

02.03.02

Last revision 10.01

5. Checking accumulator efficiency Accumulators are precharged with nitrogen under pressure. There are two methods for checking accumulator gas pressure: a .Discharge all hydraulic oil from accumulators before checking. Check accumulator

gas pressure using suitable equipment fitted with a pressure gauge. b. Check gas pressure by checking oil pressure. Fit a pressure gauge to the

accumulator coupling pipe and load the accumulators. Switch off the engine and discharge the accumulators either by applying the brakes several times or by loosening the connection. Pressure will begin to drop slowly and then suddenly drop to zero. The pressure reading given just before pressure suddenly drops to zero is the accumulator gas precharge pressure.

On systems with three accumulators the check should start at the accumulator mounted on the charging valve via connections R or F. In order to control the accumulator in the brake circuits R1, R2, either discharge or disconnect the accumulator from the connected R-F charging valve.

6. Adjusting pressure switches Increase pressure to the accumulators until the dashboard warning light comes on and then turn the adjuster screw in the direction desired. Turn clockwise to make the warning light go out; turn anti-clockwise to make the warning light come on. Correct adjustment is obtained when, with the warning light on, it is possible to still apply the brakes 4 or 5 times.

SAVE LEGAL PROVISIONS TO THE CONTRARY, THE BRAKE SYSTEM HAS BEEN CORRECTLY REGULATED IF THE BRAKE CAN BE APPLIED 6 OR 7 OR MORE TIMES AFTER THE INDICATOR LAMP HAS COME ON.


REGULATION OF TWIN-SCREW ACCUMULATOR CHARGER

VALVE SERIES 11000

02.03.03

Last revision 10.01

Regulation of twin-screw accumulator charger valve Series 11000. The accumulator charger valve series 11000 with twin coaxial adjusting screws is used to regulate the recharge point and maximum pressure of an accumulator within a range varying between +10% and +35% of the recharge pressure. Screw A regulates the recharge pressure of the accumulator (minimum pressure) readings, rotate adjusting screws A and B in a clockwise direction. A pressure switch should be connected to either outlet R or F before the pressure readings are regulated. When the valve is powered (motor on), operate the brake pedal to reduce the pressure of the oil in the accumulator and locate the recharge point on the pressure gauge; alter the position of the adjusting screw A so that it corresponds to the desired value and secure the screw with the nut. Regulate with the screw completely tightened and then loosen until the pressure rises to the desired level. To improve the functioning of the valve, the maximum pressure must be at least 5-8 Bar more than the pressure read with screw B tightened. It is important to fit stop C on the adjusting screw in order to prevent screw A from tightening excessively and thereby blocking the pump.


S6 BRAKE SYSTEM

TROUBLE SHOOTING

02.04.01

Last revision 10.01

PROBLEM CAUSE SOLUTION

Braking sharp and sudden.

Faulty pressure adjustment (See instruction manual).

Reduce the pressure by turning the adjuster under the pedal while checking pressure with gauge.

Insufficient braking.

Faulty pressure adjustment (See instruction manual).

Raise the pressure by turning the adjuster under the pedal while checking pressure with gauge.

IMPORTANT: Do not exceed the permitted brake pressures.

Brake feed and discharge rate is insufficient.

Check that the diameter of the brake pipes is large enough in relation to length and fluid capacity.

Brake operation and release is delayed.

Hydraulic fluid viscosity too high.

Drain and fill system with correct viscosity fluid.

S6 System discharge is faulty.

The system is not discharging freely and the pressure is feeding back to the brakes.

The brakes stay on.

Brake pedal does not return.

Check the pedal stop adjuster; there should be a little free play before the pedal begins to operate the piston.

On horizontal versions, remove the front plug and remove any dirt which may have built up in the cavity under the pedal.

Dashboard warning light does not light up or remains on all the time.

Pressure switch setting is faulty.

Check the pressure switch on the charge valve. Adjust to a value which is below the minimum accumulator pressure but high enough to ensure 3 or 4 brake applications once the warning light comes on.

Brake pressure not uniform

The accumulator minimum pressure is lower than the maximum brake pressure.

Check the accumulator pressure: minimum acc. pressure should be greater than max. brake pressure. Set the correct pressure by turning the adjuster on the cylindrical end of the accumulator charging valve.


S6 BRAKE SYSTEM

TROUBLE SHOOTING

02.04.02

Last revision 10.01

PROBLEM CAUSE SOLUTION

Nitrogen precharging of accumulators too high or too low.

Drain the oil from the accumulators and check the nitrogen pressure.

Recharge following the instructions and specification given in the marker’s manual.

Nitrogen pressure of the last oil out of the accumulator.

Continuous recharging of accumulators.

Brake capacity too great for accumulator volume installed.

Check brake adjustment and/or fit accumulators with sufficient volume.

Feed pump continuosly under pressure.

Check the pump. Repair or replace. Feed pump continuosly under pressure.

Dirt in the valve. Thoroughly check the valve. Dismantle and clean if necessary. Parts should move smoothly. Seals and seal locations should not be damaged.

Check that all connections are properly tightened and are not leaking.

Accumulators will not charge.

Foreign body is jamming the priority valve.

Check that all parts move smoothly; check the infeed valve in particular. Dismantle and clean if necessary.

Check the hydraulic connections; tighten if necessary and cure any leaks.

If the accumulator charge valve has been dismantled or overhauled, check that the stop ring on the piston in front of the feed connection has been refitted in the correct position.

Knocking can be felt at pedal.

Sudden sharp variations in discharge pressure.

Brake discharge flow too high.

Increase the diameter of the discharge pipe or fit an indipendent discharge at the pedal. Consult Safim.


BRAKE CYLINDERS

AND ACCESSORIES


10.01

SAFIM Via Livingstone, 6 - 41100 Modena (Italy)

• MULTI-FUNCTION

CYLINDERS (For service, parking and emergency braking)

• PARKING SPRING CYLINDER

• SLAVE CYLINDER • PROPORTIONAL VALVE • PRIORITY VALVE

• STEERING VALVE • 3 WAY CONTROL VALVE • ACCUMULATORS

Tel. (059) 894411 Fax. (059) 894444 E-mail: [email protected]

FLOW DIVIDER

05.01.01

Last revision 10.01

This kind of valve splits input flow either into equal parts or into different proportions with a fixed ratio. Flow dividers have different sizes according to their application fields, solely depending on input flow ranges.

ORDER EXAMPLE : 201064/12 Input flow (P)

lit/min Flow dividing valve

reference From 5 to 12 201064/5 From 8 to 20 201064/8

From 12 to 30 201064/12 From 16 to 40 201064/16 From 20 to 50 201064/20

Flow dividing valve with flow in P from 12 to 30 l/min.

ISO SYMBOL

P = Input flow U = Flow to services

PERFORMANCE:

Max inlet flow 40 l/min Max pressure 210 bar

Temperature -20° / + 90 °C

Flow ratings stated were recorded according to some tests’ results carried out on a series of valves using mineral based hydraulic oil with 3,5 E viscosity at a temperature of 40° C.

SAFIM Via Livingstone,6 - 41100 Modena (Italy) Tel. (059) 894411 Fax. (059) 894444 E-mail: [email protected]

S.p.A SVILUPPO APPLICAZIONI FRENI INDUSTRIALI

ACCUMULATOR 0.75 Litres

05.05.01

Last revision 17.10.2005

REF.:

MO15733/XX DESCRIPTION:

ACCUMULATOR SAIP LA 0.75L M18X1,5 L ECO T.XX BAR

VOLUME: 0.75 Litres

MAX OPERATIONAL PRESSURE: 210 Bar

MAX PRESSURE RATIO ALLOWED: 4:1

OPERATIONAL TEMPERATURE: From -35°C to +130°C

MEMBRANE MATERIAL: ECO

MANUFACTURE: Forged steel screwed in housing OIL CONNECTION JOINT: M18x1.5

NITROGEN RECHARGE JOINT: 5/8 UNF

PAINTING: ANTIRUST PAINT

MEMBRANE REPLACEMENT: POSSIBLE

WEIGHT: 4.5 Kg

DRAWING:

A=200 φB=65 φD=116

XX: Nitrogen pre-charge calibration

SAFIM Via Livingstone, 6 - 41100 Modena (Italy) Tel. (0039) 059 894411 Fax. (0039) 059 894444 E-mail: [email protected]



05.05.02


REF.:


ACCUMULATOR SAIP LA 1.5L M18X1,5 L ECO T.XX BAR

VOLUME: 1.5 Litres

MAX OPERATING PRESSURE: 210 Bar


OPERATING TEMPERATURE: From -35°C to +130°C


MANUFACTURE: Forged steel screwed in housing OIL CONNECTION JOINT: M18x1.5

NITROGEN RECHARGE JOINT: 5/8 UNF


MEMBRANE REPLACEMENT: POSSIBLE (SG12090)

WEIGHT: 5.6 Kg

DRAWING:

A=290 φB=65 φD=116





05.05.03


REF.:


ACCUMULATOR SAIP LAV 0.35L M18X1,5 L ECO T.XX BAR

VOLUME: 0.35 Litres





MANUFACTURE: Two forged steel screwed in housings OIL CONNECTION JOINT: M18x1.5

NITROGEN RECHARGE JOINT: M28x1.5



WEIGHT: 2.6 Kg

DRAWING:

A=160 φB=94 φD=99





05.05.04


REF.:



VOLUME: 0.5 Litres









WEIGHT: 3.6 Kg

DRAWING:

A=175 φB=94 φD=116





05.05.05


REF.:



VOLUME: 0.75 Litres

MAX OPERATIONAL PRESSURE: 210 Bar MAX PRESSURE RATIO ALLOWED: 6:1







WEIGHT: 5.6 Kg

DRAWING:

A=190 φB=115 φD=137





05.05.06


REF.:



VOLUME: 1.5 Litres

MAX OPERATIONAL PRESSURE: 210 Bar MAX PRESSURE RATIO ALLOWED: 6:1




NITROGEN PRECHARGE JOINT: M28x1.5



WEIGHT: 9.4 Kg

DRAWING:

A=290 φB=120 φD=137



Documents

I MILANO OSTRADA BOLOGNA T - Cape Cobras · 2011. 7. 21. · OSTRADA A 1 S.S. 9 VIA EM ILIA O VEST via D. LIVING STO NE motorway exit CAMPOGALLIANO BRENNERO OSTRADA 22 NORTH MODENA