Some Multi disk Brakes - AUSCO - #1

Ap«@® BRAKE NUMBER 30070 SERVICE NOTES

ECO 23875 REV H

THE MULTI-DISC BRAKE IS A SPRING-APPLIED, HYDRAULICALLY RELEASED BRAKE. HYDRAULIC PRESSURE IS REQUIRED TO RELEASE OR 'HOLD OFF" THE BRAKE. NORMAL OPERATION IS TO HAVE THE BRAKE PRESSURIZED IN THE RELEASED POSITION WITH THE VEHICLE HYDRAULIC SYSTEM RUNNING. ANY FUNCTION WHICH REDUCES THE HYDRAULIC SYSTEM BELOW THE RELEASE PRESSURE OF THE BRAKE WILL CAUSE THE BRAKE TO BE APPLIED.

CAUTION:

IMPORTANT: THERE MAY BE MORE PARTS IN A SERVICE KIT THAN YOUR BRAKE REQUIRES. CHECK THE PARTS LIST CAREFULLY FOR THE EXACT QUANTITY. SPACE THE SPRINGS AS SHOWN ON THE SPRING ORIENTATION VIEW.

USE THE REVERSE OF THE DISASSEMBLY PROCEDURE WITH THE FOLLOWING NOTES AND ADDITIONS:

1. WORN AND DAMAGED O-RINGS AND BACKUP

RINGS MUST BE REPLACED PRIOR TO RE-ASSEMBLY.

2. LUBRICATE THE PISTON BORE OF THE POWER PLATE, THE PISTON, AND THE O-RINGS WITH SYSTEM HYDRAULIC FLUID PRIOR TO RE-ASSEMBLY.

3. PISTON ASSEMBLY:

ASSEMBLE PIST6N INTO POWER PLATE USING A SHOP PRESS. TAKE CARE NOT TO DAMAGE THE O-RING OR TEFLON BACKUP RINGS. VISUALLY ALIGN THE CENTER OF THE CUTOUTS IN THE PISTON WITH THE TOROUE PIN HOLES IN THE POWER PLATE. CAUTION: THE DEPTH THE PISTON IS INSTALLED INTO THE POWER PLATE IS CRITICAL. THE SURFACE OF THE PISTON AT THE CUTOUTS MUST BE FLUSH TO 0.120 BELOW THE SURFACE OF THE POWER PLATE. OR PISTON MAY COCK RESULTING IN A COMPLETE LOSS OF BRAKING.

4. BEARING ASSFMBIY:

USE A SHOP PRESS TO PRESS THE BEARING ONTO

THE SHAFT. PRESS ONLY ON THE INNER RACE OF THE

BEARING. BEARING IS A SLIP FIT TO THE HOUSING.

5. LIP SEAL ASSEMBLY:

LIP OF SEAL MUST FACE AWAY FROM THE BEARING. SEE CUTAWAY VIEW FOR SEAL ORIENTATION DETAIL.

FOR CORRECT OPERATION, HYDRAULIC PRESSURE TO THE BRAKE MUST FALL TO ZERO PSI. ANY RESIDUAL BACK PRESSURE APPLIED TO THE BRAKE WILL DEGRADE FUNCTION AND MAY RESULT IN A HAZARDOUS CONDITION.

1. ASSEMBLE BRAKE BETWEEN MOTOR AND GEARBOX. PLACE MOUNTING GASKETS ON THE MOUNTING FACES BEFORE ASSEMBLY. IF NEEDED, BRAKE SHAFT CAN BE ROTATED BY APPLYING HYDRAULIC PRESSURE TO THE PISTON INLET PORT.

2. INSERT FOUR 3/4' DIA. BOLTS (GRADE 8) THROUGH THE MOTOR FLANGE, THE GASKET, AND INTO THE THREADED HOLES IN THE GEAR REDUCER. MAKE SURE THAT THE BOLTS ARE NOT TOO LONG, SO THEY DO NOT BOTTOM OUT IN THE THREADED HOLES OF THE GEAR REDUCER.

3. TO PREVENT BINDING, RUN THE BOLTS IN ALTERNATELY UNTIL SNUG. TOROUE BOLTS TO 280-300 FT.-LBS.

NOTE: THE SHAFTS MUST SLIDE TOGETHER FREELY. DO NOT USE THE BOLTS TO FORCE THEM TOGEHER. A. WITH MOTOR AND BRAKE BOLTED TOGETHER INTO POSITION, CONNECT INLET HYDRAULIC LINE. BRAKE INLET IS 3/8' LINE STRAIGHT THREAD O-RING BOSS (9/16-18 UNF).

1. DISASSEMBLE IN THE FOLLOWING ORDER: BOLTS (ALTERNATELY), POWER PLATE, GASKET, STATIONARY DISCS,

ROTATING DISCS, PRIMARY DISC, TOROUE PINS, COMPRESSION SPRINGS, AND SPRING RETAINER.

2. FURTHER DISASSEMBLY IS NOT RECOMMENDED AND SHOULD NOT BE ATTEMPTED UNLESS NECESSARY TO REPLACE THE BEARING, THE SEAL, OR THE SHAFT.

NOTE: IF THE BEARING AND SEAL ARE REMOVED FOR ANY REASON, BOTH MUST BE REPLACED. 2a. REMOVE SNAP RINGS AS NEEDED. 2b. SEAL CAN BE REMOVED BY PRYING IT OUT WITH AN APPROPRIATE TOOL. TAKE CARE NOT TO DAMAGE THE BORE. 2c. SHAFT CAN BE REMOVED BY PRESSING IT OUT WITH A SHOP PRESS.

3. REMOVE THE PISTON FROM THE POWER PLATE BY INTRODUCING LOW PRESSURE AIR (IS psi) INTO THE HYDRAULIC INLET. MAKE SURE THE PISTON IS DIRECTED AWAY FROM THE OPERATOR. DO NOT REMOVE O-RINGS AND BACKUP RINGS FROM THE O.D. AND I.D. GROOVES OF THE PISTON UNLESS REPLACEMENT

IS NECESSARY, BECAUSE THEY WILL BE DAMAGED.

6. ROTATING. STATIONARY AND PRIMARY RISC ASSFMBIY-

ROTATING DISC MUST BE CLEAN I DRY. THE LINING MATERIAL AND MATING SURFACES OF THE STATIONARY DISCS MUST BE THOROUGHLY CLEAN AND FREE FROM DEBRIS. WORN OR SCARRED ROTATING DISCS MUST BE REPLACED. PLACE SEPERATOR SPRING BETWEEN THE STATIONARY DISCS ON TOROUE.

7. INSTALL BOLTS IN THE POWER PLATE. TIGHTEN

SEQUENTIALLY ONE TURN AT A TIME UNTIL POWER PLATE IS PROPERLY SEATED. TORQUE BOLTS TO 115-135 FT-LBS.

BEARING KIT: PK - 690 - INCLUDES SEALS, RETAINING RINGS, AND BEARINGS.

STACK KIT: PK - 689 - INCLUDES TOROUE PINS, PRIMARY, STATIONARY, ROTATING DISCS AND COMPRESSION SPRINGS.

O-RING KIT: PK - 688

- INCLUDES O-RINGS, BACKUP RINGS, AND INTERNAL GASKET.

- INCLUDES EXTERIOR GASKFT(S)._

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REF

GENERAL ASSEMBLY VIEW 800 1

GASKET KIT: PK - 691