PAGE 15
340 REV.030926
SERVICE INSTRUCTIONS
CONTINUED
MINOR SURFACE DEFECTS WHERE SPRAG CLUTCH ENGAGES MOTOR DRIVE
SHAFT AND CONNECTING SHAFT, WILL RESULT IN BRAKE FAILURE AND ALLOW
THE LOAD TO DROP, CAUSING PROPERTY DAMAGE, SEVERE INJURY OR DEATH.
THOROUGHLY INSPECT THESE AREAS AND, IF NECESSARY, REPLACE MOTOR
DRIVE SHAFT, SPRAG CLUTCH AND CONNECTING SHAFT AS A SET.
DANGER
DAMAGED FRICTION OR DIVIDER PLATES WILL REDUCE BRAKING CAPACITY
AND ALLOW THE LOAD TO DROP, CAUSING PROPERTY DAMAGE, SEVERE
INJURY OR DEATH. SOLVENT MAY DAMAGE THE FRICTION PLATES.
DO NOT USE SOLVENT TO CLEAN THE FRICTION PLATES. PERFORM THOROUGH
INSPECTION AND, IF NECESSARY, REPLACE FRICTION AND DIVIDER PLATES AS A SET.
DANGER
NOTE:
Teflon seals, gasket seals, and ring seals in the hydraulic motor assembly are not part of the
Planematic seal kit. The motor, with the exception of the motor adaptor item 800, and the port
end cover item 870, are standard parts of the hydraulic motor, having a 3 inch gear section.
All of these parts can be ordered from PULLMASTER or Authorized Distributors/Dealers in
Canada, the United States and in most overseas areas.
REMOVAL OF HYDRAULIC MOTOR ASSEMBLY:
If disassembly of the hydraulic motor is not necessary, proceed as follows:
1) Remove 12 hex capscrews item 537, together with lockwashers item 773, from motor adaptor item 800. Since
brake springs item 752, apply pressure against inside of motor adaptor, it is recommended that hex
capscrews are unscrewed, one turn at a time, until spring pressure has been released. Complete motor
assembly, including motor adaptor, can now be removed from brake housing
2) For models with internal circulation, ensure that hole in orifice plug item 804, is clear. For models with external
brake release option, verify that shuttle item 802, moves freely.
3) Remove and discard O-ring item 801, and O-ring item 707. (O-ring item 801, seals pressure transfer hole
for automatic brake release and is situated on flange of brake housing.)
DISASSEMBLY OF BRAKE HOUSING ASSEMBLY:
Refer to PARTS REFERENCE on page 24 and BRAKE GROUP drawing G1015 on page 25.
1) Remove brake spacer item 712, from brake housing item 700.
2) Pull motor drive shaft item 730, out of brake hub assembly. Surface of motor drive shaft that engages sprag
clutch item 723, should be inspected for wear or indentations. If motor drive shaft shows any surface damage,
it should be replaced.
3) Sprag clutch aligner item 724, and sprag clutch item 723, can now be removed from bore of brake connecting
shaft item 600. Inspect both parts for wear or damage and replace if necessary.
4) Remove circlip item 721, and brake hub item 720, from connecting shaft item 600.
5) Remove 12 friction plates item 715, together with 13 divider plates item 713, and inspect for damage or wear.
Plates should be flat and smooth. Plates should not show heat discoloration. Fiber material on friction plates
should be intact and grooved. Replace plates if damaged.
