PAGE 17
271 REV.970407
SERVICE INSTRUCTIONS CONTINUED
INCORRECT ASSEMBLY OF THE FRICTION PLATE AND DIVIDER PLATE
STACK WILL REDUCE BRAKING CAPACITY AND ALLOW THE LOAD
TO DROP, CAUSING PROPERTY DAMAGE, SEVERE INJURY OR
DEATH. REASSEMBLE PER INSTRUCTIONS
DANGER
6) Verify planet hub stopper, item 402, is installed on planet hub.
7) Insert primary planet hub assembly into cable drum. Ensure that the final sungear, item 340, is fully engaged
with final planet gears, item 320.
8) Install primary sungear, item 440.
9) Install new, well-greased O-ring, item 539, onto bearing flange, item 530. Lower brake housing, item 700,
complete with bearing flange assembly, into cable drum. To fasten bearing flange to cable drum, align holes
in the bearing flange with threaded holes in the cable drum. Install six capscrews, item 537, and lockwashers,
item 541, through access opening in brake housing.
10) Use eight capscrews, item 971, and lockwashers, item 973, to secure tie bars, item 970.
11) Install pipe plug, item 503, into cable drum.
REASSEMBLY OF BRAKE HOUSING ASSEMBLY
Reassemble brake housing assembly by reversing the disassembly procedure:
1) Press needle bearing, item 733, into brake housing bore.
2) Press new, well-greased oil seal, item 711, and back-up washer, item 710, into brake housing bore.
3) Install sprag clutch, item 723, and sprag clutch spacer, item 726, into bore of brake hub, item 720. Position sprag
clutch aligners, item 722 and 724, and support washer, item 717, on either side of brake hub. Carefully slide
motor drive shaft, item 730, into brake hub assembly and secure with circlip, item 727.
IMPORTANT: For proper brake function, verify that the brake hub rotation is correct. When
viewed from the motor end, the motor drive shaft of a counterclockwise hoisting winch
must turn freely clockwise and lock in the counterclockwise direction.
4) Install motor drive shaft assembly, carefully twisting shoulder of shaft through oil seal, item 711. Ensure that
oil seal is not damaged as motor drive shaft is installed.
5) Install brake spacer, item 712, into brake housing, item 700. Starting and finishing with divider plate, alternately
install five divider plates, item 714, and four friction plates, item 715.
6) Install new, well-greased O-rings, item 751 and 753, into piston glands, item 750. Carefully install brake piston
in brake housing.
7) Install 10 brake springs, item 752, into the 12 holes of brake piston, leaving two holes vacant opposite each
other.
8) Use grease to temporarily hold a new O-ring, item 801, into recess on the flange of motor adapter, item 800.
Install new, well-greased O-ring item 707, onto motor adapter pilot.
9) Position motor adapter, with brake release pressure transfer holes of motor adapter and brake housing aligned.
Tighten 12 capscrews, item 821, and lockwashers, item 823, one turn at a time to evenly compress springs.
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