PAGE 19
SERVICE INSTRUCTIONS CONTINUED
5) Inspect three final planet gears, item 320, for damage or wear. If necessary to remove final planet gears,
remove circlip, item 311, and press planet pin, item 310, out of planet hub, item 300. Inspect loose rollers,
item 323, and two thrust washers, item 321, and replace if damaged.
DISASSEMBLY OF PRIMARY DRIVE AND CABLE DRUM ASSEMBLY:
For ease of working on remainder of unit, set winch upright on final drive housing.
1) Remove the two winch base halves, item 550 and 552, by removing the 28 hex capscrews, item 551, and
lockwashers, item 553.
2) Remove access plug, item 734, using a 1/2-13NC bolt (motor adaptor bolt, item 821, is suitable), from inside
brake housing and discard O-ring, item 735.
3) Remove six hex capscrews, item 537, with lockwashers, item 541, from bearing flange, item 530, by rotating
brake housing until access hole is over top.
4) Lift brake housing, together with the bearing flange and primary planet hub assembly, out of cable drum, item
500, and discard O-ring, item 539.
5)
Remove retaining ring, item 401, and remove primary planet hub assembly from inside internal gear, item 430.
6) Inspect three primary planet gears, item 420, for damage or wear. If necessary to remove primary planet
gears, remove circlip, item 411, and press planet pin, item 410, out of planet hub, item 400. Inspect loose
rollers, item 423, and two thrust washers, item 421, and replace if damaged.
7) Remove primary sungear, item 440, from center of connecting shaft, item 600.
8) Remove circlip, item 431, and internal gear, item 430, from connecting shaft spline.
9) Remove and inspect two thrust washers, item 433, and thrust bearing, item 435. Replace if cracked or
otherwise damaged.
10) Connecting shaft, item 600, can now be pulled out of brake housing. Remove and inspect two thrust washers,
item 615, and thrust bearing, item 617. Replace if cracked or otherwise damaged.
11) Remove sprag clutch aligner, item 677, and sprag clutch, item 672, from connecting shaft, item 600.
12) Remove needle bearing, item 603, inspect and replace if damaged.
13)
Remove and discard oil seal, item 607, and if present, backup washer, item 606, from inside of connecting shaft.
14) Remove sprag clutch aligner, item 722, from outside of connecting shaft. Remove brake hub, item 720, sprag
clutch, item 723, and sprag clutch aligner, item 724. Thoroughly inspect surfaces where sprag clutches ride
on and in connecting shaft. If damaged or indented, connecting shaft must be replaced.
MINOR SURFACE DEFECTS WHERE THE SPRAG CLUTCH ENGAGES THE
CONNECTING SHAFT AND BRAKE HUB, 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 BRAKE HUB,
SPRAG CLUTCH AND CONNECTING SHAFT AS A SET.
313 REV.970901
DANGER
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