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FIG. 39 CAPSTAN WINCH
1—Cover Plate Gasket
12—Filler Plug
2—Gear Box
13— Worm Shaft Oil Seal
3—Capstan Shaft Grease Fitting
14—Worm Shaft Needle Bearing
4 —Capstan Shaft Thrust Washer
15—Worm and Gear Set
5—Capstan Shaft Retaining Washer
1 6—Worm Shaft Ball Bearing
6—Capstan Shaft Screw Lockwasher
17— Bearing Retainer Cap Gasket
7—-Capstan Shaft Screw
18 —Bearing Retainer Cap
8—Cover Screw
19—Gear Box Cover Plate Screw Lockwasher
9 —Cover Screw Lockwasher
20— Gear Box Cover Plate Screw
10 —Capstan Shaft Bushing (Upper)
21—Cover Plate
11—Capstan Shaft Bushing (Lower)
22 —Drain Plug
CAPSTAN WINCH.
The capstan winch is designed for 5000 lb. (2268 Kg.) pull, using either 3/4" (19 mm.) or 1” (25 mm.) manila rope. The worm
gears have a ratio of 75 to 1 which provides a rope speed of 19 feet per minute (5.8 m./min.) with an engine speed of 1200
rpm. A shift lever is mounted on the assembly for engagement control. Engage the drive with the engine idling only and
without load; limit the engine speed to 1200 rpm.
Lubrication is important because the parts must withstand high pressures when operating at maximum pull. Filler and drain
plugs are provided in the gear housing with an oil level stick on the filler plug. The oil capacity is one quart of SAE 90 gear oil
in Summer and SAE 80 in Winter. Change the oil twice each year—in Fall and Spring.
Hydraulic fitting No. 3, Fig. 39, indicated by the arrow cast on the gear box, is provided to lubricate the capstan spindle. To
lubricate, align the opening in the capstan with arrow. Use chassis lubricant to lubricate the spindle, also lubricate the rope
roller at each end and the shift rail and the drive shaft bushing in the winch drive support bracket mounted on the front of the
engine. Use an oil can to lubricate the winch drive universal joints.
A cotter pin is used to pin the winch drive shaft to the universal joint at the engine end and acts as a shear pin to prevent
overloading. Should this pin shear off, be sure to replace it with a cotter pin of the same size. Do not replace it with a solid pin
or drill the hole oversize for a larger pin.
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