MAINTENANCE OF WINCH ASSEMBLY

TM-5-3820-256-24-1 Drilling System Manual
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4-18.2.2 Disassembly. a. To replace the filter element, remove the six screws and lockwashers and remove the cap assembly (1). Remove the compression spring (2) and by-pass valve assembly (3). Remove the element (7) from the bowl assembly (8). b. Do not remove the head (5) or the bowl assembly (8) from the reservoir unless repair or replacement of either item is required or if the filter seal (6) is leaking and needs to be replaced. 4-18.2.3 Assembly. a. Before assembling the new filter, examine the by-pass valve (3), compression spring (2), and the underside of the cap assembly for evidence of any metal filings. If any are found, this may indicate a part failure in one of the pumps, motors, or cylinders. Clean the filter parts of dirt or any other particles before assembly. b. Install the new element (7) in the bowl (8). Position the bypass valve (3) and compression spring (2) on the filter and replace the cap assembly (1) on the head. Replace and tighten the six screws and lockwashers on the cap assembly. 4-19 MAINTENANCE OF WINCH ASSEMBLY 4-19.1 Winch Assembly (Figure 4-44). 4-19.1.1 Disassembly. a. Unwind all wire rope from the winch and loosen the nuts (1) to release the cable clamp and remove the wire rope from the drum. Remove the winch from its mounting. Remove the hydraulic motor. Remove drain plug (71) and drain the lubricant from the housing. b. Remove nuts (1), lockwashers (2), and cable clamp (3). Remove nuts (4, 6), lockwashers (5), and capscrews (7, 9) to separate the winch from its bracket (8) and front base angle (10) and rear base angle (11). c. Remove two nuts (12), lockwashers (13), and capscrews (14). Then remove bearing leg assembly (16). Do not remove grease fitting (15). Slide bushing (17) out of bearing leg. Remove cotter pin (18) and pivot pin (19); then remove bracket (20). Disassemble drag brake by removing nut (21), drag brake spring (22), washer (23), link (24), cotter pin (25), link pin (26), and drag brake shoe (27). Remove knob (28), stem (29), spring (30), and shifter fork (31). d. Remove two retaining rings (32) to remove clutch hub (33); then remove woodruff keys (34) and the drum (35) from the shaft. From the opposite side of the housing, remove six capscrews (36) and lockwashers (37). Then remove worm housing cover (38) and gasket (40), bushing (39) and worm gear (41) from shaft (42). 4-171

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