3-6. REPAIR.
3-7. Repair of the hoist unit consists of inspection and checkout to locate and identify defective parts,
disassembly to the extent required to remove these parts, installation of new parts, and reassembly. Refer
to the exploded view illustration, figure 4, for parts identification during the disassembly/assembly
procedures.
3-8. DISASSEMBLY. Refer to figure 4 and proceed as follows:
1. Disengage clips (11) and retaining pins (9) and remove telescoping legs (2). If required, remove
plugs (1) from end of legs (2).
2. Remove screws (6), nuts (8) and flat washers (7). Remove braces (4 and 5). Disengage legs
from sockets in body (31).
3. Remove screws (13), washers (14), nuts (15), and lift off cover (12).
4. Remove retaining ring (20) and pull off worm wheel (21) and remove key (22).
5. Tap lightly with mallet and wooden drift from worm wheel end to drive out shaft (24) with bush-
ing (35) and retaining ring (25) in place. Bushing (23) may now be removed from body (31).
6. Remove screws (32), washers (33) and nuts (34) to free bearing cap. Remove shaft (16), bushing
(17), worm gear (18) and key (19). Remove flanged bushing (36).
7. Unwind and disconnect wire rope assembly (26) from drum (27). If necessary for replacement,
remove bolts (28), washers (29), and bearings (30) from drum (27).
-7. ASSEMBLY. Refer to figure 4 and proceed as follows:
1. Install bearings (30) in drum (27), and secure with bolts (28) and washers (29).
2. Install bushing (35) in idler end of body (31). Install square shaft (24) through drive end bore of
body, passing it through the drum (27) and into the idler end bushing (35). Install retaining ring (25).
3. Install bushing (23) over drive end of square shaft. Install worm wheel (21) and key (22) on end
of shaft, and secure by installing retaining ring (20).
4. Install flanged bushing (36) into body assembly (31). Assemble gear (18) and key (19) over shaft
(16). Slip bushing (17) over end of shaft (16), and install the worm wheel and shaft into body assembly
(31). Install screws (32), washers (33), and nuts (34) to secure bearing cap.
5. Lubricate shaft, wire rope, and worm gears in accordance with figure 3.
6. Install cover (12), and secure with screws (13), washers (14) and nuts (15).
7. Slip legs (3) into body sockets. Install braces (4 and 5), and retaining pin assemblies (9) and secure
braces with screws (6), washers (7), and nuts (8).
8. Install telescoping legs (2) and secure in position inside legs (3) by inserting retaining pins (9)
through both legs, and securing with clips (11).
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