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TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download

Page 568 of 828

TM 9–2350–311–20–2 14–4 14–1 GUNNER’S ESCAPE HATCH (UNMODIFIED) — CONTINUED b. Disassembly NOTE Some vehicles do not have bumper. 1 If present, remove bumper (11) on gunner’s escape hatch (1) by unscrewing. NOTE Depending on which configuration of the gunner’s escape hatch is being disassembled, perform either step 2 or step 3. 2 Remove two cotter pins (12), two headed straight pins (13), bumper (14), pawl (15), and torsion helical spring (16) from cab roof. Discard cotter pins. 2 3 Remove two retaining rings (17), headless grooved pin (18), pawl (19), and torsion helical spring (20) from cab roof. Discard retaining rings. 4 Remove two cap screws (21), plate spacer (22), and plate spacer(s) (23) from inside roof of cab. 5 Remove and discard seal (24) from gunner’s escape hatch (1). NOTE Depending on which configuration of the gunner’s escape hatch is being disassembled, perform either step 6 or step 7. 6 Remove self-locking nut (25), flat washer (26), and door handle (27) from door handle mounting (28). Re- move knob (29), compression helical spring (30), and threaded straight pin (31) from door handle (27). Re- move two cap screws (32), door handle mounting, and plate spacer (33). Discard self-locking nut. 7 Remove self-locking nut (34), flat washer (35), lock-release lever (36), and thrust washer bearing (37) from shoulder bolt (38). Remove shoulder bolt, thrust washer bearing (39), preformed packing (40), and sleeve bearing (41). Discard self-locking nut and preformed packing. c. Assembly NOTE Depending on which configuration of the gunner’s escape hatch is being assembled, if step 1 is per- formed skip steps 2 through 4. 1 Install sleeve bearing (41), new preformed packing (40), thrust washer bearing (39), and shoulder bolt (38). Install thrust washer bearing (37), lock-release lever (36), flat washer (35), and new self-locking nut (34) onto shoulder bolt (38). 2 Apply sealing compound (item 30, Appx D), to threads of knob (29). Attach compression helical spring (30) and knob to door handle (27) using threaded straight pin (31). 3 Install door handle (27), flat washer (26), and new self-locking nut (25) on door handle mounting (28).