TM-9-1240-401-34-P
TELESCOPE MOUNT M146: M118A2 AND M118A3; TELESCOPE MOUNT M145: M145A1; PANORAMIC TELESCOPE: M117 AND M117A2; FIRE CONTROL QUADRANT: M15; PERISCOPE: M42
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
JULY 1993
TM-9-1240-401-34-P - Page 93 of 590
3-35
TM 9-1240-401-34&P
7
8
9
10
11
12
13
14
15
16
17
18
Loosen cap screw (11) and remove nut (12) and
ring spacer (13).
Carefully separate rear housing (14) from eyepiece
arm (3).
Remove lock-release lever and bellows assembly
(ref. para 3-13).
Remove arm ratchet (15), shuttle (16), and spring
washer (17) from eyepiece arm (3).
Remove seal (18), shim (19), and protective cup
(20) from eyepiece arm (3). Discard shim.
Remove two cotter pins (21 ) and two flat washers
(22). Remove two shouldered pins (23) and two
springs (24) from rear housing (14). Discard cotter
pins.
Remove preformed packing (25) from groove in
rear housing (14). Discard preformed packing.
Scribe a reference mark on fried ratchet (26) and
rear housing (14).
Remove six cap screws (27) and six Iockwashers
(28) from fixed ratchet (26). Discard lockwashers.
Remove fixed ratchet (26), spacer (29), and re-
maining section of seal (18).
Remove preformed packing (30) from remaining
section of seal (18). Discard preformed packing.
Remove two headless straight pins (31) only if
damaged.
b. Repair
1 Remove corrosion, grease, and dirt from all parts.
Refer to TM 9-254 for cleaning instructions.
2 Visually inspect for missing or damaged parts.
3 Repair or replace parts in accordance with author-
ized parts listed in appendix D.
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