TM-9-2350-311-34-2

CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS HOWITZER, MEDIUM, SELF-PROPELLED, 155MM

TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL

SEPTEMBER 1994

TM-9-2350-311-34-2 - Page 481 of 552

TM 9-2350-311-34-2

Helical compression spring is held under compression by round nut. To avoid injury, restrain helical

compression spring while installing round nut.

Install helical compression spring (44), flat washer (43), new key washer (41) and round nut (42). Tighten

round nut until helical compression spring measures 1- 1 3/16 in. (46.037 mm).

Bend tabs of key washer (41) to secure round nut (42).

Check backlash of two helical gearshafts (48 and 54.1) with helical gear (52). Replace if backlash is greater

than 0.010 inch (0.25 mm).

Install shim(s) (40). Required shim(s) = A + 0.003 inch (0.08 mm) - MD + X; where A is stamped on travers-

ing mechanism lower housing (10), MD is stamped or etched on bevel gear (39), and X is measured at as-

sembly from top of lower housing gasket to top of shouldered shaft (13) below bevel gear.

Install bevel gear (39).

Install new key washer (37) and round nut (38).

Bend tabs of key washer (37) to secure round nut (38).

Install two new gaskets (36), left and right access covers (35) and 12 cap screws (34).

Install new lockwire (33) to secure 12 cap screws (34) on left and right access covers (35).

Install new gasket (32), (center) access cover (31) and four cap screws (30).

Install new lockwire (29) to secure four cap screws (30) on (center) access cover (31).

7

8

8.1

9

10

11

12

13

14

15

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Change 2 14-21