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 478 of 552

TM 9-2350-311-34-2

14-4 TRAVERSING MECHANISM ASSEMBLY - CONTINUED

b. Inspection and Repair

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Inspect two spur gears (4). Replace if teeth are cracked or broken.

Inspect roller bearings (6) and ball bearings (12, 22, and 25) (TM 9-214).

Inspect gearshaft (23) and bevel gear (39). If teeth are cracked or broken, replace gearshaft and bevel gear

as a matched set.

Inspect traversing mechanism upper housing (9). Replace if cracked.

Inspect setscrew (15). Replace if damaged.

inspect block (16). Replace if damaged or worn to less than 7/16 inch (11.125 mm).

Inspect ball bearings (47 and 51) (TM 9-214).

Inspect traversing mechanism lower housing (10). Replace if cracked.

Inspect gear teeth of two helical gearshafts (48 and 54.1). Replace if teeth are cracked or broken.

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

0.010 inch (0.25 mm).

Inspect helical gear (52). Replace if teeth are cracked or broken.

Inspect threads and splines of shouldered shaft (13). Repair damaged threads. Replace if splines are

cracked or broken.

Inspect helical compression spring (44). Replace if free standing length is not 2-7/8 in. (73.025mm), or if

cracked, scratched, nicked, or distorted.

14-18 Change 2