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 404 of 552

TM 9-2350-311-34-2

9-2

NO-BACK BEARING -CONTINUED

d. Installation

NOTE

If new shim(s) are to be installed, ensure that the required thickness was calculated. Refer to c.

assembly, step 9.

1

Install shim(s) (8) on mechanical housing (9).

2

Install pin (13) and no-back bearing (12) on shouldered shaft (2), ensuring that lower woodruff key (16) on

shouldered shaft alines with upper drive bearing (25) of no-back bearing.

3

Install woodruff key (11) and bevel gearshaft assembly (10) in mechanical housing (7), ensuring that wood-

ruff key alines with lower drive bearing (26).

4

Install mechanical housing (7) with bevel gearshaft assembly (10) in mechanical housing (9).

5

Install six cap screws (6).

NOTE

Step 5 applies to only M109A4/M109A5 howitzers.

6

Install new seal (5), new preformed packing (4), and dust protective cap (3) on shouldered shaft (2).

NOTE

To fully seat preformed packing in M109A4/M109A5 traversing mechanisms, use handwheel as-

sembly round nut to tighten dust protective cap against preformed packing. Upper woodruff key

cannot be installed otherwise.

7

Install upper woodruff key (1) in shouldered shaft (2).

9-10

Change 2