TM-9-2350-311-10

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 474 of 775

TM 9-2350-311-10

3-6 ARMAMENT AND CAB MAINTENANCE — CONTINUED

3-6.8

Breech Mechanism —Continued

b. inspection of Spindle Assembly Components — Continued

3 Gouges in surface between obturator pad (36) and retaining rings (34 and 37) mating surfaces are

normal and will not hinder operation, unless gouging is over 50% of obturator pad.

4 If there is evidence of leakage past breech ring assembly, replace obturator pad (36).

5 Inspect spindle (32) and retaining rings (34 and 37) for burrs or cracks. If burrs or cracks are present,

notify unit maintenance.

3-70