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 463 of 775

TM 9-2350-311-10

3-6 ARMAMENT AND CAB MAINTENANCE — CONTINUED

3-6.8

Breech Mechanism — Continued

a. Disassembly—Continued

3

4

NOTE

Use clean rag (item 35, Appx D) to catch stop plate and rack springs.

With breechblock closed, drive rack plate (4) rearward with hammer. Stop plate (5) and rack springs (6)

will now pop out.

NOTE

Adjuster may have lugs for an adjustable wrench or holes for a spanner wrench.

Release pre-load on closing spring using adjustable wrench or spanner wrench. Apply clockwise

pressure on adjuster (7) and depress adjuster plunger (8). Rotate adjuster slowly counterclockwise until

all torque has been relieved.

3-59