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 465 of 775

TM 9-2350-311-10

3-6 ARMAMENT AND CAB MAINTENANCE — CONTINUED

3-6.8

Breech Mechanism — Continued

a. Disassembly — Continued

8 Remove two cap screws (14), two Iockwashers (15), and plunger assembly (16) until it clears nut (17).

Go to step 13.

NOTE

•

When plunger assembly 11580174 is lifted out and locked in place, the tip of the plunger will

provide some support in holding the housing and firing group block in place while the spindle

assembly is removed.

•

The M109A5 M284 cannon assembly has two configurations for the plunger assembly.

• Perform steps 9 and 10 for the M109A5 M284 cannon assembly containing plunger

assembly 11580174 if only the nut and spindle assembly are to be removed. If housing and

firing group block are to be removed, go to step 11.

9 Grasp spring pin (18) located on top of plunger assembly (19). Pull outward against spring (20) until slot

in plunger assembly lines up with cam plate (21).

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