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 453 of 775

3-6

ARMAMENT AND CAB MAINTENANCE — CONTINUED

3-8.7

Muzzle Brake and Bore Evacuator (11578385)

TM 9-2350-311-10

a. Removal

NOTE

•

Visually inspect muzzle brake. If any cracks exceed 1 inch (2.54 cm) in length, muzzle brake

is unserviceable. Notify unit maintenance for replacement.

•

There are two setscrews in the thrust collar. One is staked in place and should not be

removed. It holds the bearing ball and spring in place. The second setscrew is not staked.

Removal of this one allows access to release the bearing ball.

Remove setscrew (1) from thrust collar (2).

NOTE

•

If T-handle is not available, a screwdriver can be used to depress bearing ball.

•

If bearing ball is stuck or spring appears broken, notify unit maintenance.

2

Insert T-handle (3) into setscrew (1) hole. Turn T-handle to engage with threads. Continue turning to

depress bearing ball and spring (not shown).

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