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 454 of 775

TM 9-2350-311-10

3-6

ARMAMENT AND CAB MAINTENANCE — CONTINUED

3-8.7

Muzzle Brake and Bore Evacuator (11578385) — Continued

a. Removal — Continued

3

With bearing ball depressed, screw thrust collar (2) rearward to uncover machine key (4).

4

Remove machine key (4) from muzzle brake (5) and cannon tube (6).

Muzzle brake weighs approximately 350 pounds (159

personnel.

kg). Use caution to avoid injury to

5

Unscrew muzzle brake (5) until threads on muzzle brake just clear threads on cannon tube (6). Attach

sling (7) and hoist (8) to muzzle brake and remove muzzle brake from cannon tube.

NOTE

There are two setscrews at the muzzle brake end of the bore evacuator. One setscrew 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 will allow release of the bearing ball.

6

Remove thrust collar (2) from cannon tube (6), and remove setscrew (9) from bore evacuator (10).

3-54

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