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 721 of 775

TM 9-2350-311-10

G-3

LUBRICATION INSTRUCTIONS - CONTINUED

14.

CHECK BALLS AND METERING HOLES (C) (11578385)

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.

a.

Remove setscrew (38) from bore evacuator (39)

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.

b.

Insert T-handle (40) into setscrew hole (41). Turn T-handle to engage with threads. Continue turning to depress ball

and spring.

c.

Insert pry bar (42) into hole (43). With bearing ball depressed, unscrew bore evacuator (39) and slide it forward on

cannon tube (44).

Change 2 G-17