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 723 of 775

TM 9-2350-311-10

G-3

LUBRICATION INSTRUCTIONS - CONTINUED

14.1.

CHECK BALLS AND METERING HOLES (C) (11580776)

NOTE

There are two setscrews on the thrust collar 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 (48.1) from thrust collar (48.2).

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.

If o-rings are damaged, notify unit maintenance.

b.

Insert T-handle (48.3) into setscrew hole (48.4). Turn T-handle to engage with threads. Continue turning to depress

ball and spring.

c.

Insert pry bar (48.5) into hole (48.6). With bearing ball depressed, unscrew thrust collar (48.2) and slide it forward

on cannon tube (48.7).

Change 2

G-18.1