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 149 of 775

TM 9--2350--311--10

Change 6

2--57

Table 2--1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES

FOR M109 SELF-PROPELLED HOWITZER — CONTINUED

Location

Item

No.

Not Fully Mission

Capable If:

Crewmember

Procedure

Item to Check/

Service

Interval

37

After

Cannon Tube And

Muzzle Brake

CHIEF OF SECTION

a. After firing, check muzzle brake (1) for cracks.

Any cracks in

muzzle brake (1)

are over 1 inch

(2.54 cm) long.

b. Ensure that muzzle brake key (2) is partly cov-

ered by thrust collar (3).

Muzzle brake key

(2) is damaged or

missing.

c. Check setscrews (4 and 5) for tightness. Set-

screw (4) is staked.

Staked set-

screw(s), ball, or

spring is missing.

d. Inspect cannon tube (6) for damage.

Any cracks in

cannon tube (6).

1

2

3

4

5

6