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 121 of 775

TM 9-2350-311-10

Item

No.

19

Interval

Before

Table 2–1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES

FOR M109 SELF-PROPELLED HOWITZER — CONTINUED

Location

Item to Check/

Service

Traversing

Mechanism

Crewmember

Procedure

GUNNER

a. Check to ensure mounting hardware (1) is not

missing or loose.

b. Manual Traverse Check:

1.

2.

Place turret lock assembly (2) in UN-

LOCKED position. Place TRAVERSE CON-

TROL switch (3) on gunner’s selector switch

box assembly (4) in the MANUAL position.

Crank handwheel assembly (5) clockwise

and counterclockwise to be sure cab tra-

verses freely and smoothly.

c. Power Traverse Check:

Ensure turret lock assembly (2) is in UN-

LOCKED position. Turn vehicle MASTER

switch (not shown) and CAB POWER switch

(6) to ON position. Place TRAVERSE CON-

TROL switch (3) on gunner’s selector box

assembly (4) in POWER position. Turn gun-

ner’s control assembly handle (7) to the left

to check counterclockwise traversing and to

the right to check clockwise traversing. If

M109A4/M109A5 cab does not power tra-

verse, pull up on override lever on clutch

valve (8) and power traverse.

NOTE

Cover plate removed for clarity.

Not Fully Mission

Capable If:

Mounting hard-

ware (1) is loose,

missing or bro-

ken.

Neither traverse

method works.

2-35