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 120 of 775

TM 9-2350-311-10

Item

No.

17.1

18

2-34

Interval

Before

Before

Table 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES

FOR M109 SELF-PROPELLED HOWITZER - CONTINUED

Location

Item to Check/

Service

Variable Recoil

Assembly

Cannon

Equilibrator

Change 2

Crewmember

Procedure

CHIEF OF SECTION

Before firing, there shall be no more than 1 ml

(approximately 25 drops) of oil accumulation at

any seal interface location and no evidence of

seepage of hydraulic fluid from any of the hy-

draulic tubes, manifolds, hose connections,

and fill bleeder valves.

Check for oil accumulation at seal interface(s) and

for any hydraulic leaks.

GUNNER AND ASSISTANT GUNNER

NOTE

Ensure that equilibrated elevation cylinder has

been equilibrated.

a. Unlock travel lock assembly, check power eleva-

tion operation at gunner’s control assembly (1).

b. Check manual and power elevation operation at

assistant gunner’s control (2).

Not Fully Mission

Capable If:

Cannon assembly

will not elevate.

Neither elevation

method works.