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 164 of 775

TM 9-2350-311-10

Item

No.

50

51

Interval

After

After

Table 2–1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES

FOR M109 SELF-PROPELLED HOWITZER — CONTINUED

Location

Item to Check/

Service

Fan (Radiator)

Torsion Bars

Crewmember

Procedure

DRIVER

To prevent injury or death to personnel, keep

hands and loose clothing away from fans

when engine is running.

a.

b.

c.

d.

Open air intake grille and transmission access

doors.

Check for coolant leaks and serviceability of

hoses.

Inspect fans (1) for missing or damaged impel-

lers. Damage includes cracked, chipped, or bro-

ken impellers. If impellers are damaged, notify

unit maintenance.

Start engine, Check for oil leaks at fan drive.

Check that both fans (1) are turning. If both fans

are not turning, shut down engine and notify unit

maintenance.

Not Fully Mission

Capable If:

Class Ill leak is

found.

Fan (1) impellers

are missing,

cracked, chipped,

or broken.

Either fan (1)

does not turn

when engine is

running.

DRIVER

Check for broken torsion bars by prying up road

wheel.

Any torsion bar is

broken or mis-

sing.

2-70