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 143 of 775

TM 9–2350–311–10

Change 3

2–54.1

Table 2–1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES

FOR M109 SELF-PROPELLED HOWITZER

Location

Item

No.

Interval

Item to Check/

Service

Crewmember

Procedure

Not Fully Mission

Capable If:

34.1

During

Driver’s Fixed

And Portable

Instrument

Panels

(Engine Model

7083–7396)

DRIVER

Check the following:

a. MASTER switch indicator light (1) is lit when

MASTER switch (2) is in ON position.

b. MASTER WARNING indicator light (3) is not lit

15 seconds after engine starts.

NOTE

Depending on climatic conditions, it may take

several minutes to obtain these readings.

c. ENGINE OIL PRESSURE gage (4) reads:

minimum of 5 psi (34 kPa) at idle (650 RPM)

30-50 psi (207-345 kPa) at 1800 RPM.

ENGINE WATER

TEMP gage (5)

or ENGINE OIL

PRESSURE

d. ENGINE WATER TEMP gage (5) reads 170

°

F

minimum, 230

°

F maximum.

gage (4) is inop-

erative or does

not read within

limits.

NOTE

M109A4/M109A5 configuration shown.

1

3

5

4

2