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 145 of 775

TM 9–2350–311–10

Change 3

2–54.3

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

34.2

During

Driver’s Fixed

And Portable

Instrument

Panels

(LHR Engine

Model 7083–7391)

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.

c. At temperatures above 50

°

F (10

°

C) the GLOW

PLUGS indicator light (4) flashes light for one

second when GLOW PLUGS switch (5) is

turned to ON position.

At temperatures below 50

°

F (10

°

C) the GLOW

PLUGS indicator light (4) is lit for 35 seconds

and flashes light for one minute when GLOW

PLUGS switch (5) is turned to ON position.

Operation is to

occur in tempera-

ture below 40

°

F

(5

°

C) and if

GLOW PLUGS

indicator light (4)

remains lit.

NOTE

Depending on climatic conditions, it may take

several minutes to obtain these readings.

d. ENGINE OIL PRESSURE gage (6) reads: mini-

mum of 5 psi (34 kPa) at idle (650 RPM) 30-50

psi (207-345 kPa) at 1800 RPM.

ENGINE WATER

TEMP gage (7)

or ENGINE OIL

PRESSURE

e. ENGINE WATER TEMP gage (7) reads 170

°

F

minimum, 230

°

F maximum.

gage (6) is inop-

erative or does

not read within

limits.

1

3

5

4

7

6

2

NOTE

M109A4/M109A5 configuration shown.