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 109 of 775

TM 9-2350-311-10

Item

No.

10

Interval

Before

Table 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES

FOR M109 SELF-PROPELLED HOWITZER — CONTINUED

Location

Item to Check/

Service

Driver’s Fixed

And Portable

Instrument

Panels

(LHR Engine

Model 7083-7391)

Crewmember

Procedure

DRIVER

Check the following:

a.

b.

c.

MASTER switch indicator light (1) is lit when

MASTER switch (2) is in ON position.

MASTER WARNING indicator light (3) isn’t lit

15 seconds after engine starts.

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.

NOTE

Depending on climatic conditions, it may take

several minutes to obtain these readings.

d. ENGINE OIL PRESSURE gage (6) reads 30 to

70 psi (207 to 483 kPa) at fast idle.

e. ENGINE WATER TEMP gage (7) reads 170° F

minimum, 230° F maximum.

NOTE

Not Fully Mission

Capable If:

Operation is to

occur in tempera-

ture below 40° F

(5° C) and if

GLOW PLUGS

indicator light (4)

remains lit.

ENGINE WATER

TEMP gage (7)

or ENGINE OIL

PRESSURE

gage (6) is inop-

erative or does

not read within

limits.

2-23