TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 336 of 1275

TM 9-2350-311-20-1

3-3 TROUBLESHOOTING CHART — CONTINUED

s.

FUEL LEVEL INDICATOR CIRCUIT —

(3) FUEL LEVEL INDICATOR (GAGE) SHOWS LEVEL

CONTINUED

FOR LOWER FUEL TANK, BUT NOT FOR UPPER

FUEL TANK

T00ls

General mechanic’s tool kit (item 64, Appx H)

Engine access door open (TM 9-2350-311-10)

Multimeter (item 36, Appx H)

Transmission access doors open (TM 9-2350-311-10)

TA-1 probe kit (item 43, Appx H)

Portable instrument panel cover removed (para 8-17)

(Long test leads may be needed for some tests;

Drivers instrument panel cover removed (para 8-17)

16 AWG wire maybe used as an extension.)

Fuel tanks full (TM 9-2350-311-10)

1. Place FUEL GAGE switch in LOWER position.

A

2.

3.

4.

5.

6.

Disconnect lead 31 from lower fuel tank

transmitter.

Turn MASTER switch ON and check FUEL

LEVEL gage for a reading.

If FUEL LEVEL gage shows a maximum

reading, place a jumper wire from lead 31 to

ground.

Check gage for reading.

Turn MASTER switch OFF.

Does FUEL LEVEL gage show minimum when

grounded and maximum when not grounded?

Replace lower fuel tank transmitter

(para 6-3).

I

B

1. Reconnect lead 31 to lower fuel tank

.

2.

3.

4.

5.

6.

transmitter.

Place FUEL GAGE switch in LOWER position.

Disconnect lead 31 from FUEL GAGE switch.

Place red lead of multimeter in FUEL GAGE

switch and black lead to ground.

Turn MASTER switch ON and check for

voltage.

Turn MASTER switch OFF.

Is voltage present?

I

CONTINUED ON NEXT PAGE

3-236

M109A4/M109A5 (ENGINE MODEL 7083-7396) SHOWN