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 321 of 1275

TM 9-2350-311-20-1

CONTINUED FROM STEP A

B

1. Reconnect lead 36 to engine oil pressure

transmitter.

2. Disconnect lead 36 from ENGINE OIL

PRESSURE gage.

3. Turn MASTER switch ON and check

ENGINE OIL PRESSURE gage for a

reading.

4. If ENGINE OIL PRESURE gage shows a

maximum reading, use a jumper wire to

ground gage.

5. Check gage for reading.

6. Turn MASTER switch OFF.

Does ENGINE OIL PRESSURE gage show minimum

when grounded and maximum when not grounded?

C.

1. Reconnect lead 36 to ENGINE OIL

PRESSURE gage.

2. Disconnect lead 27 from ENGINE OIL

PRESSURE gage.

3. Place red lead of multimeters in lead 27

and black lead to ground.

4. Turn MASTER switch ON and check for

voltage.

5. Turn MASTER switch OFF.

I

Is voltage present?

I

Replace engine oil pressure

gage (para 8-1 7)

CONTINUED ON NEXT PAGE

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