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 437 of 1275

TM 9-2350-311 -20-1

CONTINUED FROM STEP M

P

1. Reconnect bulkhead-to-driver’s instrument

panel wiring harness to driver’s bulkhead.

2. Disconnect lead 76B from engine oil pressure

switch.

3. Place red lead of multimeter in relay oil

pressure switch and black lead to ground.

4. Turn MASTER switch ON, start engine, and

run at 1000 rpm.

5. Check for continuity.

6. Turn MASTER switch and engine OFF.

Is continuity present?

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Replace relay oil pressure switch

(para 8-9).

WARNING

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Fuel is hazardous waste and must be disposed of in

accordance with local procedures or direction of local

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Hazardous Waste Management office.

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NOTE

Step Q must be performed before proceeding. Fuel line

arrangement will remain the same for steps R and S.

Q

1. Disconnect quick disconnect at primary fuel

2.

Remove male portion of quick disconnect

and elbow from fuel filter.

3. Install male portion of quick disconnect and

elbow on hose.

4. Connect assembled hose to fuel line and

place other end in five gallon container to

catch flowing fuel.

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CONTINUED ON NEXT PAGE

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