TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM 9-2815-202-34 2-5. MALFUNCTION, PROCEDURES TEST OR INSPECTION, AND CORRECTIVE ACTION (Cont) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 3. ENGINE ROTATES BUT FAILS TO START Step 1. Check main fuel supply line valves are open and fuel supply level inadequate. Step 2. Check fuel pump for damaged drive shaft or drive coupling. insert end of 1/8 inch diameter wire through one of the pump flange drain holes. Crank engine momentarily ;note if slight vibration is felt in wire. If wire vibrates, drive shaft is all right. If no vibration is felt, replace fuel pump. WARNING Fuel spraying on hot components is an extreme fire hazard. Control leakage immediately to prevent injury. Step 3. Check for air in fuel system. a. Disconnect fuel return line and drain into a bucket. WARNING Protective fan screens must be installed prior to doing maintenance in the engine compartment when engine is running or when engine is in ground hop mode. Contact with rotating fan can cause injury (reference FM 21-11). b. Crank engine momentarily. Observe fuel return flow. Uneven flow or bubbles in fuel indicate air in fuel system. Step 4. Check for contaminated fuel (water in fuel). a. Drain and clean fuel strainer and filter. b. Replace with new element as required manual). (Refer to vehicle type-20 maintenance 2-4 Change 1