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, TEST OR INSPECTION, AND CORRECTIVE ACTION PROCEDURES (Cont) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION ABNORMAL ENGINE OPERATION 4. UNEVEN RUNNING OR STALLING Step 1. Check fuel supply level. Step 2. Check fuel strainer and fuel filter for Ieaking gaskets, clogged filters, or loose connections. Step 3. Check fuel lines for loose connections, damage, twists, and bends. Step 4. Check fuel spill back for air in fuel system. a. Disconnect fuel return line from fitting at fuel tank. Hold end of fuel line in a container. 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. Start engine and run at 1200 RPM. NOTE Air bubbles rising to surface indicate air being drawn into fuel system. c. Measure fuel; 0.8 GPM is required. Step 5. Check engine tune up adjustments (Refer to Para 8-5). 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). Step 6. Check for faulty injectors. a. Remove rocker arm cover. b. Start engine. 2-6