TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
Page 48 of 670
TM 9-2815-202-34 2-5. MALFUNCTION, TEST OR INSPECTION, AND CORRECTIVE ACTION PROCEDURES (Cont) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 10. WHITE EXHAUST SMOKE Step 1. Check for malfunctioning injectors. a. Remove rocker arm covers. 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. NOTE if injector is malfunctioning ,there will be no noticeable difference in sound and operation of engine. c. Hold fuel injector follower down with a screwdriver with engine idling to prevent operation of injector. lf necessary, replace faulty injector (Refer to Para 4-38). d. Install rocker arm covers. Step 2. Check for low cylinder compression (Refer to Para 8-14). Step 3. Check for sticking exhaust valves. a. Remove rocker arm cover and check for damaged or sticking exhaust valves. b. Check for correct exhaust valve clearance (Refer to Para 8-4). END OF TEST 2-14