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TM 5-2815-241-34&P
TROUBLESHOOTING ON ENGINE TEST STAND - CONTINUED
Page
Engine misses at high idle ....................................................................................................................
Engine misses at idle.. ...........................................................................................................................
Engine misses under load .....................................................................................................................
Engine surges at governed rpm ............................................................................................................
Excessive black smoke at idle ..............................................................................................................
Excessive black smoke under load.. .....................................................................................................
Excessive crankcase pressure.. ............................................................................................................
Excessive noise.. ....................................................................................................................................
Excessive smoke under acceleration ...................................................................................................
Excessive vibration ................................................................................................................................
Excessive white smoke at idle.. ............................................................................................................
Fuel knocks (combustion noise)...........................................................................................................
Low oil pressure.. ...................................................................................................................................
Mechanical knocks.. ..............................................................................................................................
Oil temperature too high.. ......................................................................................................................
Sluggish engine acceleration.. ..............................................................................................................
2-427
2-428
2-428
2-429
2-429
2-429
2-430
2-430
2-431
2-431
2-431
2-432
2-432
2-433
2-433
2-433
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. COOLANT TEMPERATURE HIGH.
Step 1.
Check coolant level.
Refill to proper level.
Step 2.
Check engine oil level.
Refill crankcase to proper level.
Step 3.
Remove and test thermostat.
Replace defective thermostat.
Step 4.
Remove water pump (page 2-37). Inspect for incorrect or damaged impeller
(page 2-408).
Replace damaged or incorrect impeller.
2-425
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