3. ENGINE OVERHEATS OR KNOCKS

2. ENGINE MISSES, OPERATES ERRATICALLY, OR LOSES POWER

TM-10-4930-204-13 Tank and Pump Unit Liquid Dispensing for Truck Mounting (United Manufacturing and Engineering Corp. Model Style 1) Manual
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TM 10-4930-204-13 Table 4-2. Organizational Troubleshooting (Cont) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 2. ENGINE MISSES, OPERATES ERRATICALLY, OR LOSES POWER (Cont) Step 6. Check for excessive carbon accumulation at cylinder head and top of pistons. Clean cylinder head and tops of pistons (para. 4-24 1). — Step 7. Check for loose cylinder head or defective cylinder head gasket. Tighten cylinder header replace defective gasket (para. 4-24 1 ). 3. ENGINE OVERHEATS OR KNOCKS. Step 1. Check for excessive carbon deposits. Clean pistons and cylinder head (para. 4-24 1 ). Step 2. Check engine for excessive dirt. Drycleaning solvent normally has a flash point of either 100 or 138 degrees F, depending on the type being used, but may flash at much lower temperatures if contaminated with gasoline or jet fuel. Avoid repeated and prolonged skin con- tact. Do not use near open flame or excessive heat. Clean engine cylinder radiation fins with drycleaning solvent and dry thoroughly. 4-15

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