TM 5-4320-302-146-2. SYMPTOM INDEXRefer to the Symptom Index below. Locate the malfunction which is the same, or most nearly the same, as the troubleyou are having with the centrifugal pump unit. The Symptom Index lists the first page of troubleshooting information forthat malfunction. Follow the steps one by one, and perform the corrective actions listed.MalfunctionNumberDescriptionPage1Engine is hard to start6-32Engine consumes excessive lube oil (may produce blue smoke)6-33Engine produces excessive crankcase pressure6-44Engine has low oil pressure6-4Table 6-1. General Support Maintenance TroubleshootingMALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION1.ENGINE IS HARD TO STARTStep 1.Check for sticking or burned exhaust valves. Inspect valves (para 6-9).Repair or replace faulty valves (para 6-9).Step 2.Check for broken or worn piston rings. Inspect pistons and rings (para 6-16).Inspect cylinder head assembly (para 6-8).Repair or replace pistons (para 6-16) and cylinder head assembly (para 6-8).Replace piston rings (para 6-16).Step 3.Check for improper exhaust valve clearance.a.Wipe off rocker chamber cover.Remove hex bolt, cover, andgasket. Discard gasket.b.Check and adjust exhaust valve clearance (para 6-9).2.ENGINE CONSUMES EXCESSIVE LUBE OIL (MAY PRODUCE BLUE SMOKE)Step 1.Check for worn or broken oil control rings. Inspect pistons and rings (para 6-16).Inspect cylinder head assembly (para 6-8).Repair or replace faulty pistons (para 6-16) and cylinder head assembly(para 6-8). Replace piston rings (para 6-16).6-2
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