TM 5-4320-300-14
6-2. SYMPTOM INDEX
Refer to the Symptom Index below. Locate the malfunction which is the same, or most nearly the same, as the trouble
you are having with the pump assembly. The Symptom Index lists the first page of troubleshooting information for that
malfunction. Follow the steps one by one, and perform the corrective actions listed.
Malfunction
Number
Description
Page
1.
Engine is hard to start
6-2
2.
Engine consumes excessive lube oil (may produce blue smoke) 6-3
3.
Engine produces excessive crankcase pressure 6-4
4.
Engine has low oil pressure
6-4
Table 6-1. General Support Maintenance Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE IS HARD TO START
Step 1.
Check for sticking or burned exhaust valves. Inspect valves (para 6-7).
Repair or replace faulty valves (para 6-9).
Step 2.
Check for broken or worn compression rings. Inspect pistons and rings (para 6-10). Inspect
cylinder liners (para 6-8).
Repair or replace pistons (para 6-10) and cylinder liners (para 6-8). Replace compression
rings (para 6-10).
Step 3.
Check for improper exhaust valve clearance.
a. Wipe off valve cover. Remove mounting bolts, valve cover, and gasket.
Discard gasket.
6-2
