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 TM 55-1905-223-24-5
Table 3-1. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Coolant temperature above normal.
STEP 1.
Check for obstructed or damaged oil cooler.
Clean oil cooler (para. 3-14).
2.
Low lubricating oil pressure.
STEP 1.
Check for malfunctioning main oil pressure regulator.
Inspect main oil pressure regulator assembly (para. 3-14).
STEP 2.
Check for restricted or plugged lubricating oil pump signal orifice.
Clean the signal line orifice (para. 3-23).
STEP 3.
Check lubricating oil pump for malfunction.
Replace lubricating oil pump (para. 3-23).
3. High lubricating oil pressure.
STEP 1.
Check for malfunctioning main oil pressure regulator.
Check mail oil pressure regulator assembly (para. 3-14). Replace as required.
4. Engine cranks, but will not start (no smoke from exhaust).
STEP 1.
Check for broken camshaft.
Replace the camshaft (para. 3-24).
STEP 2.
Check to see if fuel pump is turning while cranking engine with starter.
Repair accessory drive (para. 3-19).
5. Warm engine runs rough or misfires in operating range.
STEP 1.
Check for damaged camshaft.
Replace camshaft (para. 3-24).
STEP 2.
Check wrong adjustment on valves or injectors.
Adjust valves/injectors (para. 3-16).
6. Rough idle.
STEP 1.
Check for wrong adjustment on injectors.
Adjust injectors (para. 3-16).
3-4
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