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 TM 55-1905-223-24-3
Table 2-2. Troubleshooting-Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
STEP 6.
Check if valves or injectors are adjusted wrong.
Check valve and injector settings.
STEP 7.
Check if injection timing set wrong.
Check injection timing.
34. Main bearing noise.
STEP 1.
Check for insufficient oil or low oil pressure.
Correct oil level.
STEP 2.
Check for thin or diluted lube oil.
Change oil (PMCS Item 15).
35. Connecting rod bearing noise.
STEP 1.
Check for insufficient oil supply or low oil pressure.
Correct oil level.
36. Piston noise.
STEP 1.
Check for contaminated or poor quality fuel.
Check, clean, drain and replace.
37. Excessive fuel consumption.
STEP 1.
Check for restricted air intake.
Check intake air restriction (para. 2-29). Replace air cleaner element as required.
STEP 2
Check for exhaust restriction. If necessary, refer to Malfunction 14, Step 4.
a.
Remove exhaust restriction.
b.
Repair faulty or damaged piping as necessary.
STEP 3. Check for fuel line restriction.
Check the fuel supply line with a vacuum gauge. Refer to Malfunction 25, Step 6.
STEP 4.
Check for external or internal leaks.
a.
Check all lines and fittings for external leaks. Repair as necessary.
b.
Check cooling system and lubricating oil system for signs of fuel dilution. (Refer to Items No. 5 and No.
13, respectively, in this table.)
STEP 5.
Check for faulty or damaged injectors.
Clean or replace injectors as required (para. 2-40)
.
2-47
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