TM 5-4310-452-14
Table 5-1. Direct Support and General Support Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE
1. PERFORMS POORLY.
Step 1. Check to see if fluid passage bolt on injection pump is working properly,
Replace fluid passage bolt (see paragraph 5-19).
Step 2. Check to see if valve spring is broken.
Replace valve spring (see paragraph 5-13).
Step 3. Check to see if fuel Injector nozzle needles are dirty or sticking.
Clean or replace fuel injectors (see paragraph 5-19).
Step 4. Perform compression check (see paragraph 5-3).
Repair as necessary (see paragraph 5-6).
2. EXHAUST SMOKES EXCESSIVELY.
Step 1. If blue smoke is present, check to see if intake and exhaust valves are seating properly.
Repair cylinder head (see paragraph 5-7).
Step 2. If black smoke is present, check to see if fuel injectors are dirty or sticking, or fuel injection
pump is defective.
Clean or replace fuel injectors (see paragraph 5-19).
Replace fuel injection pump (see paragraph 5-20).
Step 3. Perform compression check (see paragraph 5-3).
Repair as necessary (see paragraph 5-6).
3. OPERATES BACKWARD WHEN TURNED OFF.
Check to see if unloader valve is damaged.
Repair or replace unloader valve (see paragraph 5-39).
4. OVERHEATS.
Step 1. Check to see if fuel injectors are dirty, sticking, or defective.
Clean or replace fuel injectors (see paragraph 5-19).
Step 2. Check to see if fuel injection pump is working properly.
Replace fuel injection pump (see paragraph 5-20).
COMPRESSOR
1. EXCESSIVE OIL CARRYOVER.
Check to see if seal is damaged or leaking.
Replace seal (see paragraph 5-35).
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