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TM 5-4320-306-24
Table 3-1. Direct Support Troubleshooting-Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. ENGINE STOPS RUNNING OR PRODUCES BLACK, WHITE, OR GREY SMOKE
Step 1. Check adjustment of injection pump.
Adjust injection pump (para 3-13).
Step 2. Check for faulty injectors. Remove and test injectors.
Repair or replace faulty injectors (para 3-15).
Step 3 Check for malfunctioning fuel injection pump.
Replace fuel injection pump (para 3-13).
Step 4. Check for air in the fuel system.
Service fuel feed pump (para 2-32).
Step 5. Check for faulty fuel feed pump.
Repair or replace fuel feed pump (para 3-14).
5. ENGINE CONSUMES EXCESSIVE LUBE OIL (MAY PRODUCE BLUE SMOKE)
Step 1. Check for leaking oil pan.
If oil pan is leaking, remove from crankcase, seal and install (para 3-10).
If oil pan continues to leak, replace it (para 3-10).
Step 2. Check for lube oil cooler core leaks. Clean lube oil cooler and check for core leaks (para 3-8).
If leakage is evident, replace lube oil cooler (para 3-8).
Step 3. Check turbocharger for leaking oil seals. Check for oil on the impellers and walls of the compression
and turbine chambers. The presence of oil indicates seal leaks Oil seal leaks are caused by blocked
air intake ducts or damaged oil seals.
If the air filter and intake ducts are not blocked, the turbocharger oil seals must be replaced (para 3-
16).
3-4
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