TM 3-1040-276-10
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. ENGINE OVERHEATS.
WARNING
The engine and engine head may become very hot during operation. Do not touch engine or engine
head with bare hand.
Step 1. Check for hot engine head assembly. A hot engine head will radiate heat. Hold hand over
engine head to check for heat.
a. Raise float bowl to increase fuel flow to engine head, wait about 5 minutes, and check
engine head again.
b. If engine head is still too hot, open fog oil metering globe valve 1/4 turn, wait about 5
minutes, and check engine head again.
Step 2. Check for blue smoke around engine head seat and engine head.
a. Tighten engine head assembly.
b. If leakage continues, report on DA Form 2404 to your supervisor.
Step 3. Check if fog oil inlet hose is submerged in fog oil, submerge hose in fog oil and/or replace fog
oil supply if low. If supply is not low, move fog oil inlet hose up and down to prime fog oil pump.
If fog oil pump fails to pump fog oil, shutdown generator and go to step 4.
Step 4. Check fog oil inlet hose for clogged fog oil strainer.
Clean (p 3-16).
for fog oil gushing from hose.
If fog oil is gushing from hose, report on DA Form 2404 to your supervisor.
CAUTION
Be careful not to damage rocker arms or pump rod assembly when freeing rocker arms.
Step 6. Check for stuck rocker arms or pump rod assembly in fog oil pump air motor.
Refer to malfunction 4, step 1.
Stop engine and report on DA Form 2404 to your supervisor.
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