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 TM 55-1905-221-14-1
Table 4-1. Troubleshooting (Continued).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2. Check for cracked or loose connections between fuel pump and tank.
a. Tighten loose connection or replace line (para 4-54).
b. If there are no cracked lines or loose connections, go to Step 3.
Step 3. Check for insufficient fuel flow.
a. Test fuel flow as described in MALFUNCTION 1, Step 4 above. b. If fuel flow is sufficient, go to
Step 4.
Step 4. Check for insufficient air.
a. Remove air box covers and inspect the cylinder liner ports. If ports are over 50 percent clogged,
clean them. Check compression pressures (para 4-44).
b. If pressure is correct, notify your supervisor.
3. DETONATION.
Step 1. See if oil is picked up in air stream.
a. Clean the air box and drain tubes to prevent accumulations t at may be picked up by the air stream
h
and enter the engines cylinder.
b. Check blower oil seals by removing the air inlet housing (para 4-46) and watching through the
blower inlet for oil radiating away from the blower rotor shaft oil seals while the engine is running.
If oil is passing through the seals, notify your supervisor.
Step 2. Check for low coolant temperature. a. Check to see if thermostat is closing. Install a new thermostat
if required (para 4-60).
4-7
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