TM 9-2320-260-20
Table 2-2. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 3. Open valve and drain 0.5 pt (0.25 L) of fuel from fuel line. Check for contaminated fuel.
Remove fuel tank if water or contamination is present (para. 3-24). Clean and flush entire
fuel system. Dry system with compressed air.
Replace fuel filter if filter is dirty or clogged (para. 3-26).
Step 5. Inspect fuel lines and connections for leaks, obstructions, and damage.
a. Visually check for leaks. If a leak is at a connection, tighten. Replace tubing if leak
results from cracked, split, or damaged tubing.
b. Disconnect fuel lines at both ends. If fuel line is clogged, clear with compressed air.
c. Reconnect fuel line(s).
d. Prime fuel system (TM 9-2320-260-10).
a. If white smoke can still be seen, air may be in fuel system. Prime fuel system
(TM 9-2320-260-10).
b. If white smoke can still be seen, coolant maybe inside combustion chambers. If coolant
is present on dipstick, notify your supervisor.
END OF TESTING!
3. ENGINE CRANKS SLOWLY, HARD TO START
Step 1. Check starting system circuits (table 2-4, electrical troubleshooting, malfunction 3).
Step 2. In cold weather make sure proper engine oil is being used.
Add or replace oil (LO 9-2320-260-12).
END OF TESTING!
4. ENGINE MISFIRES OR STOPS DURING NORMAL OPERATION
Step 1. Check air cleaner for restrictions (malfunction 2, step 2).
Step 2. Check fuel system for contamination and restrictions (malfunction 2, steps 3,4, and 5).
Step 3. Check exhaust system for bends, restrictions, or damage.
Replace restricted or damaged parts (chapter 3, section VI).
END OF TESTING!
5. POOR ACCELERATION AND/OR LACK OF POWER
Step 1. Check air cleaner for restriction (malfunction 2, step 2).
Step 2. Check fuel system for contamination and restrictions (malfunction 2, steps 3,4, and 5).
Step 3. Check exhaust system for restrictions.
Replace restricted or damaged parts (chapter 3, section VI).
Step 4. Inspect accelerator pedal and accelerator control linkage for full travel.
Adjust throttle lever travel (para. 3-37).
Step 5. Check accelerator control linkage for binding and sticking.
Replace accelerator control linkage if binding or sticking (para. 3-37).
Step 6. Check vehicle for dragging brakes, low tire inflation, or cargo overload limit
(TM 9-2320-260-10).
a. If defects are evident during checks, adjust or replace components (para. 8-8, 8-9, or
TM 9-2320-260-10).
b. Correct overload condition (TM 9-2320-260-10).
END OF TESTING!
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