TM 9-2320-272-24-1
Table 2-2. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Check that engine fuel grade is correct for vehicle use and climatic conditions
Step 2.
(TM 9-2320-272-10).
If fuel grade is incorrect, drain complete fuel system and replace with correct grade of fuel
(TM 9-2320-272-10).
END OF TESTING!
18. EXHAUST COLOR WHITE DURING NORMAL OPERATION AND IDLE
CAUTION
Thick white smoke indicates coolant is present in engine combus-
tion chambers during operation. When this condition is evident,
shut engine down immediately and determine cause. Continued
engine operations may result in permanent damage to engine.
Step 1. Check engine temperature. Ensure engine temperature is within normal operating range
175-200F (79-93C).
If temperature is above normal operating range, perform malfunction 23.
Step 2. Check for presence of water in fuel.
If water is present, drain fuel system, replace fuel filter (para. 3-30), and refill fuel tanks
(TM 9-2320-272-10).
Step 3. If problem still exists, notify DS maintenance.
END OF TESTING!
19. EXHAUST COLOR BLACK DURING NORMAL OPERATION AND IDLE
Step 1. Check air cleaner indicator for indication of air restriction,
a. If red appears at indicator window, inspect air intake stack for restrictions and, if
necessary, replace air cleaner element (TM 9-2320-272-10).
b. Reset air cleaner indicator by pressing button down.
Step 2. Check for fuel contamination.
a. Open drainvalve on fuel filter/water separator and drain approximately 1 pt (0.473 L) of
fuel into a glass container.
b. If contamination is present, continue to drain fuel up to 1 qt (0.946 L).
c. If contamination is still present, drain fuel tank(s) (para. 3-26).
d. Clean and flush fuel system. Dry with compressed air.
e. Replace fuel filter (para. 3-30).
f. Refill tank(s) with fuel (TM 9-2320-272-10).
g. Prime fuel system (para. 3-22).
END OF TESTING!
20. EXCESSIVE EXHAUST NOISE
WARNING
Do not touch hot exhaust system components with bare hands.
Severe injury to personnel may result.
2-72
