TM 9-2320-272-24-1
Table 2-2. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
24. LOSS OF COOLANT
Step 1. Check for leaks in cooling system.
a. Inspect radiator, hoses, hose connections, and drainvalves for leaks.
b. Tighten loose hose clamps and fittings.
c. Tighten or close drainvalves.
d. Replace defective cooling system components (chapter 3, section V).
Step 2. Check for coolant in transmission oil.
a. Check transmission oil for presence of coolant.
b. If coolant is present in transmission oil, check transmission oil cooler for damage and
leaks.
c. If damaged or leaking, replace transmission oil cooler (para. 3-140 or 3-141).
d. Drain and flush cooling system (para. 3-53).
END OF TESTING!
25. CONTAMINATED COOLANT
Step 1. If coolant appears rusty, drain and flush cooling system (para. 3-53).
Step 2. If transmission oil is present in coolant, perform malfunction 24, step 2.
Step 3. If engine oil is present in coolant, notify DS maintenance.
END OF TESTING!
TRANSMISSION
26. EXCESSIVE NOISE DURING SHIFTING
Step 1. Check transmission fluid level (TM 9-2320-272-10).
Drain or fill fluid as necessary (LO 9-2320-272-12).
Step 2. Check propeller shaft flanges for loose mounting bolts.
If loose, tighten mounting bolts 30-40 lb-ft (41-54 N-m).
Step 3. Inspect propeller shaft universal joints for looseness, wear, and damage.
a. If loose, tighten universal joint screws 90-110 lb-ft (122-149 Nm).
b. Replace worn or damaged universal joints (para. 3-154).
END OF TESTING!
27. LOW TRANSMISSION OIL PRESSURE
Step 1. Check transmission fluid level (TM 9-2320-272-10).
Drain or fill fluid as necessary (LO 9-2320-272-12).
Step 2. Replace transmission oil filter (para. 3-133).
END OF TESTING!
28. TRANSMISSION OIL LEAKING
Step 1. Inspect for leak at output shaft.
If output shaft oil seal is leaking, notify DS maintenance.
a. If loose, tighten drainplug.
b. If leak continues, notify DS maintenance.
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