TM-9-2320-272-24-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4
JUNE 1998
TM-9-2320-272-24-1 - Page 166 of 1015
TM 9-2320-272-24-1
Table 2-2. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
36. TRANSFER CASE LEAKING OIL
Step 1.
Inspect drainplugs for leaks and looseness.
If loose and leaking, tighten drainplugs 35 lb-ft (48 N•m).
Step 2.
Inspect transfer case housing for leaks.
If leaking, notify DS maintenance.
END OF TESTING!
37. EXCESSIVE NOISE
Check transfer case fluid level (LO 9-2320-272-12).
a.
Fill to proper fluid level as necessary (LO 9-2320-272-12).
b.
Tighten filler plug 35 lb-ft (48 N-m).
c.
If problem still exists, notify DS maintenance.
END OF TESTING!
38. EXCESSIVE VIBRATION
Step 1.
Check transfer case fluid level (LO 9-2320-272-12).
a.
Fill to proper fluid level as necessary (LO 9-2320-272-12).
b.
Tighten filler plug 35 lb-ft (48 N•m).
Step 2.
Check yoke companion flange screws for proper torque.
Tighten screws 32-40 lb-ft (43-54 N•m).
END OF TESTING!
PROPELLER AND DRIVESHAFTS
39. EXCESSIVE NOISE OR VlBRATlON
Step 1.
Check universal joints for proper lubrication.
Lubricate universal joints as necessary (LO 9-2320-272-12).
Step 2.
Check torque of all propeller shaft flange yoke screws.
Tighten screws 32-40 lb-ft (43-54 N•m).
Step 3.
Inspect propeller shafts for wear and damage.
Replace any worn or damaged propeller shafts (chapter 3, section VIII).
NOTE
Perform step 4 for M927 and M928 model vehicles.
Step 4.
Inspect center bearing for looseness and damage.
a.
Tighten center bearing-to-forward rear axle propeller shaft yoke to transfer-to-center
bearing rear flange screws 32-40 lb-ft (43-54 N•m).
b.
If damaged, replace center bearing assembly (para. 3-150).
END OF TESTING!
2-78
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