TM-9-2320-273-34
TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
DECEMBER 1980
TM-9-2320-273-34 - Page 29 of 801
TM 9-2320-273-34
Table 2-7. M916/M920 Rear Axle Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
EXCESSIVE PLAY (BACKLASH).
Step 1.
Check differential bearing adjustment.
a.
Remove differential carrier. (Refer to para 12-4 for forward rear axle or
para 12-13 for rear rear axle).
b.
Adjust bearing (para 11-9e).
Step 2.
Check for damaged or worn differential.
Replace differential (para 12-5 through 12-9, or 12-14 through 12-17, as applicable)
2.
EXCESSIVE NOISE.
Step 1.
Check for damaged or worn pinion bearings.
a.
Remove differential carrier. (Refer to para 12-4 for forward rear axle or
para 12-13 for rear rear axle.)
b.
Replace defective bearings (para 12-5 through 12-9, or para 12-14 through
12-17, as applicable.)
Step 2.
Check for damaged or worn side carrier bearings.
Replace defective bearings (para 12-5 through 12-9, or para 12-14 through 12-
17, as applicable).
Step 3.
Check for damaged or worn spider gears.
Replace defective gears (para 12-5 through 12-9, or para 12-14 through 12-17
as applicable).
Step 4.
Check for damaged or worn ring and pinion gears.
Replace defective gear set (para 12-5 through 12-9 or Para 12-14 through
12-17, as applicable).
3.
LUBRICANT LEAKING.
Step 1.
Check for defective seals or gaskets.
a.
Remove differential carrier, if necessary to replace defective seal or gasket.
(Refer to para 12-4 for forward rear axle or para 12-13 for rear rear axle).
b.
Replace defective seals or gaskets (para 12-5 through 12-9, or para 12-14
through 12-17, as applicable).
2-13
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