TM-9-2320-260-34-1

TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; VOLUME 1 OF 2

JULY 1994
TM-9-2320-260-34-1

  TM-9-2320-260-34-1 - Page 33 of 657

TM 9-2320-260-34-1
Table
2-1.
Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
43.
44.
45.
46.
47.
DIFFERENTIAL
DIFFERENTIAL NOISY
Step 1. Check transfer case for proper operation (malfunction 41). Proceed to step 2 if noise is not
from transfer case.
Step 2. Check differential for proper operation. Remove all differential propeller shafts
(TM 9-2320-260-20). Manually turn wheels and observe differential action.
a. Remove differential from axle if wheels will not turn (para. 10-7).
b. Remove and inspect axles and bearings if wheels will not turn (TM 9-2320-260-20).
c. Disassemble and repair differential (para. 10-8).
END OF TESTING!
DIFFERENTIAL CLUNKS DURING TURNS OR INITIAL TAKEOFF
Step 1. Check front axle shafts and universal joints for defects (TM 9-2320-260-20). Remove and
repair components if defective (TM 9-2320-260-20).
Step 2. Check differential internal operation. Repair differential (para. 10-8).
END OF TESTING!
DIFFERENTIAL VIBRATES
Complete troubleshooting malfunctions 43 and 44.
END OF TESTING!
DIFFERENTIAL LEAKS OIL
Step 1. Check condition of axle seals and flange gaskets (if used). Inspect drum area for presence
of gear oil. Replace axle seals if gear oil is present in or on brakedrum (para. 10-3, front or
TM 9-2320-260-20, rear).
Step 2. Check differential shafts seals condition. Inspect for presence of gear oil at gaskets and
companion flange areas. Replace gaskets and seals if gear oil is present (para. 10-9).
Step 3. Check axle housing condition. Inspect axle housing for external evidence of gear oil.
a. Repair if axle housing(s) has pinhole leaks (TM 9-237) or replace axle housing
(para. 10-2 or 10-5).
b. Replace axle housing(s) if damaged (para. 102 or 10-5).
END OF TESTING!
ABNORMAL TIRE WEAR (FRONT AXLE)
Step 1. Check steering knuckle sleeve bushings condition and end play.
a. Replace steering knuckle bushings if defective (para. 10-3).
b. Install proper spacers if end play is excessive (para. 10-3).
c. Replace sleeves or axle housing if end play is still excessive (para. 10-2).
2-19


Back to Top