TM-9-2320-272-24-4
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 4 OF 4
JUNE 1998
TM-9-2320-272-24-4 - Page 462 of 836
TM
9-2320-272-24-4
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Coat top of new gasket (4) and gasket surface (11) with light coat of sealing compound and position
gasket (4) on differential carrier housing (5).
Install access cover (3) on gasket (4) and differential carrier housing (5) with ten washers (2) and
screws (1). Tighten screws (1) 27-40 lb-ft (37-54 N•m).
Coat gasket surface (6) with light coat of sealing compound.
Install new gasket (7) and side cover (8) on differential carrier housing (5) with eight washers (10)
and screws (9). Tighten screws (9) 27-40 lb-ft (37-54 N•m).
Lubricate sealing surface of new oil seal (13) with GM grease, coat metal contact outer diameter
with sealing compound, and install new gasket (14) and seal (13) in front bearing cover (15) with
seal installer tool and arbor press.
NOTE
Ensure oil slots on retainer are not blocked with sealing compound
or covered by new gasket.
Coat both sides of new gasket (12) with light coat of sealing compound and position on retainer (18).
Remove eight screws (16) and washers (17) from retainer (18).
Install front bearing cover (15), seal (13), gasket (12), and retainer (18) on carrier
housing (5) with eight washers (17) and screws (16). Tighten screws (16) 93-120 lb-ft (126-163 N•m).
Lubricate sealing surface of new seal (25) with GAA grease, coat outside metal contact outer
diameter with sealing compound, and install in bearing cover (26).
Coat new gasket (24) with light coat of sealing compound and position on differential carrier
housing (5).
Place thrust washer (23) over mainshaft (22) and install rear bearing cover (26) with six new lock-
washers (28) and screws (27). Tighten screws (27) 24-40 lb-ft (33-54 N•m).
Do not tap or hammer companion flanges on driveshaft assembly.
Damage to bearings will result.
Install two companion flanges (21) on mainshaft (22) with two nuts (20). Tighten nuts (20)
300-400 lb-ft (407-542 N•m) and install two new cotter pins (19).
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