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 466 of 801
TM 9-2320-273-34
b. Drive Pinion and Ring Gears.
Inspect the ring gear for wear or damage. Gears which are worn,
ridged, pitted, or scored should be replaced. When necessary to replace either the pinion or ring gear of a
set, the entire gear set must be replaced.
c. Differential Nest Gears. Inspect
the differential assembly for the following.
(1) Check for pitted, scored or worn thrust surfaces of differential case halves, thrust washers,
spider trunnions, and differential gears. Thrust washers must be replaced in sets. The use of a combination
of old and new washers will result in premature failure.
(2) inspect for wear or damage to the differential pinion and side gear teeth. Always replace
differential pinions and side gears in sets.
d. Helical Gears.
Inspect helical gears for wear or damage. Gears which are worn, ridged, pitted or
scored, should be replaced. Helical gears of two-gear transfer trains or drop boxes with one-to-one ratios,
such as employed in the forward/rear carrier, must be replaced in sets.
Further, new helical gears used in
sets must be permanently marked with matching or timing symbols to aid in correctly positioning the teeth
of both gears at reassembly.
e. Ax/e Shafts.
Inspect axle shafts for signs of torsional fractures or other indication of impending
failure.
11-8. Repair or Replacement.
a. General.
(1) Replace all worn or damaged parts. Hexnuts with rounded corners, all Iockwashers, oil seals
and gaskets or silicone gasket material should be replaced at the time of overhaul.
(12) Remove nicks, mars, and burrs from machined or ground surfaces. Threads must be clean
and free to obtain accurate adjustment and correct torque. Studs must be tight prior to reassembling the
parts.
(3) When assembling component parts, use a press where possible.
b. Silastic Application
(item 29, App B).
(1) Removal of all gaskets including silicone is accomp
gasket off the carrier-to-housing surfaces.
(2) Application of silastic is as follows:
shed by peel ng or scraping the used
(a) Remove dirt, grease or moisture from the surface of the carrier and housing.
(b)
Dry the surface.
(c) Apply thin bead, approximately 1/8-inch diameter completely around one mating
surface and all fastener holes to assure complete sealing and prevent leakage.
11-20
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