TM-9-2520-270-34
HYDROMECHANICAL CROSSDRIVE, TRANSMISSION HMPT 500 AND TRANSMISSlON CONTAINER ASSEMBLY
TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE
NOVEMBER 1984
TM-9-2520-270-34 - Page 71 of 933
TM 9-2520-270-34
b.
CASTINGS.
(1) Replace all cracked castings or any part with defects that cannot be corrected or which will
impair transmission operation.
(2)
Repair minor damage to machined surfaces of castings with crocus cloth (Item 2, App B) or
soft honing stone. Pay particular attention to gasket surfaces.
(3) Repair minor surface bends by working bent surface of casting across sheet of crocus cloth
(Item 2, App B) on surface plate. Replace bent castings which may impair assembly or
operation.
(4) Repair damaged screw threads with correct tap or die.
c. BEARINGS
(1) See TM 9-214 for inspection and maintenance procedures for roller bearings, needle roller
bearings, and ball bearings.
(2) Replace any bearing if defects are found.
d.
BUSHINGS AND BUSHING- TYPE BEARINGS.
Replace bushings and bushing-type bearings if
they are loose, discolored due to overheating, or scored. When you replace bushings and
bushing-type bearings, check nearby parts for damage or unusual wear.
(1) Removal
Press out bushing or bushing-type bearing with suitable arbor press or with special
tools provided.
(2)
Installation.
Clean repaired parts before assembly or installation. Aline bushing or
bushing-type bearing in casting or retaining cage. Press bushing or bushing-type bearing
into place with suitable arbor press or with special tools provided.
e. THRUST WASHERS AND SHIMS.
(1) Remove minor defects with a crocus cloth (Item 2, App B) or soft honing stone.
(2)
Replace parts that are worn, scored, nicked, or deformed.
f.
OIL SEALS.
Oil seals must be replaced when thin feather edge is damaged or when seal
material is brittle.
(1) Removal
Press damaged oil seal from casting. Be careful not to damage bore.
2-9
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