TM-5-2815-241-34-P
ENGINE, DIESEL NTC-290
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT, MAINTENANCE (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)
MARCH 1987
TM-5-2815-241-34-P - Page 29 of 738
TM 5-2815-241-34&P
STUDS
1.
Replace all bent or loose studs and studs showing signs of stretching.
2.
Repair minor thread damage using a thread chaser.
3.
Replace all studs having stripped or damaged threads. If a stud has to be replaced, note the
following:
Removal
a.
Using a stud extractor, unscrew studs slowly to prevent heating and possible seizure.
b.
When studs are broken too short to use stud extractor, drill the stud and remove It with an
easyout.
Replacement
Only standard studs are supplied for replacement. If threaded openings are damaged and retapping
will not clean up threads, drill and tap opening to larger size and install a threaded insert.
NOTE
Ail replacement studs have a special coating and must have a small amount of mica-
based antiseize compound (item 2, appendix B) applied on threads before stud is
installed.
GEARS
1. Replace cracked gears.
2.
Replace gears that do not meet specifications given in paragraph relating to the port in which
they are installed.
3.
Replace gears having worn, galled, or pitted teeth. Remove sharp fins and burrs from gear
teeth with crocus cloth (item 4, appendix B) dipped in drycleaning solvent (item 16,
appendix B).
BUSHINGS AND BUSHING-TYPE BEARINGS
When bushings or bushing-type bearings are damaged or worn beyond specified limits, the
associated parts with which they are used must also be replaced.
OIL SEALS
Oil seals must be replaced when the thin feather edge is found to be damaged or when the seal
material becomes hard or brittle.
Removal
Press or pry a damaged oil seal from the casting or adapter, being careful not to damage bore in
casting or adapter.
2-7
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