TM 9-2350-247-34
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDING
LUBRICATION INSTRUCTIONS — Continued
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2) Inspect electrical parts for pinched or loose wires, and for cracked or broken wires, circuit cards, relays, and
connectors.
3) Inspect insulation and heat shrink tubing for cracks, tears, burns, or missing material.
REPAIR
10. GENERAL REPAIR. General repair procedures are given in the following steps. Special repairs are covered in the
task. After repair, clean all parts well.
a.
CASTINGS.
1) Replace all cracked or broken castings.
2) Repair minor damage to machined surfaces of castings with crocus cloth (WP 0080 00, Item 1). Replace any
part with defects that cannot be corrected or which will impair function.
3) Repair minor surface bends by working bent surface of casting across sheet of crocus cloth (WP 0080 00, Item
1) on surface plate. Replace bent castings which would impair assembly or function.
4) Repair damaged pipe or screw threads with correct tap or die.
b.
BALL BEARINGS. See TM 9-214 for inspection and maintenance of ball bearings.
c.
NEEDLE ROLLER BEARINGS. See TM 9-214 for inspection and maintenance of needle roller bearings.
d.
STUDS.
1) Replace all bent or loose studs, or studs which show signs of stretching.
2) Repair minor thread damage with standard thread chaser.
3) To remove studs, back out studs slowly with stud extractor to avoid heating and possible seizure. If studs are
broken too short to use extractor, drill and extract studs with suitable remover. A short stud may be removed by
welding nut to stud and removing with wrench.
4) To replace studs, lightly apply antiseize compound to stud before you install it. Only standard studs are
supplied for repair parts. If threaded hole is damaged beyond repair, drill and tap damaged hole. Install
threaded insert in tapped hole.
e.
GEARS.
1) Replace gears that have worn, pitted or gouged teeth.
2) Remove sharp burrs from gear teeth with crocus cloth (WP 0080 00, Item 1) dipped in cleaning compound
(WP 0080 00, Item 49).
CAUTION
Damaged housing bore can cause equipment failure. Do not damage housing bore when cutting
bushings.
NOTE
Do not remove bushings and bushing-type bearings unless replacement is necessary and
authorized. Removal usually damages these parts.
f.
BUSHINGS AND BUSHING-TYPE BEARINGS.
1) Replace bushings and bushing-type bearings if they are loose, scored, or have color change due to heat. When
you replace bushings and bushing type bearings, check nearby parts for damage or wear.
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