PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDING
LUBRICATION INSTRUCTIONS Continued
NEEDLE ROLLER BEARINGS. See TM 9-214 for inspection and maintenance of needle roller bearings.
Replace all bent or loose studs, or studs which show signs of stretching.
Repair minor thread damage with standard thread chaser.
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.
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.
Replace gears that have worn, pitted or gouged teeth.
Remove sharp burrs from gear teeth with crocus cloth (WP 0122 00, Item 11) dipped in cleaning compound
(WP 0122 00, Item 8).
Damaged housing bore can cause equipment failure. Do not damage housing bore when cutting
Do not remove bushings and bushing type bearings unless replacement is necessary and
authorized. Removal usually damages these parts.
BUSHINGS AND BUSHING TYPE BEARINGS.
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.
Remove bushings and bushing type bearings by pressing them out. Use a suitable arbor press or special tools.
It may be necessary to remove bushings in blind holes with a saw, or by using a narrow cap chisel.
Install bushings or bushing type bearings by aligning them in casting or retaining cage. Press bushing or
bushing type bearings into place with suitable arbor press or with special tools.
OIL SEALS. Oil seals must be replace when thin feather edge is damaged, or when seal material is brittle.
Press damaged oil seal from casting. Be careful not to damage bore.
When oil seal bore is damaged so an oil tight seal is impossible, replace casting or adapter. Remove slight
nicks, burrs, and scratches with crocus cloth (WP 0122 00, Item 11) dipped in cleaning compound
(WP 0122 00, Item 8).
Install new oil seal in casting bore or adapter using suitable oil seal replacement tool.
INSERTS. Replace insert when threads are stripped or when insert is cracked or loose.
Drill and remove damaged insert from casting.
Install new insert in casting using suitable replacement tool.
Install plugs in armor mounting inserts, as required.