REPLACEMENT OF PARTS

TM 9-2920-258-30&P

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GENERAL INSTRUCTIONS (cont.)

During disassembly, tag critical parts such as bearings and electrical leads to facilitate

reassembly.

CAUTION

Never mark bearing surfaces.

During assembly, sub-assemblies should be assembled first, combined into major components

where possible and then installed to form a complete component.

REPLACEMENT OF PARTS

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Unserviceable and irreparable assemblies will be broken down into issue and serviceable parts

will be returned to stock. Parts or assemblies which cannot be repaired, selective-fitted, or

reclaimed to the standards contained in this manual will be salvaged and new parts used to

replace them.

When assembling components and assemblies, replace damaged keys with new ones, if

possible. Screws, washers and nuts that are loose or damaged must be tightened or replaced.

Gaskets, packings, preformed packings, seals, Iockwashers, locknuts, cotter pins and spring

pins must be replaced. Bushings must be replaced only if removed.

Springs must be replaced if broken, kinked, cracked or do not conform to standards specified in

repair data.

Reconditioning of the old part is necessary if a required part is not available. Such parts should

be inspected carefully after reconditioning to determine their suitability and probable service

life. Replacement parts should be requisitioned immediately.

BALL AND ROLLER BEARINGS

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Refer to TM 9-214 for cleaning, inspection and lubrication of bearings, and instructions for

evaluation of bearing life.

REMOVING BURRS, SCRATCHES AND RAISED METAL

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Use fine mill file, soft stone or crocus cloth dipped in mineral spirits, paint thinner or dry cleaning

solvent to remove burrs, scratches or raised metal.

When filing aluminum, clean file often with steel file brush to avoid lodging file with aluminum

particles which will gouge work surface.

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