4 - 2 0 . REPLACEMENT OF PARTS,
a. Break down unserviceable and unrepairable assemblies into issue, and return serviceable parts to stock.
Salvage parts or assemblies that cannot be repaired, selective-fitted, or reclaimed to the standards contained in this
manual. Use new parts to replace them.
b. If screws, washers, or nuts are loose or damaged, tighten or replace.
c. Replace gaskets, packings, preformed packings, seals, Iockwashers, locknuts, cotter pins, and spring
pins. Replace bushings only if removed.
d. If a required part is not available, recondition the old part. inspect such parts carefully after reconditioning
to determine their suitability and probable service life. Requisition replacement parts immediately.
a. Use a fine mill file, soft stone, or crocus cloth to remove burrs, scratches, or raised metal.
b. When filing aluminum, clean file often with steel file brush to avoid lodging file with aluminum particles that
will gouge work surface.