Needle-Type Roller Bearings.

f. Gears.

whicoh defects which cannot be corrected will impair

(1) Inspect gears for burs, wear. broken teeth,

the operation of the transmission.

and pitting at tooth contact areas.

(4) Inspect threaded openings for damaged

(2) Inspect bores of planetary pinions for wear

threads. Chase damaged threads with correct size

and pitting of bearing contact areas.

tap.

(3) Remove burs, using a soft honing stone.

(5) Replace housings or other cast parts that

Replace gears that are excessively worn or pitted.

are cracked or broken.

g. Splined Parts.

b. Roller or Ball Bearings. Refer to TM 9-214

(1) Inspect splined parts for twisted or broken

for proper cleaning and inspection procedures.

splines, burs, and excessive wear.

c. Needle-Type Roller Bearings.inspect bearings

(2) Remove burs. using a soft honing stone.

for free and smooth rotation, broken or missing

Replace parts which have twisted or broken splines

rollers. and tightness of fit in bore. If defects are

or excessive wear.

found, replace bearing, using proper replacer.

NOTE

h. Clutch Plates.

Do not remove needle bearings unless

(1) Inspect nonmetallic plates for excessive

replacement is necessary, since removal

wear, cracks, breaks, and deep scoring. Replace

usually results i n destruction of the

plates if such defects are found.

bearings.

(2) Inspect bronze-faced steel plates for burs,

d. Bushings. Bushing-Type Bearings, and Thrust

imbedded metal particles, severely pitted faces.

excessive wear. cracks, distortion, and damaged

Washers.

( 1 ) Inspect bushings and bushing-type

spline teeth. Remove burs, using a soft honing

bearings for size, scoring and out-of-roundness,

stone. Replace plates which have other defects.

burs, sharp edges, and evidence of seizing. Minor

(3) Inspect steel plates for burs, scoring,

scores, scratches, and sharp edges may be removed

excessive wear, distortion, imbedded metal, galling,

with crocus cloth. Out-of-round, deeply scored, or

cracks, breaks, and damaged spline teeth. Remove

worn parts should be discarded.

burs and minor surface irregularities, using a soft

NOTE

honing stone. Replace plates which have other

Do not remove bushings and bushing-type

defects.

bearings unless replacement is necessary,

i. Threaded Parts.

as removal usually damages these parts.

(1) Inspect all threaded parts for burs and

( 2 ) Remove bushings and bushing-type

stripped or damaged threads.

(2) Replace all parts which have stripped

bearings by using a puller or press when possible.

Bushings in blind holes may require removal by

threads or damage which cannot be repaired by

sawing or the use of a narrow cape chisel.

chasing the threads with a tap or die of the proper

CAUTION

size.

If necessary to cut out a bushing, do not

j. Snap Rings. Inspect snap rings for nicks. burs.

damage the bore into Which it fits.

distortion, and wear. Discard snap rings which are

(3) Inspect thrust washers for wear, distortion,

defective.

scores and burs. Correct minor defects. Replace

k. Springs. Inspect springs for wear, distortion,

parts that are worn, deformed, or scored.

breaks. evidence of overheating, and loss of tension

e. Oil Seals. Performed Packings. and Gaskets.

or compression. Discard defective springs. Refer to

(1) Inspect hook-type seal rings for wear,

table 6-2 for spring specifications.

distortion, and broken hooks. Replace defective

1. Shafts and Spindles.

seal rings.

(1) Inspect shafts and spindles for excessive

(2) Inspect composition-type seal rings or

wear. bending. scores. cracks, burs, and obstructed

packings for wear. brittleness. cracks, cuts,

oil passages.

(2)

minor surface

deformation, and deterioration. Replace defective

R e m o v e burs and

seals.

irregularities with crocus cloth or a soft honing

(3) Inspect lip-type seals for cracks, wear,

stone. Remove obstructions by probing with soft

cuts, and brittleness. Inspect springs and seal

wire or with compressed air. Discard parts with

shells. Replace any seal found defective. Use a non-

other Defects.

hardening sealing compound on the outside

m. Ball-Type Valves.

diameter of the seal to prevent leakage.

(1) Inspect steel balls for rust. pitting. and

NOTE

grooving. Inspect nylon balls for nicks, scratches,

grooving, and chipping, Discard balls which will

Removal of a seal will usually damage

it; inspect rigidly before reusing.

not seat properly.

(4) Replace all flat-type gaskets.

5-2