PRELIMINARY INSTRUCTIONS FOR
CHAP 5, SEC I
POWER TRAIN OVERHAUL
i. T h r e a d e d P a r ts
(1) Inspect all threaded parts for
stripped or damaged threads and burrs.
(2) Replace all parts which have
stripped threads or damage which cannot
be repaired by chasing the threads with a
tap or die of the proper size.
Note. Chase threads with a used
t a p o r d i e . A n e w t a p m a y c ut
oversize, while a new die may cut
j. Snap Rings. Inspect snap rings for
nicks, burrs, distortion and wear. Discard
defective snap rings.
k. Springs. Inspect springs for wear,
distortion, breaks, evidence of overheat-
ing, and loss of tension or compression.
Discard defective springs.
l . Shafts and Spindles
(1) Inspect shafts and spindles for
excessive wear, bending, scores, cracks,
burrs and obstructed oil passages.
(2) Remove burrs and minor sur-
face irregularities with crocus cloth or a
soft honing stone.
by probing with soft wire or with com-
pressed air. Discard defective parts.
m . Ball-type Valves
(1) Inspect balls for rust, pitting
or grooving. Discard balls which will not
( 2 ) I n s p e c t b a l l s e a t s f o r w e ar
and pitting. Reseat by lapping with the
proper size ball. Discard parts in which
the seat cannot be restored.
n . Spool-type Valves
(1) Inspect valves for wear, burrs,
s c o r i n g a n d e v i d e n c e o f s t i c k i n g . T ry
valves in their bores. All valves should
move in their bores by their weight alone.
Do not force valves.
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