Chevrolet 10 series 1973, Руководство по капитальному ремонту

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REAR AXLE DIF FER EN TIA L CARRIER 4 -5 3
Fig. 17E—Gear Tooth N om enclature
Contact Pattern Check is necessary to verify the correct
relationship between ring gear and drive pinion. Gear
sets which are not positioned properly may be noisy, or
have short life, or both. With a pattern check, the most
desireable contact between ring gear and drive pinion
for low noise level and long life can be assured.
Gear Tooth Nomenclature
The side of the ring gear tooth which curves outward, or
is convex, is referred to as the "drive" side. The concave
side is the "coast" side. The end of the tooth nearest
center of ring gear is referred to as the "toe" end. The
end of the tooth farthest away from center is the "heel"
end. Toe end of tooth is smaller than heel end. See
Figure 17E.
Pattern Check
1. Wipe oil out of carrier and carefully clean each
tooth of ring gear.
2. Use gear marking compound (yellow lead chromate
or equivalent) and apply this mixture to ring gear
teeth. When properly applied, the area of tooth
contact will be clearly visible after load is applied.
3. Tighten bearing cap bolts to specifications.
4. Apply load to gears by expanding brake shoes or by
wrapping a heavy rag around the companion flange
to resist rotation.
NOTE: A test made without loading the
gears will not give a satisfactory pattern.
Turn companion flange with wrench so that
ring gear rotates one full revolution then
reverse rotation so that ring gear rotates one
revolution in opposite direction. Excessive
turning of ring gear is not recommended.
5. Observe pattern on ring gear teeth and compare
with figure 18E. Make adjustments as outlined
below.
6. The important thing to achieve in the pattern check
and subsequent adjustments is to locate the contact
pattern centrally on the face of the ring gear teeth.
Pinion Depth Adjustment
1. The pinion depth shim may be replaced as
necessary to place the drive pinion at the correct
depth. See figure 18E.
2. Depth shims are available from .006 inch to .024
inch, in increments of .001 inch.
Backlash Adjustment
1. Remove locking retainers from side bearing
adjusting nuts.
2. Move adjusting nuts
an equal amount
in or out to
achieve proper backlash.
a. To increase backlash, loosen the left adjusting
nut and tighten the right adjusting nut
an equal
amount
b. To decrease backlash, loosen the right adjusting
nut and tighten the left adjusting nut
an equal
amount
OVERHAUL MANUAL