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REAR AXLE D IF FER EN TIA L CARRIER
4-61
Fig. 12F—Gear Tooth N om enclature
in setting the pinion depth and the ring gear-to-pinion
backlash.
GEAR TOOTH CO NTACT PATTERN CHECK
Prior to final assembly of the differential, a Gear Tooth
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 12F.
Test
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 sparingly to
all ring gear teeth using a medium stiff brush.
When properly used, the area of pinion tooth
contact will be visible when hand 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 13F. Make adjustments as necessary.
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.
Adjustments Affecting Tooth Contact
Two adjustments can be made which will affect tooth
contact pattern. These adjustments are backlash and
position of drive pinion in carrier. The effects of bearing
preloads are not readily apparent on hand loaded teeth
pattern tests; however, these adjustments should be
within specifications before proceeding with backlash
and drive pinion adjustments.
NOTE: It may be necessary to adjust both
pinion depth and backlash to obtain the
correct pattern.
The position of the drive pinion is adjusted by
increasing or decreasing the shim thickness of the inner
shim, located between the rear bearing cup and the
carrier housing. Increasing the shim thickness will move
the pinion closer to centerline of the ring gear.
Decreasing shim thickness will move pinion farther away
from centerline of the ring gear.
Backlash is adjusted by means of the side bearing
adjusting shims which moves the entire case and ring
gear assembly closer to, or farther from the drive pinion.
(The adjusting shims are also used to set side bearing
preload). To increase backlash, increase right shim and
decrease left shim an equal amount. To decrease
backlash, decrease right shim and increase left shim an
equal amount.
OVERHAUL MANUAL
Содержание 10 series 1973
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Страница 34: ...REAR AXLE DIFFERENTIAL CARRIER 4 3 OVERHAUL MANUAL...
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Страница 144: ...ENGINE 6 3 OIL PRESSURE SENDING UNIT Fig 1 In Line Engine Lubrication OVERHAUL MANUAL...
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Страница 185: ...6M 6 CARBURETORS Fig M6 Monojet See Fig M7 for legend...
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Страница 247: ...7 M 28 CLUTCHES AND MANUAL TRANSMISSIONS Fig 19X Loading Countergear Bearings Fig 20X Loading Mainshaft Pilot Bearings...
Страница 289: ...7M 70 CLUTCHES AND MANUAL TRANSMISSIONS Fig 13F Transfer Case Exploded View OVERHAUL MANUAL...
Страница 352: ...AUTOMATIC TRANSMISSION 7A 49 Fig 85M Planetary Gear Train Exploded View OVERHAUL MANUAL...
Страница 363: ...7A 60 AUTOMATIC TRANSMISSION Fig IT S ide Cross Section Typical OVERHAUL MANUAL...
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