Chevrolet 70 1969 Series, Shop Manual

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REAR AXLE 4-7
H O U S IN G C H E C K
Refer to the Service portion of this M anual for “ Bent
H ousing C heck” which is accom plished before axle is
removed from vehicle.
AFTER REMOVAL
A fter axle assem bly has been completely disassembled,
housings m ay be checked for bent condition in following
m anner:
1. T em porarily install wheel hubs, and adjust wheel
bearings so that hubs will ju st turn. Do not lock ad ­
justm ent.
2. After axle shafts have been inspected as previously
described, install shafts and draw stud nuts up tight.
3. Indicators as shown in figure 12, can be m ade locally
from 3/16 inch drill rod to dimensions shown. R e­
move any burrs existing on shaft splines; then use
hose clam ps to hold indicators to shafts.
4. Each indicator m ust be positioned at right angle to its
shaft. Both indicators m ust be in alignm ent with one
another. There should be a slight gap between the
points. M easure and note dim ensions of this gap.
5. R otate shafts sim ultaneously and m easure gap at four
points, 90 degrees apart. If gap at any point exceeds
original gap by m ore than 1/16 inchs axle housing is
bent and should be replaced.
REPAIR
DIFFERENTIAL CASE
Excessive run-out on differential case m ay be corrected
by machining flange at gear side of case. Rem ove suffi­
cient metal from flange to correct run-out. Rem ove just
enough m etal to bring run-out within limits shown in
“ Specifications.”
OIL SEAL CONTACT SURFACES
Surface of parts, such as propeller shaft yoke, which is
contacted by oil seals m ust be free of corrosion, pits and
grooves. This condition can som etim es be cleaned up with
abrasives. W hen cleaning fails to clean up and restore
smooth finish, a new part m ust be installed.
OIL SEAL REPLACEMENT
Pinion oil seal is installed in a pressed m etal retainer
and is serviced as an assembly, therefore no replacem ent
inform ation is necessary.
Figure 12— Checking Alignm ent of Axle Housing
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L