GMC 1982 Light Duty Truck Service Manual page 452

4 B 2 -8 R EAR A X LE
Fig. 4B2-18--Removing Straddle Bearing
4. Inspect the bearing retainer for cracks, imperfections,
corrosion, pits and grooves.
5. Replace parts as required.
Reassembly
1. Lubricate all parts with hypoid lubricant.
2. Press pinion rear bearing onto drive pinion as shown in
figure 4B 2 -19, using J-24433.
3. Install the front end rear pinion bearing cups into the
bearing retainer, using driver handle J-8092 on J-8608
for the front cup, and on J-24432 for the rear cup.
4. Install the pinion straddle bearing into the carrier
housing, using d riv er handle J-8092 and installer
J-23322, as shown in figure 4B2-20.
5. Place bearing retainer, with cups in position, onto the
drive pinion. Install a new collapsible spacer into
position.
6. Press front bearing onto drive pinion.
7. L u bricate the oil seal lips with a lithium -base
Fig. 4B2-19~lnstalling Pinion Rear Bearing
J -2 4 4 3 3
Fig. 4B2-20— Installing Straddle Bearing
extreme pressure lubricant, and install the seal in the
retainer bore. Use J-24434 with driver handle J-8092.
Press the seal into the bore until it seats against internal
shoulder.
8. Install pinion flange and oil deflector onto the splines,
then install lock washer and new pinion nut.
9. Clamp the pinion flange into a vise. Install J-8 61 4-1 1 as
in figure 4B2-14. Tighten the nut to achieve proper
bearing preload.
a. Proper preload is attained when rotational torque
required to rotate the pinion is 25-35 in. lbs. for new
bearings, or 5-15 in. lbs. for used bearings.
b. Tighten pinion nut to approxim ately 350 ft. lbs.,
then take a torque reading as sh ow n in figure
4B2-21 using J-5853.
c. Continue tightening pinion nut in small increments
until proper preload is attained.
Over-tightening of pinion nut may collapse
NOTICE:
spacer too much, requiring its replacement.
Fig. 4B2-21— Measuring Rotating Torque