Chevrolet 1980 Light Duty Truck Service Manual page 318

4A-6 PROPELLER SHAFT
Fig. 4A-8--Bearing Cup Removal with Vise
Injected Plastic Type
Disassembly
Never clamp drive shaft tubing in a vise as
NOTICE:
the tube may be dented. Always clamp on one of the
yokes, and support the shaft horizontally. Avoid
damaging the slip yoke sealing surface. Nicks may
damage the bushing or cut the seal lip.
1. Support the drive shaft in a horizontal position in
ine with the base plate of a press. Place the universal joint
so that the lower ear of the shaft yoke is supported on a
28.57 mm (1-1/8") socket. Place the cross press, J-9522-3,
on the open horizontal bearing cups, and press the lower
bearing cup out of the yoke ear as shown in figure 4A-11.
This will shear the plastic retaining the lower bearing cup.
2. If the bearing cup is not completely removed, lift
the cross and insert Spacer J-9522-5 between the seal and
bearing cup being removed, as shown in figure 4A-12.
Complete the removal of the bearing cup, by pressing
it out of the yoke.
3. Rotate the drive shaft, shear the opposite plastic
retainer, and press the opposite bearing cup out of the yoke
as before, using Spacer J-9522.
Fig. 4A -9~B earin g Cup Removal w ith Press
1. Trunnion
2. Seal
3. Bearings
Fig. 4A-10~Universal Joint Repair Kit
4. Disengage cross from yoke and remove. Production
universal joints cannot be reassembled. There are no bearing
retainer grooves in production bearing cups. Discard all
universal joint parts removed.
5. Remove the remains of the sheared plastic bearing
retainer from the ears of the yoke. This will aid in
reassembly of the service joint bearing cups. It usually is
easier to remove plastic if a small pin or punch is first driven
through the injection holes.
6. If the front universal joint is being serviced, remove
the pair of bearing cups from the slip yoke in the same
manner.
Reassembly
A universal joint service kit is used when reassembling
this joint. See figure 4A-13. This kit includes one pregreased
cross assembly, four service bearing cup assemblies with
seals, needle rollers, washers, grease and four bearing
retainers.
Make sure that the seals are in place on the service
bearing cups to hold the needle rollers in place for handling.
1. Remove all of the remains of the sheared plastic
bearing retainers from the grooves in the yokes. The sheared
plastic may prevent the bearing cups from being pressed into
place, and this prevent the bearing retainers from being
CROSS PRESS
J-M22-3
Fig. 4A -11--Pressing O ut Bearing Cup
4. Washer
5. Cap
6. Snap Ring
LIG H T T R U C K S ER V IC E MANUAL