Chevrolet 1980 Light Duty Truck Service Manual page 323

Fig. 4A-23--Bearing Cap Removal Sequence
W hen both bearing cups are free, disengage
the flange yoke and trunnion from the centering
ball. Note th a t the ball socket is part of the flange
yoke assembly, while the centering ball is pressed
onto a stud and is part of the ball stud yoke. See
figure 4A -25. Pry the seal from the ball socket and
remove washers, spring and the three ball seats
as illustrated in figure 4A -26.
1. Clean and inspect ball seat insert bushing for wear.
If bushing is worn, replace flange yoke and cross assembly.
2. Clean and inspect seal and ball seats along with
spring and washers. If any parts show indication of excessive
wear or are broken, replace the entire set with a service kit.
Whenever the seal is removed to inspect ball seat parts,
it should be discarded and replaced with a new seal.
3. Remove all plastic from groove of coupling yoke.
4. Inspect the centering ball surface. If it shows signs
of wear beyond smooth polish, replace it.
ALIGNMENT PUNCH MARKS
Fig. 4 A -2 4 -R e a s s e m b lin g Coupling Yoke
PROPELLER SHAFT
Fig. 4A-25~Cross Sectional View of CV Joint
Centering Ball Replacement
1. Place fingers of inner part of Tool J-23996 under
ball as shown in figure 4A-27.
2. Place outer cylinder of Tool J-23996 over outside
of ball as shown in figure 4A-28.
3. Thread nut on Tool J-23996 and draw ball off stud,
using wrench as shown in figure 4A-29.
4. Place the replacement ball on stud.
5. Using Tool J-23996, drive ball onto stud as in figure
4A-30, until the ball can be seen to seat firmly against the
shoulder at the base of the stud. This is important as the
center of the double Cardan joint is determined by the ball
seating tightly in the proper location.
6. Using grease provided in the ball seat kit, lubricate
all parts and insert them into the clean ball seat cavity in
the following order: spring, washer (smallest OD), three ball
seats (with largest opening outward to receive ball), washer
(largest OD) and seal.
Fig. 4 A -26~ E xp lod ed V ie w of Centering Ball M echanism
4 A -1 1
BALL
at
LIG H T T R U C K SER V IC E M ANUAL