Chevrolet 1980 Light Duty Truck Service Manual page 322

4A -10 PROPELLER SHAFT
R E A R T R U N N I O N
R E A R Y O K E H A L F
Fig. 4A-20--Driving Out Bearing Cups
3. Place propeller shaft in vice as shown in figure 4A-
20. Drive one rear trunnion bearing cap from center yoke
as shown in figure 4A-20 until it protrudes approximately
9.52 mm (3/8").
Keep rear portion of propeller shaft up to avoid
interference of rear yoke half with center yoke.
4. Once the bearing cup protrudes 9.52 mm (3/8"),
release vice. Grasp protruding portion of cup in vice and
strike center yoke as shown in Figure 4A-21 until cup is
removed. Remove cup seal by prying off with a thin
screwdriver.
5. Repeat steps 3 and 4 for remaining bearing cup.
6. Once the center yoke cups have been removed,
remove rear yoke half bearing cups. Remove rear trunnion.
7. Gently pull rear yoke half from prop shaft. Remove
all loose needle bearings. Remove spring seal.
8. Remove front trunnion from center and front yoke
in same manner as described in Steps 2, 3 and 4. Before front
trunnion can be removed all four (4) bearing caps must be
removed.
Fig. 4 A -2 1 -B e a rin g Cup Removal
F R O N T Y O K E
Assembly
fittings, trunnions and yokes. Assemble all needle bearings
in caps (27 per cap); assemble needle bearings in front yoke
(28 total). Retain bearings with a heavy grease. Assemble
seals to bearing cups. If seals are damaged U-joint should
be replaced.
yoke on front trunnion. Install one bearing cup assembly
in front yoke. Drive in to a depth that the snap ring can be
installed. Install snap ring. Install remaining cup in front
yoke. Install snap ring.
in same manner.
seal on prop shaft (large face first). Gently slip rear yoke
half on prop shaft using care not to upset rollers. Insert rear
trunnion in center yoke.
Install one rear trunnion bearing cap in center yoke and
press into yoke until snap ring can be installed. Install
remaining cap and snap ring.
location is shown in Figure 4A-22. A needle nose grease gun
adapter J-25512 should be used. The access hole in the
crossmember should be used to help locate the lube fitting.
next to transfer case. Torque to specifications.
DOUBLE CARDAN TYPE-CV JO IN T
Inspection
snap rings is available to allow the removal of the two
trunnion caps shown at location
figure 4A -24.
this Section.
Fig. 4A-22--Lubrication Fitting
1. Clean and inspect all needle bearings, cups, seals,
2. Place front trunnion in drive shaft. Place center
3. Install front trunnion bearing cups in center yoke
4. With front trunnion completely installed, install
Install rear yoke half bearing caps on rear trunnion.
5. Grease centering ball. The lubrication fitting
6. Install propeller shaft with constant velocity joint
An inspection kit including two bearing caps and two
M ark the flange yoke and coupling yoke for
reassembly in the same position, as shown in
To service the trunnion
appropriate procedures given in the beginning of
1, in figure 4A -23.
caps, use the
LIG H T T R U C K S ER V IC E M ANUAL