Page 581
..
INNER DRIVER WITH DIFFERENTIAL BEARING
SEATS
Removal
Remove the differential bearing cap retaining screws and
remove the cap and inner driver using tool 8790776 and
tool 8390270. Save the shims.
PRESSING ON THE DIFFERENTIAL
JOURNAL BEARINGS
Tool8790487
5. Locate the differential assembly in the transmission
case. If any part affecting the overall width of the differential assembly - e.g. the bearings - has been exchanged, the crown wheel backlash must be adjusted.
This is done by alteration of the combination of shims.
See section "Adjusting crown wheel gear backlash".
6. For fitting of the outer bearing rings in the bearing
seats, see under "Inner driver with differential bearing
seats - assembly". Fit the differential bearing seats
and the inner driver. Coat the threads of the 12 bolts
with sealing compound.
REMOVING THE DIFFERENTIAL
BEARING CAP
Tool 8790776 and 8390270
Dismantling
1. Remove the circlip from the driver using circlip pliers.
Tightening torque, differential bearing cap
40-60 Nm
30-45 ft.lb. (4.0-6.0 kpm)
REMOVING THE CIRCLIP
7. Mount the rear cover of the diffferential housing.
SAAB
473-7
Page 582
7. Remove the O-ring from the groove in the bearing cap.
2. Press out the driver from the differential bearing cap.
4
T
3 2
1
INNER DRIVER AND BEARINGS
1. Inner driver
2. Spring with plunge
3. Sealing ring
4. Cap
PRESSING OUT THE DRIVER
3. Using a screwdriver, remove the seal ring taking care
not to damage the bearing cap.
4. Remove the speedometer drive from the left bearing
cap.
5. Press out the ball bearing using tool 7841067.
IJ. Remove the bearing tracks for the differential bearings
by means of a suitable drift. A washer is located inside
the bearing track for the right-hand differential bearing cap (cap without speedometer drive) and the purpose of this is.to improve the bearing lubrication.
6. Lock ring
7. Oil level washer
8. Bearing track
9. O-ring
5. Ball bearing
Assembly
1. Press the ball bearing into the bearing cap using tool
7841141.
PRESSING IN THE BALL BEARING
PRESSING OUT THE BALL BEARING
Tool 7841141
Tool 7841067
2. Piece the washer inside the bearing track in the righthand bearing cap and press in the bearing tracks using
tool 8390114.
473-8
SAA\11
-
Page 583
S4579
MOUNTING THE CAP IN A PRESS
PRESSING IN THE BEARING TRACKS
Tool 7841067
Tool8390114
3. Using drift 8790800, press in the seals in such a way
that they will project approximately 0.08 in. (2 mm)
above the plane of the bearing cap.
6. Fit the circlip using circlip pliers.
7. Mount the speedometer drive.
8. Mount the O-ring in the groove in the bearing cap.
Installation
See page 473-4 for adjustment of the differential bearing clearance and adjustment of backlash.
1. Check that the O-ring is mounted on the bearing cap
and place the spring and plunger in the hole in the end
of the driver shaft.
2. Fit a suitable combination of shims to the two bearing
caps and mount the caps, together with inner driver,
to the transmission.
3. When securing the bearing cap, check that there is
backlash. Tighten the retaining screws to the prescribed
torque. Use sealing compound on the threads of the 12
screws.
PRESSING IN THE SEALS
Tool8790BOO
4. Adjust the bearing clearance and the backlash (see
page 473-4).
5. Press the bearing cap onto the driver shaft using tool
7841067.
473-9
Page 584
Tightening torque, dif- 40-60 Nm
ferential bearing cap
30-45 ft.lb.(4.0-6.0
kpm)
4. Check the backlash by measuring in four places.
CAUTION
Before the left-hand bearing cap can be mounted
(cap with speedometer drive) on automatic transmissions, two of the retaining screws must be fitted in the mating surfaces betw.een the transmission
and the engine. (See illustration)
.,.
\
DIFFERENTIAL
473-10
BEARING CAP WITH INNER DRIVER
SAAB
Page 585
UNIVERSAL JOINTS
INNER UNIVERSAL JOINT
The inner universal joint consists of a driver journalled on
a ball bearing in the differential bearing seat and splined
onto the differential gear. The driver is locked axially by
means of a circlip inside the ball bearing and by a spring
and plunger at the end of the driver which bears against
the differential shaft.
The driver is removed from the transmission complete
with the differential bearing seat.
REMOVING THE STEERING ARM
Tool8995409
5. Pull out the drive shaft through the wheel housing and
remove the entire front axle assembly.
6. See page 473-7 for the removal and installation of the
inner driver from the transmission.
7. If the rubber bellows on the inner or outer universal
joint needs renewing, detach the shaft from the outer
joint (see "Outer universal joints"). The rubber bellows
can then be slipped off the shaft.
INNER UNIVERSAL JOINT
The external design of the driver is in the form of a
sleeve in which there is a recess for the three-bearing universal joint of the inner drive shaft. When the car is in motion, the joint which is journalled in needle bearings can
slide axially in the driver sleeve as well as being jointed.
The joint is packed with grease and is protected by a rubber bellows. Lubrication of the joint is only necessary
when the joint is to be reconditioned or removed for
some reason.
Removing
1. Jack up the front of the car and take off the wheel.
2. Remove the brake housing and hang it up by the wheel
housing to avoid strain and damage to the brake hose;
then remove the brake disc and parking brake assembly
with cable.
3. Undo the large clamp from the rubber bellows on the
inner universal joint.
To separate the inner universal joint, fit cover 7323736
in the rubber bellows to stop the needle bearings falling
out and to keep dirt out of the joint. Fit protective cap
7838469 on the inner driver.
4. Disconnect the tie rod from the steering arm using
tool 8995409 and undo the nut on the upper ball
joint. Remove the screws from the lower control arm
bracket.
SAAB
Mounting
1. Make sure tha_t the inner driver is washed clean, and
then pack the needle bearing seats with grease. The
right amount will be obtained if the driver is filled
with grease.
GREASE
Use soft EP grease with a lithium-lead base designed to withstand wide variations in temperature and loading. Consistency in accordance with
NGLI 1: ESSO Beacon EP 1; Alvania EP grease 1'
or equivalent.
2. Slip the rubber bellows over the drive shaft and mount
the shaft and rubber bellows to the outer universal
joint (see "Outer universal joints").
3. Pack the needle bearings with grease and fit the bearings over the ends of the drive shaft. Mount cover
73 23 736 in the rubber bellows to protect the bearings and prevent them from falling off. Then insert
the shaft complete with rubber bellows through the
wheel housing.
475-1
Page 586
1
OUTER UNIVERSAL JOINT
4. Take the cover out of the rubber bellows and slide the
drive shaft complete with needle bearings into the inner driver. Locate the rubber bellows and put on the
clamps.
5. Mount the steering knuckle housing and steering arm.
6. Mount the parking brake assembly with handbrake
wire, the brake disc and the brake housing.
7. Mount the wheel and lower the front of the car.
General
The outer universal joint transfers the power from the
intermediate to the outer drive shaft. The outer drive
shaft terminates in a bell with a spherical track in which
six balls transmit the driving power from a hub. The intermediate drive shaft is splined onto the hub and is
locked axially by means of a circlip accessible through a
recess in the hub. The hub, balls and outer shaft are individually matched and are not interchangeable. Lubrication of the joint is only necessary when the joint is to be
reconditioned or removed for some reason.
IMPORTANT
After the brake housing has been mounted the brake
pads must be advanced to their correct positions
close do the disc by repeated pumping of the footbrake pedal. Otherwise the footbrake will not work.
1 2
475-2
3
4
6
5
OUTER UNIVERSAL
JOINT
1. Lock nut
2. Washer
3. Wheel hub
4. Outer drive shaft
5. Bearing with seals
6. Outer drive shaft joint
SAAB
S4379
Page 587
Dismantling
1. Remove the hub cap and hub nut. Back off the wheel
nuts.
2. Block up the front of the car and remove the wheel.
3. Rotate the disc so that one of the recesses in the edge
of the disc will be in line with the brake pads. Disconnect the handbrake cable and remove the brake housing. Suspend the brake housing to avoid damage to
the brake hose or line.
4. Remove the hub and disc from the shaft by means of
extractor 8995185 and four extension sleeves 8996050.
REMOVING THE FRONT AXLE ASSEMBLY
8. Mount the steering knuckle housing in a press and
press out the outer drive shaft.
REMOVING THE BRAKE DISC
Tool 8995185 and 4 extensions 8996050
5. Remove the large clamp round the rubber bellows on
the inner universal joint.
6. Free the steering arm and the upper ball joint using
tool 8995409. Undo the screws on the lower control
arm bracket.
After separation of the inner universal joint, fit a cover
to the rubber bellows to prevent the needle bearings
from falling out and to keep dirt out of the joint. Fit
a protective cap over the inner drive.
7. Withdraw the drive shaft through the wheel housing
and remove the entire front axle assembly, which
should then be cleaned thoroughly.
THE OUTER DRIVE SHAFT IS PRESSED OUT
9. Remove the intermediate drive shaft from the ou1!er
universal joint hub as follows:
a. Loosen the rubber bellows on the outer universal
joint and slide it along the shaft.
b. Mount the shaft in a press and press together the
two conical washers so that the circlip inside the
hub can move in its groove.
&AMI
475-3
Page 588
Installation
1.
Assemble the intermediate drive shaft to the outer
universal joint as follows:
a. Pack the joint with grease.
b. Fit the shaft locking ring, the two dished spring
washers, (with concave sides facing inwards) and
the spherical washer. Insert the shaft in the universal joint hub.
N.B.
Pack the joint with grease before fitting the intermediate shaft.
COMPRESSING THE WASHERS
c. Open the circlip by means of circlip pliers and re:
lease t, ,e pressure.
SHAFT WITH LOCK RING AND WASHERS
c. Mount the unit in a press and press together the
dished washers so that the circlip inside the hub
snaps into the groove in the shaft. Pull the shaft
to check that it is held securely.
d. Pack the joint with grease and assemble the rubber bellows. Fit the clips with tool 7844699.
OPENING THE CIRCLIP
d. Withdraw the intermediate shaft from the hub together with the spherical shaped washer, the two
conical washers and the shaft locking ring. The circlip on the hub remains in the groove.
FITTING THE CLIPS
Tool 7844699
2.
475-4
SA.Ml
Mount the outer drive shaft in the press and press
on the knuckle housing and the bearing. Press on
the inner race of the bearing.
Page 589
4.
5.
6.
1.
8.
9.
54392
PRESSING ON THE INNER RACE OF THE BEARING
3.
Press the wheel hub and disc onto the drive shaft
splines and fit the conical washer and locking nut.
The nut should be locked later.
10.
If the inner universal joint needle bearings have
been removed, grease them and mount them on
the stubs of the shaft. Fit the cover to protect
the needle bearings and insert the drive shaft
through the wheel housing. Ensure that the inner
driver is clean and packed with grease.
Assemble the inner universal joints. Fit the upper
ball bolt to the steering knuckle housing and fit
the lower control arm bracket. Secure the inner universal joint bellow clips.
Mount the steering arm.
Mount the brake housing.
Fit the wheel and lower the car.
Tighten the hub locking nut to the prescribed
torque and secure the nut by peening the flange in
the locking groove.
Tighten the wheel nuts securely and fit the hub cap.
CAUTION
The brake pads must be advanced to their proper position close to the disc which is done by pumping
the brake pedal repeatedly. Otherwise the brake will
not work.
PRESSING THE WHEEL HUB ONTO THE SHAFT
475-5