Drivetrain - Revised Wheel Hub Service Procedures
No: 60/01/01/NASRef:
Issue: 1
Date: 02/23/01
Wheel Hub Contamination
AFFECTED VEHICLE RANGE:
Discovery Series II ALL
SITUATION:
REPAIR PROCEDURES AND WHEEL HUB CONTAMINATION
Wheel hub components can be affected by contamination resulting from current Workshop Manual repair procedures.
RESOLUTION:
USE REVISED REPAIR PROCEDURE FOR HUB ASSEMBLY REPLACEMENT
CAUTION:
Always use the procedure and components outlined in this bulletin instead of those found in the Workshop Manual or on RAVE. To avoid contamination of the hub components, the ABS sensor must never be removed from the hub assembly even when conducting diagnostics. The sensor and hub must always be considered a complete unit.
Brake rotor dust and road dirt can best be excluded from internal surfaces of the hub by replacement of entire hub assemblies including the pre-fitted ABS sensor. Modified hub repair procedures for both front and rear axles have been developed and are provided in the Repair Procedures below. New complete assemblies are available as the only repair components to be used in these procedures.
PARTS INFORMATION:
CAUTION:
Component parts previously available for repair procedures should NOT BE USED. Refer to Parts Bulletin PGI01-01 for complete information relating to credit and disposal of the replaced parts.
TAY100050 Flange and Bearing Assembly- Rear Qty 2 per vehicle
TAY100060 Flange and Bearing Assembly- Front Qty 2 per vehicle
Locally Sourced:
^ Loctite 648
WARRANTY CLAIMS:
NOTE:
Labor operations related to ABS sensor replacement are impacted by the publication of this bulletin. Because the ABS sensor will always and only be replaced as part of the hub assembly, the time for the hub assembly replacement and sensor replacement will be the SAME. Use the sensor replacement operation when the FAULT relates to the sensor. Use the hub replacement operation when the bearing or other mechanical hub element requires replacement:
REPLACEMENT OF FRONT HUB ASSEMBLIES (SELECT APPROPRIATE CODE FOR CAUSE)
60.25.01 Time 1.00 hr. (cause hub)
70.65.30 Time 1.00 hr. (cause sensor)
Replace Bearing Hub Assembly one side front
60.25.03 Time 1.40 hrs. (cause hub)
70.65.31 Time 1.40 hrs. (cause sensor)
Replace Bearing Hub Assembly both sides front
REPLACEMENT OF REAR HUB ASSEMBLIES (SELECT APPROPRIATE CODE FOR CAUSE)
64.15.14 Time 0.90 hr (cause hub)
70.65.32 Time 0.90 hr. (cause sensor)
Replace Bearing Hub Assembly one side rear
64.15.17 Time 1.50 hrs. (cause hub)
70.65.33 Time 1.50 hrs. (cause sensor)
Replace Bearing Hub Assembly both sides rear
FAULT CODE: U (Use for ABS sensor faults)
J (Use for hub mechanical component faults)
Normal warranty policy and procedures apply
REPAIR PROCEDURE
FRONT HUB/ABS ASSEMBLY REMOVAL
NOTE:
This procedure is to be followed whenever hub bearing or ABS sensor replacement is required.
CAUTION:
The ABS sensor must never be removed from the hub assembly. The sensor and hub must always be considered a complete unit.
CAUTION:
Failure to follow these revised procedures could cause bearing hub contamination.
WARNING:
Always ensure that a vehicles is properly supported during repairs.
1. Raise vehicle and remove the road wheel.
2. Release the stake in the drive-shaft nut. (Figure 1)
3. Apply brakes and remove the drive-shaft nut.
4. Release ABS sensor harness grommet from inner fender valance and disconnect the multi-plug.
5. Pull the harness through the opening into the wheel arch.
6. Release the harness from all the retainers on inner fender and suspension components. (Figure 2)
7. Remove the front brake disc. (See Brake Repairs)
8. Loosen the four bolts securing the front hub to the swivel hub. (Figure 3)
9. Release the hub/ABS sensor assembly from the steering knuckle.
10. Remove the hub/ABS sensor assembly with drive axle from the axle housing.
11. Position the hub/ABS drive axle assembly in a press and press the shaft from the hub/ABS assembly.
12. Remove the hub/ABS sensor assembly.
13. Remove the drive axle oil seal from the axle housing.
FRONT HUB/ABS ASSEMBLY INSTALLATION
1. Clean the drive axle oil seal recess, axle splines and all hub/ABS surfaces thoroughly.
2. Lubricate the new drive axle oil seal and the axle inboard of the spline with clean differential oil.
3. Using tool LRT-51-006 install a new axle shaft oil seal. (Figure 4)
4. Install axle shaft into the axle housing.
CAUTION:
The axle shaft nut must be installed and properly tightened to the correct torque before the Loctite starts to cure immediately after the hub/ABS assembly is installed on the axle shaft.
5. Apply a 3 mm (0.125 in.) wide bead of Loctite 648 around the drive axle circumference as shown in Figure 5.
6. Install hub/ABS assembly to drive axle, align steering knuckle and start the four retaining bolts
7. Tighten retaining bolts to 100 Nm (74 lbf.ft.).
8. Install front brake disc. (See Brake Repairs)
9. Start new stake nut on axle shaft, apply the brakes and tighten to 490 Nm (360 lbf.ft.).
10. Secure ABS wiring harness to retainers on suspension and inner fender.
11. Pass harness through fender well grommet.
12. Connect ABS harness multiplug to vehicle harness.
13. Install road wheel, torque to 140 Nm (103 lbf.ft.) and lower vehicle.
REAR HUB/ABS ASSEMBLY REMOVAL
NOTE:
This procedure is to be followed whenever either hub bearing or ABS sensor replacement is required.
CAUTION:
The ABS sensor must never be removed from the hub assembly. The sensor and always be considered a complete unit.
CAUTION:
Failure to follow these revised procedures could result in bearing hub contamination.
WARNING:
On SLS model ensure that the air suspension system is made safe before starting repairs. Always ensure that a vehicle is properly supported during repairs.
1. Raise vehicle and remove the road wheel.
2. Release the stake in the drive-shaft nut.
3. Apply brakes and remove the drive-shaft nut.
4. Remove the rear brake disc. (See Brake Repairs)
5. Disconnect the ABS multi-plug. (Figure 6)
6. Release the harness from all the retainers on the brake hose and bracket. (Figure 6)
7. Loosen the four bolts securing the front hub to the swivel hub.
8. Remove the hub/ABS sensor assembly with drive axle. (Figure 7)
9. Position the hub/ABS drive axle assembly in a press and press the shaft from the hub/ABS assembly.
REAR HUB/ABS ASSEMBLY INSTALLATION
1. Clean drive axle splines and mating hub/ABS assembly surfaces.
2. Fit drive axle to axle casing.
3. Clean axle housing and 0-ring surface.
4. Lubricate new bearing hub 0-ring with clean differential oil and install 0-ring to wheel hub.
CAUTION:
The axle shaft nut must be installed and properly tightened to the correct torque before the Loctite starts to cure immediately after the hub/ABS assembly is installed on the axle shaft.
5. Apply a 3 mm (0.125 in.) wide bead of Loctite 648 around the drive axle circumference. (Figure 5)
6. Install hub/ABS assembly to drive axle and start the four retaining bolts
7. Tighten bolts to 100 Nm (74 lbf.ft.).
8. Install rear brake disc. (See Brake Repairs).
9. Start new stake nut on axle shaft, apply the brakes and tighten to 490 Nm (360 lbf.ft.).
10. Secure ABS wiring harness to retainers on brake hose and bracket.
11. Connect ABS harness multiplug to vehicle harness.
12. Install road wheels, torque wheel nuts to 140 Nm (103 lbf.ft.) and lower vehicle.