Wheel Bearing: Service and Repair

HUB BEARING
- Slacken off the front road wheel nuts 1/4 turn each.
- Jack up the front of the vehicle and support with axle stands.
- Remove one wheel nut, mark the wheel relative to the stud, and remove the remaining wheel nuts.
- Remove the road wheel/tire assembly.



- Disconnect the brake pad wear sensor block connector.

- Remove the lower guide pin bolt (1) from the caliper.



- Pivot the caliper (1) upwards to gain access to the brake pads (2).

NOTE: Use an open-ended spanner to hold the guide pin during removal. This will prevent damage to the rubber dust cover.

- Remove the brake pads and remove the upper guide pin bolt.



- Re-position the caliper for access to the carrier securing bolts (3), cut and remove the lock wire (4).
- Remove the carrier securing bolts and remove the carrier.
- Remove the disc securing screw and remove the disc.
- Pry off the hub grease cap.
- Remove the hub nut split pin and cover.
- Remove the hub nut and washer.
- Remove the hub assembly.
- Remove the outer bearing from the hub.



- Using a suitable punch, remove the inner (5), and outer bearing tracks (2).



- Remove the inner bearing (1) and seal from the stub axle (2).
- Clean all components and examine for wear and damage.
- Replace all damaged components.
- Refit the inner bearing track to the new hub using Service Tool 1 8G 134 and adaptor JD 550-5/1.
- Refit the outer bearing track to the new hub using Service Tool 1 8G 134 and adaptor JD 550-5/2.
- Fit the outer bearing and seal to the hub.
- Fit the inner bearing and a new seal to the stub axle.
- Pack the hub and coat the stub axle with Shell Retinax A grease.
- Lubricate the hub seal track.
- Fit the hub assembly to the stub axle.
- Fit the hub nut and washer.
- Tighten the nut to obtain an end float of 0.0762-0.0254mm (0.003-0.001 in).
- Align the hub nut cover and secure with a new split pin.
- Refit the grease cap.
- Refit the front disc assembly.
- Refit the road wheel.
- Lower the vehicle from the axle stands.
- Pump the brake pedal to centralize the pads.

DATA
- Front hub to stub axle end float 0.0762-0.0254mm (0.003-0.001 in)
- Front brake disc run out 0.004 in maximum
- Front brake disc run 0.005 in maximum
- out (parallelism)

SERVICE TOOLS
- 78G 134 Driver handle
- JD 550-5/1 Adaptor
- JD 550-5/2 Adaptor

TORQUE FIGURES
- Caliper carrier to vertical link 102-128 Nm
- Caliper to carrier 31-40 Nm
- Disc to hub 11-16 Nm
- Wheel nut to stud (steel wheel) 65-85 Nm
- Wheel nut to stud (alloy wheel) 88-102 Nm

SPANNER SIZES
- 13mm
- 17mm
- 22mm
- 15/16AF

OILS/GREASES
- Hub bearings/cap Shell Retinax A
- Seal lip cavities Shell Alvania 3