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Guidelines for a Passenger Car Front Wheel-End Application

Timken continues to lead the hub unit bearing evolution by providing assemblies that are uncompromised in quality, reliability and consistency. Proper hub unit bearing removal and installation procedures can enhance the performance and life of hub unit bearings, axles, wheels, brakes and other components. Following are guidelines for removing and installing a hub unit bearing assembly on a passenger car front wheel-end application.

1. Inspect the surface of the axle shaft, spline teeth and tone wheel for wear. Use a fine file, wire brush, emery cloth or honing stone as appropriate to remove any debris, nicks or burrs.
2. Carefully check the positioning of the splines on the axle shaft while installing the steering knuckle. The proper positioning of components is critical so that the splines are not damaged. NOTE: Never force the hub unit bearing assembly onto the shaft or strike with a hammer.these two
3. Install the strut mounting bolts that attach the steering knuckle to the strut assembly and torque them to the vehicle manufacturer’s specifications using a torque wrench.
4. Install the bolts that attach the lower ball joint to the lower control arm and torque them to the vehicle manufacturer’s pecifications using a torque wrench.
5. Attach the lower ball joint to the lower control arm and install the nut. Torque the nut to the vehicle manufacturer’s specifications
using a torque wrench.
6. Secure the nut using a new cotter pin.
7. If applicable, be sure to properly attach the ABS sensor cable to the vehicle. Connect the sensor to its mating connection point.
8. Ensure that the brake rotor, caliper mounting bracket and caliper are free of debris and burrs. Install the brake rotor. Follow the vehicle manufacturer’s recommendations for rotor inspection and reuse.
9. Install the caliper mounting bracket. Torque the bolts to the vehicle manufacturer’s specifications.
10. Next, install the caliper on the caliper mounting bracket, being careful not to damage the rubber boots. Place the manufacturer’s
recommended lubricant on the caliper bolts. Install the bolts to the vehicle manufacturer’s torque specifications.
11. Prior to installing the axle nut, apply the brake to prevent axle rotation or damage to transmission and transaxle components. This
can be accomplished by using either a brake pedal depressor or having an assistant depress the brake pedal.
12. Install the axle nut. Follow the vehicle manufacturer’s instructions for proper tightening of the axle nut.
13. Secure the axle nut with the locking procedure specified by the vehicle manufacturer.
14. Replace the wheel and tire assembly. Install the lug nuts. Follow the vehicle manufacturer’s instructions for lug nut tightening
sequence, torque specifications and, if applicable, retorque requirements.
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