Mercury YL2Z-1V102-CA Hub And Disc Assembly

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The hub and bearing assembly is a sealed unit and isn't serviceable; if defective, it must be replaced. Begin by putting the vehicle in gear, applying the parking brake, and breaking loose the driveaxle/hub nut with a socket and large breaker bar. Loosen the wheel lug nuts, raise the vehicle, and support it securely on jackstands, ensuring that if equipped with Automatic Ride Control (ARC), the air suspension switch is turned to the OFF position before raising the vehicle to prevent damage to the system components. Remove the wheel and the driveaxle/hub nut, then unbolt the brake caliper and hang it out of the way with a piece of wire before removing the caliper anchor bracket and the brake disc. For models with 4-wheel ABS (4WABS), detach the disc splash shield from the steering knuckle by removing three bolts, then take out the speed sensor retaining bolt, remove the sensor from the knuckle, and set it and the wire harness aside safely. Next, remove the hub assembly-to-steering knuckle bolts, tap the hub assembly from side-to-side to break it loose from the steering knuckle, and pull the hub assembly off the end of the driveaxle, wrapping the end of the driveaxle with a rag to prevent damage. If the hub is stuck on the splines, use a puller to free it. For installation, reverse the removal procedure, ensuring to lubricate the driveaxle splines with multi-purpose grease and tighten all fasteners to the specified torque.

Visually check the disc surface for score marks and other damage. Light scratches and shallow grooves are normal, but deep score marks over 0.015-inch require disc removal and refinishing by an automotive machine shop. Both sides of the disc should be checked, and if pulsating is noticed during braking, disc runout should be suspected.

Visually check the disc surface for score marks and other damage. Light scratches and shallow grooves are normal after use and may not always be detrimental to brake operation, but deep score marks over 0.015-inch require disc removal and refinishing by an automotive machine shop. Be sure to check both sides of the disc. If pulsating has been noticed during application of the brakes, suspect disc runout.

Use a puller to free it.

1. Loosen the front wheel lug nuts, raise the vehicle, and support it securely on jackstands. Remove the wheel. 2. Remove the brake caliper and the brake disc. 3. Install the hub-lock removal clips and the hub-lock puller. Align the puller with the three slots in the hub lock and hand-tighten the set screw on the side of the puller. Screw the slide hammer into the puller and remove the hub lock assembly.

Disc thickness should be checked using a micrometer.