Hyundai 51750-24500 Front Wheel Hub Assembly

Due to the need for special tools to replace the hub and bearing assembly in the steering knuckle and to properly adjust the hub bearing preload, the steering knuckle and hub assembly must be taken to a dealer service department or other repair shop equipped with the necessary tools for this procedure. This procedure applies to 1995 and later models. On 1995 and later models, the hub and bearing must be replaced as an assembly. For rear wheel bearing check, repack and adjustment procedures on 1994 and earlier models. Loosen the rear wheel lug nuts, raise the vehicle and support it securely on jackstands. Remove the rear wheels. Remove the brake drums or discs. Using a hammer and punch or chisel, unstake the spindle nut. Remove the rear axle spindle nut and washer and pull the hub off the spindle. Inspect the grease seal for wear or damage. Rotate the wheel bearing and inspect for wear or damage. Inspect the wheel speed sensor rotor for damage. If any wear or damage is noted, replace the hub and bearing assembly. Installation is the reverse of removal. Tighten the spindle nut to the torque and stake the nut into the slot in the spindle. Disconnect the electrical connector from the ABS rear wheel speed sensor, if equipped. To detach the hub/wheel bearing unit from the rear axle assembly, remove the four hub retaining bolts. Installation is the reverse of removal. Be sure to tighten the hub retaining bolts to the torque.

Vehicle owners rarely need to service rear wheel bearings before changing their brake shoes yet they should visually inspect these components whenever lifting their vehicle for other reasons. The required tools for completing this job consist of a torque wrench and special grease. After supporting the vehicle with jackstands you must check each wheel by spinning it to detect noise as well as measure rolling resistance and verify freeplay operations. The spindle requires cleaning and grease application when wheel movement becomes noticeable under your hands during the in-and-out motion on the axle. The wheel removal comes first with optional parking brake adjuster disassembly for the repacking procedure. The dust cap must be removed from the drum/hub assembly while models with a castellated spindle nut require straightening of the cotter pin before its removal. Discard the existing pin and use a new one during reinstallation. The spindle nut and washer need removal to gain access for pulling the drum/hub assembly outward and freeing the outer bearing. Use a seal puller or screwdriver to remove the seal from the rear of the drum/hub after you pull the drum/hub off the spindle while documenting the installation orientation. Remove the inner wheel bearing as you cleanse every surface of old grease from the bearings hub along with spindle through solvent application while allowing parts to naturally dry. Check for cracks and heat discoloration and look at wearing on the bearings as well as examine races for damage. Defective components should be taken to a machine shop for new races. Start by filling wheel bearing grease into the bearings while pushing the grease between the rollers and cone and cage from their back face. Then give a thin grease coat to both the spindle along with bearing seats. At each inner bearing race you should apply a small portion of grease before creating a seal by fingering the opening to block any grease escape. Place the grease-loaded inner bearing at the rear of the drum/hub while adding more grease before using a new seal that requires tapping until the hub surface becomes flush. Set the drum/hub assembly on the spindle before inserting the grease-packed outer bearing correctly into position. The adjustment process includes fitting a washer followed by a spindle nut which you should tighten a little before rotating the drum/hub to settle the bearings and eliminate any remaining grease or burrs. The spindle nut should be tightened to 15 ft-lbs before you loosen it until it is effortlessly loose. Set the nut to a tight position and place the dust cap while adding a new pin and ensuring the flat face of one slot does not extend past the other by more than half thickness. Flattened ends of the cotter pins need to be aligned with the nut before carefully cutting away any extra length that remains. Put in the dust cap by gently tapping it and place the wheel onto the drum/hub securing the lug nuts. The final check of bearings can be performed by lowering the vehicle after placing both hands on the tire top and bottom then achieving the correct torque setting on the lug nuts.

The steering knuckle and hub assembly must be taken to a dealer service department or other repair shop equipped with the necessary tools for this procedure.

While the vehicle is securely supported on jackstands, spin the wheels to check for noise, rolling resistance, and freeplay. Any noticeable movement in the wheels should prompt a further inspection and potential repacking or replacement of the bearings.