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Tech Bulletins

HUB AND BEARING ASSEMBLIES INSTALLATION PROCEDURES

The installation process for a hub can differ depending on what generation it is.
For a Generation 1 FWD Hub Assembly, here are the basic steps for installation:
  1. Inspect all components for signs of fatigue or damage. Any irregularities could possibly cause premature failure, so replace if there is any doubt.
  2. The axle nut needs to be loosened while the vehicle is still on the ground. The old nut should never be re-used. Never use an impact gun on the axle nut.
  3. To avoid damage to components, be sure to use the proper tools to remove any component.
  4. Clean the bearing area hub to assist with smooth insertion. A light coating of lubricant can be applied to help ease the insertion.
  5. When press-fitting the bearing into the knuckle, be sure to apply pressure only to the outer ring. When pressing the hub into the inner ring, force must only be applied to the inner ring and the hub, not the outer ring. The inner ring must always stay in the same orientation as the outer ring. Applying force to the wrong part of the bearing could severely damage the balls and raceways. You can check for any damages by rotating the bearing to see if it turns smoothly. Press-fitting only locks the bearing radially. In order to lock it axially, install a snap ring where it is required.
  6. Manufacturers recommend replacement of the CV Joint boot after 60,000 miles.
  7. Lightly lubricate and then carefully align the splines of the CV shaft with the splines of the hub and pull the axle yoke into the hub and seat against the bearing. Install a new axle nut and fasten it using the specific torque nut for that application. With the vehicle on the ground, do a final fastening to the OEM torque specifications. For specific mounting instructions, Alltech suggests to refer to the vehicle manufacturer’s service manual for that model.
For a Generation 2 FWD Hub Assembly for Rear application.
  1. Lift vehicle and remove rear wheel(s). Remove axle nut. Alltech suggests replacing the axle nut.
  2. If equipped with disc brakes, remove disc brake caliper from back plate and disc rotor from hub
  3. If equipped with drum brakes, remove brake drum from hub and disconnect brake pipe from wheel cylinder.
  4. Disconnect ABS speed sensor if equipped.
  5. Remove hub-mounting bolts. Remove rear brake shoes, stabilizer bar or other components that may interfere with hub removal.
  6. Remove hub separating axle hub and bearing if needed.
  7. The installation is done in the reverse order. Make sure the mounting surface is clean and check to see if other components have any damage or irregularities. Use torque specifications as recommended by that vehicle’s manufacturer’s service manual.
  8. Two piece axle and hub assemblies may need to be pressed apart.
  9. Some models equipped with ABS tone rings may require the tone ring to be switched over from the old hub unit to the new hub unit.
For a Generation 3 FWD Hub Assembly for Front Application

  1. Lift vehicle and remove front wheel(s) and remove caliper to set it aside.
  2. Remove brake disc rotor. Remove cotter pin and axle nut. Alltech suggests that the axle nut be replaced.
  3. On models equipped with ABS, disconnect sensor connector.
  4. Using a steering linkage puller, loosen the upper arm ball joint nut. If a toothed rotor is quipped, it is very important to be careful not to damage the ball joint. Shift knuckle to outside to maintain clearance between hub mounting bolts and drive shaft.
  5. Remove hub mounting bolts. Remove front hub assembly. Check the components for any damages or irregularities.
  6. The installation is done in the reverse order. Make sure the mounting bolts are installed to the manufacturer’s torque specifications. Alltech suggests the use of torque specifications as recommended in the vehicle’s manufacturer’s service manual.