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What is a Wheel Hub?

 What is a wheel hub? How to check a
 hub bearing unit? And How to install
            a Wheel Hub?

source: http://www.buyautoparts.com/howto/repair-wheel-hubs.htm
What is a
 Wheel
 Hub?




   source: http://www.buyautoparts.com/howto/what-is-a-wheel-hub.htm
What is a Wheel Hub?
• A wheel hub is the mounting assembly for the wheel of a vehicle, it houses
  the wheel bearing as well as supports the lugs. Most newer vehicles will
  also have a speed sensor and ABS sensor attached to the unit through an
  electrical connector. The function of the wheel hub is to keep the wheel
  spinning freely on the bearing while keeping it attached to the vehicle. The
  wheel hub is the only part that actually holds the wheels to the car so it is
  very important that special attention be paid when these parts are being
  installed.




     source: http://www.buyautoparts.com/howto/what-is-a-wheel-hub.htm
Checking
  A Hub
   Unit
 Bearing


          source:
http://www.buyautoparts.c
om/howto/checking_a_hu
    b_unit_bearing.htm
Checking A Hub Unit Bearing
• It can be a challenging task to properly diagnose a damaged hub unit
  bearing. This information will help you to recognize common causes of
  noise generation and know how to examine a hub unit bearing.
• The first step is to verify the source of any unfamiliar noise. Often this can
  be attributed to road surface conditions such as newly paved roads or
  roads with uneven surface characteristics, which can cause unusual and
  intensified noises. The thread design, composition and wear patterns of
  vehicle tires can be another source of unfamiliar noise. Unusual wear
  patterns are generally caused by lack of tire rotation poor alignment,
  improper pressure or worn suspension parts. After eliminating noise
  generation caused by road surface conditions, tire design and wear
  patterns, it’s time to make a more detailed examination of the wheel
  assemblies as well as the hub unit bearings.


 source: http://www.buyautoparts.com/howto/checking_a_hub_unit_bearing.htm
Checking A Hub Unit Bearing, cont.
• Prior to checking a hub unit bearing, make sure you have the proper tools.
• Perform a hand rotation check on the wheel. Next, grasp the wheel at the
  3 o’clock and 9 o’clock positions. Push while oscillating and also pull while
  oscillating the wheel. Perform a second check, following this same
  procedure, grasping the wheel at 12 and 6 o’clock positions. In addition,
  listen and feel for roughness. After making all preliminary inspections,
  check the hub unit bearing more precisely.
• If applicable, remove the wheel cover to access the lug nuts. Remove the
  lug nuts and the wheel and tire assembly. Next, remove the caliper from
  the caliper mounting bracket. To prevent damage to the brake line due to
  the weight of the caliper, make sure the caliper is properly supported with
  either an “S” hook or a piece of wire.
• Remove the caliper mounting bracket and then remove the brake rotor.


 source: http://www.buyautoparts.com/howto/checking_a_hub_unit_bearing.htm
Checking
 A Hub
  Unit
Bearing…


        source:
http://www.buyautopa
rts.com/howto/checkin
g_a_hub_unit_bearing
        _2.htm
Checking A Hub Unit Bearing, cont.
• The next step is to inspect the hub unit by trying to wobble
  the unit by hand. If the unit is loose the bearing may be
  damaged, the axle nut may have backed off or the axle nut
  may not have been properly clamped.
• Check the gap on the hub and make sure the bearings internal
  clearance is correct. Next a dial indicator base should be
  secured before the test is begun. Now grasp the wheel hub at
  3 and 9 oscillating the hub side to side by about 90 degrees.
  Do this five times to properly set the bearings. Observe the
  indicator during this procedure and if it exceeds 0.004" then
  the hub bearing needs to be replaced.


source: http://www.buyautoparts.com/howto/checking_a_hub_unit_bearing_2.htm
Wheel
Hub Unit
 Install


        source:
http://www.buyautopa
rts.com/howto/wheel_
 hub_unit_install.htm
Wheel Hub Unit Install
•   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 units,
    bearings, axles, wheels, brakes, and other components. Following are guidelines for
    removing and installing a hub unit bearing 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 axles shaft while installing the
    steering knuckle. The proper positioning of these two components is critical so that the
    splines are not damaged. (Note: Never force the hub unit bearing onto the shaft or
    strike with a hammer.)
•   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 specifications 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.

source: http://www.buyautoparts.com/howto/checking_a_hub_unit_bearing_2.htm
Wheel
Hub Unit
Install 2


        source:
http://www.buyautopa
rts.com/howto/wheel_
hub_unit_install_2.htm
Wheel Hub Unit Install 3
•   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 from debris and burrs.
    Install the brake rotor. Follow the vehicles 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, re-torque
    requirements.


source: http://www.buyautoparts.com/howto/checking_a_hub_unit_bearing_2.htm
Disclaimer
• Warning: Proper maintenance and handling
  procedures are critical. Always follow
  installation instructions and maintain proper
  lubrication. Never spin a bearing with
  compressed air. The rolling elements may be
  forcefully expelled. This information is not
  intended to substitute for the specific
  recommendations of your equipment
  suppliers.
What is a Wheel Hub?
                                The End
For more Auto How To Tips visit, http://www.buyautoparts.com/howto/

If you need to purchase an auto part
- Visit www.buyautoparts.com
- Call 1-888-907-7225
- Or send an email to sales@buyautoparts.com




                               THANKS

     source: http://www.buyautoparts.com/howto/repair-wheel-hubs.htm

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What is a Wheel Hub?

  • 1. What is a Wheel Hub? What is a wheel hub? How to check a hub bearing unit? And How to install a Wheel Hub? source: http://www.buyautoparts.com/howto/repair-wheel-hubs.htm
  • 2. What is a Wheel Hub? source: http://www.buyautoparts.com/howto/what-is-a-wheel-hub.htm
  • 3. What is a Wheel Hub? • A wheel hub is the mounting assembly for the wheel of a vehicle, it houses the wheel bearing as well as supports the lugs. Most newer vehicles will also have a speed sensor and ABS sensor attached to the unit through an electrical connector. The function of the wheel hub is to keep the wheel spinning freely on the bearing while keeping it attached to the vehicle. The wheel hub is the only part that actually holds the wheels to the car so it is very important that special attention be paid when these parts are being installed. source: http://www.buyautoparts.com/howto/what-is-a-wheel-hub.htm
  • 4. Checking A Hub Unit Bearing source: http://www.buyautoparts.c om/howto/checking_a_hu b_unit_bearing.htm
  • 5. Checking A Hub Unit Bearing • It can be a challenging task to properly diagnose a damaged hub unit bearing. This information will help you to recognize common causes of noise generation and know how to examine a hub unit bearing. • The first step is to verify the source of any unfamiliar noise. Often this can be attributed to road surface conditions such as newly paved roads or roads with uneven surface characteristics, which can cause unusual and intensified noises. The thread design, composition and wear patterns of vehicle tires can be another source of unfamiliar noise. Unusual wear patterns are generally caused by lack of tire rotation poor alignment, improper pressure or worn suspension parts. After eliminating noise generation caused by road surface conditions, tire design and wear patterns, it’s time to make a more detailed examination of the wheel assemblies as well as the hub unit bearings. source: http://www.buyautoparts.com/howto/checking_a_hub_unit_bearing.htm
  • 6. Checking A Hub Unit Bearing, cont. • Prior to checking a hub unit bearing, make sure you have the proper tools. • Perform a hand rotation check on the wheel. Next, grasp the wheel at the 3 o’clock and 9 o’clock positions. Push while oscillating and also pull while oscillating the wheel. Perform a second check, following this same procedure, grasping the wheel at 12 and 6 o’clock positions. In addition, listen and feel for roughness. After making all preliminary inspections, check the hub unit bearing more precisely. • If applicable, remove the wheel cover to access the lug nuts. Remove the lug nuts and the wheel and tire assembly. Next, remove the caliper from the caliper mounting bracket. To prevent damage to the brake line due to the weight of the caliper, make sure the caliper is properly supported with either an “S” hook or a piece of wire. • Remove the caliper mounting bracket and then remove the brake rotor. source: http://www.buyautoparts.com/howto/checking_a_hub_unit_bearing.htm
  • 7. Checking A Hub Unit Bearing… source: http://www.buyautopa rts.com/howto/checkin g_a_hub_unit_bearing _2.htm
  • 8. Checking A Hub Unit Bearing, cont. • The next step is to inspect the hub unit by trying to wobble the unit by hand. If the unit is loose the bearing may be damaged, the axle nut may have backed off or the axle nut may not have been properly clamped. • Check the gap on the hub and make sure the bearings internal clearance is correct. Next a dial indicator base should be secured before the test is begun. Now grasp the wheel hub at 3 and 9 oscillating the hub side to side by about 90 degrees. Do this five times to properly set the bearings. Observe the indicator during this procedure and if it exceeds 0.004" then the hub bearing needs to be replaced. source: http://www.buyautoparts.com/howto/checking_a_hub_unit_bearing_2.htm
  • 9. Wheel Hub Unit Install source: http://www.buyautopa rts.com/howto/wheel_ hub_unit_install.htm
  • 10. Wheel Hub Unit Install • 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 units, bearings, axles, wheels, brakes, and other components. Following are guidelines for removing and installing a hub unit bearing 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 axles shaft while installing the steering knuckle. The proper positioning of these two components is critical so that the splines are not damaged. (Note: Never force the hub unit bearing onto the shaft or strike with a hammer.) • 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 specifications 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. source: http://www.buyautoparts.com/howto/checking_a_hub_unit_bearing_2.htm
  • 11. Wheel Hub Unit Install 2 source: http://www.buyautopa rts.com/howto/wheel_ hub_unit_install_2.htm
  • 12. Wheel Hub Unit Install 3 • 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 from debris and burrs. Install the brake rotor. Follow the vehicles 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, re-torque requirements. source: http://www.buyautoparts.com/howto/checking_a_hub_unit_bearing_2.htm
  • 13. Disclaimer • Warning: Proper maintenance and handling procedures are critical. Always follow installation instructions and maintain proper lubrication. Never spin a bearing with compressed air. The rolling elements may be forcefully expelled. This information is not intended to substitute for the specific recommendations of your equipment suppliers.
  • 14. What is a Wheel Hub? The End For more Auto How To Tips visit, http://www.buyautoparts.com/howto/ If you need to purchase an auto part - Visit www.buyautoparts.com - Call 1-888-907-7225 - Or send an email to sales@buyautoparts.com THANKS source: http://www.buyautoparts.com/howto/repair-wheel-hubs.htm