Why is it important to clean the hub and rotor?
Rust and corrosion can build up on the surfaces between the hub and rotor. Removing the wheel can loosen corrosion, constantly changing contact areas. Cleaning the corrosion from the wheel, rotor and hub is also important to prevent “wheel offs.”
When to change the position of a rotor?
Checking bearing flange runout should be performed after friction surface runout. Changing the rotor position 180º on the bearing can check flange runout. If the high spot changes 180º, the rotor could be OK or ready to turn after the bearing is shimmed. Cutting a rotor in one pass is essential for productivity.
Where do you remove the rotors from a car?
These are in the center of the hub or knuckle on the axle or spindle. You may, for example, need to remove a metal dust cap, cotter pin or un-clinch a keyed flange and/or castle nut, and bearing to allow the rotor to be removed. Be careful to not get dirt in the bearing.
Can a lathe be used to replace a rotor?
The main advantage of these lathes is that they are able to cut a rotor in its operating plane. This means that the rotor is machined to match the hub. Even if you use new rotors, your chance of a pulsation comeback could be greater than if you left the old rotors on the vehicle.
What happens when you remove a wheel hub?
Failing to Inspect the Bore and Measure Flange Runout When you have a failed wheel hub, it’s possible that the bore of the knuckle is damaged, too. That can cause premature wheel bearing failure. When the old hub is removed, use the opportunity to inspect the knuckle for damage.
Why does my GMB wheel hub keep running out?
If you take the time to verify the hub before installation, any other runout issues will be easier to troubleshoot. For example, if the rotor shows runout when it is re-installed, you’ll know that either: The rotor is bad. The interface between the rotor and hub has rust or debris causing the runout. 5.
What can cause a wheel bearing to fail?
When you have a failed wheel hub, it’s possible that the bore of the knuckle is damaged, too. That can cause premature wheel bearing failure. When the old hub is removed, use the opportunity to inspect the knuckle for damage. Look for corrosion and make sure a bore gauge rotates in the bore without any trouble.
What should my hub runout be before replacing it?
Also, before installing the new hub check it’s runout. As a rule of thumb, on a modern vehicle, hub runout should be between .000″ and .0015″. If you take the time to verify the hub before installation, any other runout issues will be easier to troubleshoot.
Why do brakes need to be matched to the hub?
Whether reusing the existing or replacing with new rotors, they must be matched to the hub due to run-out variations between the hub and rotor utilizing an on-vehicle brake lathe, see Figure 1. Not performing the correct procedures can cause brake pulsations, inevitably leading to dissatisfied customers and comebacks.
What should I do before replacing my rotor?
Prior to matching rotors, whether reusing or replacing them, clean the hub and rotor surfaces. Rust and corrosion can build up on the surfaces between the hub and rotor. Removing the wheel can loosen corrosion, constantly changing contact areas. Cleaning the corrosion from the wheel, rotor and hub is also important to prevent “wheel offs.”
When to replace a broken wheel hub assembly?
Once again, broken wheel hub assemblies should be replaced in pairs on the same axle. 4. Clicking sound from the wheels Finally, if you hear a clicking sound that increases in speed as the vehicle accelerates, this could be a problem with the wheel hub assembly as well.
What’s the best way to replace a brake rotor?
Replace the Brake Rotor: Some brake rotors are held to the bearing hub with a mounting screw or sheet metal clip on the wheel stud. Use a screwdriver or impact screwdriver to remove the screws. There also may be sheet metal clips that can be removed with a pair of side cutters (dikes). These clips can then be discarded.
Once again, broken wheel hub assemblies should be replaced in pairs on the same axle. 4. Clicking sound from the wheels Finally, if you hear a clicking sound that increases in speed as the vehicle accelerates, this could be a problem with the wheel hub assembly as well.
How can I tell if my car rotors are bent?
It’s usually pretty easy to check for bent wheels/rotors. Figure out a way to hold the tip of a pencil about a mm from the rotor (or wheel) surface – clip the pencil to a footstool or something – then hand rotate the wheel to see if that 1 mm dimension stays more or less the same for all 360 degrees of wheel rotation.
What to do about vibration after changing rotors?
The new rotors are coated with an anti-rust material that must be completely removed, otherwise it will embed in and contaminate the brake pad surfaces. kurtwm1June 24, 2017, 11:20pm