Maintaining the firm connection of the wheels to a car's chassis is crucial in giving customers a trouble-free ride. Made of either plastic or metal, wheel hubs contain the wheel bearings which allow the wheels to move freely. The hub also protects the bearings from getting marred by dirt. Despite its durability, however, the wheel hub is still prone to damage. If customers are complaining of steering wander and grinding noises while they drive, chances are the hub needs replaced.
Timken Co. (
www.timken.com) offers the following frequently asked questions concerning hub assemblies:
1. Why are more vehicles using hub assemblies today?
Hub assemblies are unitized, maintenance free and non-serviceable units that are preset, pre-greased and pre-sealed, making installation easier and increasing product reliability for enhanced performance. These hubs require no maintenance or handling, which eliminates the need for preventative maintenance, grease and/or future adjustments.
2. Are all aftermarket hub assemblies created equal?
The hub assemblies sold by Timken meet or exceed original equipment specifications. Other hub assembly suppliers might meet the dimensional measure requirements for original equipment specifications, but
they do not match the material and/or performance standards.
3. Can I use an impact wrench to remove or install a hub assembly?
While it may appear to be easier to use an impact wrench, it is not recommended. We recommend the use of a certified, calibrated torque wrench. Impact wrenches can damage the axle nut, threads and components. It can also create a false sense of security when adjusting a nut or bolt, which may be under- or over-torqued. This can leave a hub assembly susceptible to failure.
4. Do I need to torque the axle nut and/or the lug nut?
Yes. It is imperative that you follow the manufacturer’s specifications and/or instruction manual to ensure the hub is installed correctly. Failure to follow the manufacturer’s installation instructions and follow the proper installation procedures can cause equipment failure, creating a risk of serious bodily harm.
5. Can I replace the bearings or seals in my hub assembly?
No, because the hub assemblies are unitized, maintenance free and non-serviceable. Most hub assemblies are designed with a unitized bearing or flange that is intricate to the hub and/or bearing housing, which are not replaceable.
6. Do wheel studs come with all hub assemblies?
No. While most hub assemblies do include the wheel studs, there are some that do not. Timken does not recommend reusing the old studs with the new hub assembly.