ISUTAMI BEARINGS
en
Hub Unit Bearings: Features, Maintenance, Installation & Removal
ISUTAMI BEARINGS

Hub Unit Bearings: Features, Maintenance, Installation & Removal

Hub units are gaining increasing acceptance in automotive applications, resulting from the integration to various levels of the bearing wheel hub and knuckle assembly.

Hub unit bearings have to meet increasingly strict requirements that demand lighter weight, greater promotion of fuel efficiency, and enhanced module production systems. Along with the widespread adoption of antilock braking systems (ABS) to ensure stable maneuverability during braking, there is a growing need for our hub unit bearings with a built-in sensor. ISUTAMI offers a range of high quality hub units with ABS sensors.


Features
On the course of development of hub units, there appears three different generations: The first-generation hub unit (Hub I), second-generation hub unit (Hub II), and third-generation hub unit (Hub III). These three generations vary according to the integration of the bearings and their peripheral components. Below we will discuss the features of the three generations.


Maintenance
Maintenance is the key factor to the life span of hub units. Hub unit bearing maintenance generally means keeping them lubricated. This service is done by removing the wheel bearing from the wheel hub assembly, greasing it manually or with a device called a wheel bearing packer, and then reinstalling it. Some vehicles do not have removable wheel bearings. The wheel bearings are sealed in the hub. In this case, you will need to purchase a new wheel hub bearing.

If your vehicle requires periodic wheel bearing maintenance, it is essential you keep to the maintenance schedule. Over time, the grease in your wheel bearings can breakdown and become less effective. Also grease can escape through the bearing until there is not enough left to lubricate the bearings.

Without proper lubrication, the wheel bearings could overheat. When that happens, your wheels could fall off. (This is unlikely, and will only happen in extreme cases when the wheel bearing problem has been ignored.)

Warning signs include a wobbly wheel or a low growl or hum coming from any of your wheels. In either case, you should replace your bearings yourself, or take our bearings to a local repair shop.

The following are some advices on removing and installing hub unit bearings properly to enhance the performance and longevity of hubs and benefit the axles and wheels, if you wish to replace the bearings yourself.

Hub Unit Bearing Removal
1. Begin by raising the vehicle up and removing the lug nuts and the wheel.
2. Remove the brake caliper and rotor. The caliper should be supported and not hanging freely.
3. Next, the axle nut needs to be removed using an axle nut socket. The vehicle manufacturers instructions should be used to determine proper nut replacement.
4. If possible, disconnect the ABS sensor wire from its mating connector point. This is usually located in the wheel well or on the chassis frame. Also, disconnect the sensor wire from the clips that are used to properly position the sensor wire in the wheel frame. Before removing, be sure to make note of the current orientation and positioning of the sensor wire and bearing.
5. Remove the bolts that attach the bearing to the steering knuckle. A puller may be needed to remove the hub assembly from the knuckle. Be careful not to damage the knuckle or axle shaft.

Hub Unit Bearing Installation
First, insert the new hub assembly into the steering knuckle. Check the positioning of the splines on the axle shaft as the hub assembly is inserted into the knuckle. Carefully position the two components so the splines are not damaged during the installation. Never force the hub assembly on the shaft and never hit it with a hammer or other tool.
Related News
  • Conveyor and material-handling trends

    Conveyor and material-handling trends

    April 21, 2019BY LISA EITEL Conveyors are at the heart of an array of exciting changes in material handling — from the vast installations of automated warehousing to humbler stations only recently automated. Each ...view
  • Maintenance of the Temperature Generated by the Use of Pillow Block Bearings

    Maintenance of the Temperature Generated by the Use of Pillow Block Bearings

    April 4, 2019Generally speaking, the installation and operation of pillow block bearings will increase for a period of time, and then at a lower temperature (usually 10-40 degrees higher than room temperature) in ...view
  • Bearing Housing Seal Upgrades Improve Pump Reliability

    Bearing Housing Seal Upgrades Improve Pump Reliability

    August 30, 2018One of the leading causes of pump break downs is bearing failures. This is because fewer than 10% of all ball bearings run long enough to succumb to normal fatigue failure (20,000 hours for an ANSI Pu...view
  • Analysis Of China Bearing Industry In 2011

    Analysis Of China Bearing Industry In 2011

    August 30, 2018OverviewAccording to the statistics supplied by China Bearing Industry Association after their research on the key bearing enterprises, the total sales value of China' s bearing industry in 2011 reach...view
  • Bicycle Headset Bearings

    Bicycle Headset Bearings

    February 26, 2019The headset is the set of components on a bicycle that provides a rotatable interface between the bicycle fork and the head tube of the bicycle frame itself. The short tube through which the steerer o...view
  • Matters Needing Attention in the Use of ATV Wheel bearings

    Matters Needing Attention in the Use of ATV Wheel bearings

    April 4, 20191. In order to ensure safety and reliability to the greatest extent, it is recommended that ATV wheel bearings should be checked regularly no matter how old they are, and that early warning signals of...view
  • TEL:+86-574-6399-8066
  • FAX:+86-574-6399 8025
  • EMAIL: sales@isutami.com
  • ADDRESS:No.500, North 3rd Ring Road West, Cixi, Ningbo, 315300, China