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Unit Bearings in Four Wheelers

Unit Bearings in Four Wheelers

  • Friday, 09 October 2020
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Unit Bearings in Four Wheelers

They are used in almost every late model Jeeps and pickups because of their longer service life and very inexpensive costs. A front-axle drive flange isn't necessarily a heavy duty unit bearing either. Many full-time four-wheeler trucks have used full-time drive flanges for many years because of the lower maintenance requirements, better lockable hubs, and ability to keep track of more vehicles in less space.

Some full-time truckers still use drive flanges but they don't lock as well, they don't lock all of the way, and they don't lock in all of the places that they should. But it wasn't until the pickup truck industry moved on to lockable hub designs that many full-time four-wheeler owners switched to unit bearing units. But when the new-ruck industry moved on from lockable hub designs some 20 years back, it moved to the unit bearing design to reduce labor, reduce costs, and to allow for better service. Today, you will find heavy duty four-wheeler trucks, with high speed engines, that use only unit bearings.

The main difference between a full-time drive bearing and a unit bearing is that the former is locked, while the latter is not. The unit bearing is a single piece metal part with several metal balls. If one ball of the unit bearing moves to another position, the next ball will automatically lock in position. In other words, if you lock a drive bearing into place it will stay locked. Units can be locked for a few hours or even for several days, depending on what is best for the job.

The most common type of unit bearing used on front axles is an aluminum unit. It is available in a wide variety of configurations and designs, including a front-axle seal, a front seal, and a sealed axle seal. A sealed axle seal is installed just below the axle flange and it prevents air from getting under the bearing if the bearing starts to leak. and causing damage to the bearing and the vehicle.

Most full-time four-wheeler trucks still have a drive bearing but they use a rear-axle seal instead of a front seal. The rear seal is installed just above the top surface of the bearing, just above the hub, and it seals the top surface and axle flange. to prevent air from getting under the bearing and causing damage to the bearing and the vehicle. This type of bearing also has a lockable hub. If the hub doesn't seal, it won't lock, so you can lock the hub in place without having to remove the axle seal.

A rear seal is used mostly on Jeeps and trucks with more powerful engines. It also has the added benefit of providing extra locking strength for any bearing problems that may arise over time. These types of units are usually less expensive and need less maintenance than the heavy duty drive bearing.

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