Common Knowledge about Front Wheel Bearings (1)

Aug 7
14:26

2013

Olivia Tong

Olivia Tong

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Believe it or not, many of the questions I field from Mustang owners concern wheel bearings, either directly or indirectly. Yet we see very little in the way of written material on them in the Mustang magazines. So I decided to do an article on them for the Mustangs Plus Newsletter.

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Believe it or not,Common Knowledge about Front Wheel Bearings (1)    Articles many of the questions I field from Mustang owners concern wheel bearings, either directly or indirectly. Yet we see very little in the way of written material on them in the Mustang magazines. So I decided to do an article on them for the Mustangs Plus Newsletter.

 

I'll cover front wheel bearings in this issue and rear wheel bearings in the next issue. Yes, I know. Wheel bearings sound boring. But stay with me here! Knowing a few things about wheel bearings can help you with many things, from safety to gas mileage.

 

The front wheel bearings used on our classic ‘65 to ‘73 Mustangs, as well as most other American cars of the era, are all of the same design. However, because of model changes and manufactures upgrades, slight differences mean that they are not all interchangeable. Diameters, both inside and outside, are usually the relative differences.

 

Each front wheel has two wheel bearings; an inner and an outer. The inner bearing is the larger of the two. Front wheel bearings are of the "cone" variety, consisting of two pieces called a bearing and a loose race. The "loose race", as we call it because it is a separate piece from the actual bearing, is flat on one side and has a tapered face on the other where the roller bearings ride. The loose race presses into the front wheel hub.

 

The brake drum, if you have drum brakes, or the brake rotor, if you have disc brakes, is attached to the hub. The loose race is designed to be a very tight fit and taking care not to damage it during installation is a must. Once it is installed, and you've made sure that it's all the way down in the hub, you're done with the loose race until the next time you change wheel bearings.

 

The other part of a front wheel bearing is the actual bearing itself. The bearing is made up of three parts. An internal race, the roller bearings, and a cage. Like the loose race, the internal race has a tapered face and this is where the roller bearings ride.  

 

The roller bearings are held in place by a window mesh liner called the cage. The cage has three functions, To keep the roller bearings held to the internal race so that they can not fall out during installation, to keep the roller bearings the proper distance from each other during operation and to allow the proper amount of grease to stay in the bearing while it is in operation.

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