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Resurrecting an old thread to say thanks... That part number is more than a little useful to have.
BCA is or was a US manufacturer.
Supposedly the rear bearings are 510013. The same part Ford used in the mid 90's Escort/Tracer front hubs.

Here's another thread with more aftermarket part numbers. Common polaris part ##'S

Something that most people don't think about is the fact that bearings and other parts like it are not usually special order for a small volume manufacturer like Polaris.
You have to have production levels like Nissan, Toyota, Fuji Heavy Industries, VAG Gruppe, General Motors, Chrysler, and Ford Motor Company to make ordering special bearings and seals worthwhile. Those heavy hitters don't even do it that often if at all. Parts that are produced in multi-million and larger lot sizes give a manufacturer economy of scale that their own production numbers wouldn't provide.
 

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hatzie what I have always wondered about automotive bearings is are they sealed. if so then awesome if not then I wouldn't use them.
 

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hatzie what I have always wondered about automotive bearings is are they sealed. if so then awesome if not then I wouldn't use them.
These are generally rubber sealed cartriges. The line catalog will state what they are.

510014 is a Double Row Rubber Sealed Ball Bearing. ID 35mm x OD 64mm x W 37mm.
510013 is a Double Row Rubber Sealed Ball Bearing. ID 43mm x OD 79mm x W 41mm. Tell the auto parts guy you need front wheel bearings for a 1991-2003 Ford Escort or Mercury Tracer.
BCA, FAG, SKF, and NTN are usually Western manufactured... I include Japan, South Korea, and Taiwan as Western manufacturers as the products coming from those countries seems to be equal to Europe and North America. National and Timken are a crapshoot... I've bought Timken Taper Bearings with USA or Canada etched on them and passed on others made in China.


For those that use the grease injectors it's good to know the manufacturers use polyurea compound grease in these double row ball bearings.
DO NOT MIX Polyurea with other grease types. The urea compounds will cause problems with other grease types. Mixing grease types generally is not a good idea.
Chevron SRI-2 is polyurea grease but there are others. The spindle bearings in my Bunton commercial walk behind mower use this grease. The owner manual states that you shouldn't mix grease types in the spindle housings.
Here's a link to an article on the subject of mixing greases in maintenance of industrial machinery. How to Determine Grease Compatibility and Why It's Important
 

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damn!!!!! wow Hatzie you just gave me an education and some homework!!!! thanks man!!!
 

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Could always go to www.cheapcycleparts.com
Good schematics with part numbers
Yes. You can always buy Polaris branded parts from a Polaris parts dealer. CheapCycleParts is a Polaris parts dealer.
Polaris branded parts are made by any number of suppliers. Many of them in China of dubious pedigree at best.

Polaris has every reason to want the older machines to wear out and replacement parts to fail in a shorter time than the originals but not so soon that we notice.
The goal is to annoy us with the "old and unreliable machine" so we will buy newer models.

It's called planned obsolescence and it's a very real manufacturers tactic. Appliance and automobile manufacturers have it down to a science.

If we know what the bearings industrial numbers are we have the possibility of going to the local auto parts supplier or a bearing house so we can buy known decent or high quality parts.
 
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