Wheel Bearing Races?, Do I need outer and inner races for wheel bearing? Options

[dangqiwu]

I bought a Timken front wheel bearing for my 1995 Toyota Celica ST. And I bought inner and outer seals too.
But in the service tech manual I found the outer and inner race, snap ring, and dust deflector. I don't have these on hand.
Someone said the races come with the bearing so that I don't bother to buy more races.

Could anyone clarify this idea? Do I need to buy additional outer and inner races, snap ring, and dust deflector?

Thank you!





This post has been edited by dangqiwu: Jan 2, 2013 - 11:25 PM

[azian_advanced]

You can use the existing snap ring and dust deflector.

[Langing]

You can use the existing snap ring and dust deflector.

What you say may be true and people may actually reuse their snap rings and dust deflectors, but I note (for accuracy) that (at least for the 1994 Celica) the FSM (SA-12) declares that the snap ring, dust deflector, oil seals, and wheel bearing are all NON-REUSABLE parts, so they are saying that all should be purchased when replacing a bad front wheel bearing.

It would be surprising to find anyone who thought they could re-use their bearing or oil seals, but the snap ring and dust deflector might not be so readily apparent to them.

I can give you one example of a need to buy a new dust deflector. Recently, I planned on re-using my dust deflector when reassembling my front axle hub assembly, and I got the chance to try it out this past weekend. From initial use, or cleaning, the dust deflector had become no longer a "press fit" part; it kept falling out with the slightest pull. I suspect Toyota wanted to make sure that dust deflectors, as installed, have the capacity to remain in place while the front wheel rolls on into the future over many a bumpy road.

As to the snap ring, there is perhaps a similar rationale. It is installed to retain the bearing from moving inward from its pressed fit seat. But, that's all I know for certain. If a snap ring were to come loose from being too tightly squeezed (deformed) during bearing replacement, I find it hard to imagine what damage that could cause. Could such a tightly pressed part as a wheel bearing be caused to move inward along the hub spindle? And what damage could that movement cause? After all, it is just one press fit that keeps the hub, and therefore the tire on the car. If there was no snap ring, the tire would be held on by two press fits, and maybe that's the problem, but who knows for sure? And who knows why the front axle hub assembly was designed the way it was? But all of these parts, as an assembly, form a major element of a driver's safety. A loose snap ring might also move away from the bearing and somehow mess up the oil seal? Hey, it's hard to know all the reasons behind what Toyota says in its manuals are legit. But for DIY people, its all we've got.