One piece rear axle upgrade

[Old Dog]

yes that sounds about right.

 

[combs617]

So the different installation instructions that I have read, state the race should protrude from the tube a min. .020 from the tube. My race sits inside the tube.

Am I missing something

 

[combs617]

or is the bearing to protrude from the tube when siting in the race?

 

[tarry99]

So the different installation instructions that I have read, state the race should protrude from the tube a min. .020 from the tube. My race sits inside the tube.

Am I missing something

Combs

Normally the race does stick out and then your bearing retainer that is pressed onto the axle already gets adjusted to the proper pre-load by adding shims that range from.003-.010 thousands of an inch.
Your race or cup looks interesting in it's current position , because the bearing should fit all the way into the taper and hence is stopped by the two tapered bearing surfaces coming together...........it almost looks like the bearing may not go all the way in and could get stopped by the ring that is hammered up......hard to tell from my view.
That ring should be what sets the race in the proper position but should not allow any contact with the rolling bearing surface. Once in the shims would be added or subtracted to finish the pre-loading.
That ring may be the wrong size? What does your instructions say about that ring and how that is supposed to be set up?

 

[combs617]

Tarry, can you help me understand " preloading?

Where are the shims installed?

So when the new bearing is pressed onto the shaft, is it pressed to a stop/shoulder or?
when the retainer ring is pressed on, is it pressed up against the bearing or is there some wiggle room?

Thank you for your Help
Aaron

 

[Purple77CJ7]

Tarry, I am really looking for how to pull the spacer the is in the axle tube in front of the inner seal

This is the tool I use to pull the seal and spacer out. A three jaw puller has not worked for me, it pulls through and tears the inner seal. Then you have nothing to hook to. This tool fits behind the seal.

OTC OTC Rear Axle Bearing Puller Set - OTC7494A - Tools - Mechanics & Auto Tools - Automotive Specialty Tools

This fits on a slide hammer.

 

[combs617]

Can anyone identify this axle. I want to order the bearing replacement kit, but want to order the right one.

 

[1986cj7]

Can anyone identify this axle. I want to order the bearing replacement kit, but want to order the right one.

It's hard to identify by pictures alone, but I have moser axles in mine that are about 1 1/2 years old and mine has a extra circle about 2 inches in diameter machined into the middle around the same smaller hole that you have in the middle. So unless it is an older stye of moser axle I don't think it's a moser. Are there no numbers stamped on the back side of the axle behind the brake asmbely?

 

[tarry99]

Tarry, can you help me understand " preloading?

Where are the shims installed?

So when the new bearing is pressed onto the shaft, is it pressed to a stop/shoulder or?
when the retainer ring is pressed on, is it pressed up against the bearing or is there some wiggle room?

Thank you for your Help
Aaron

Aaron,

Pre-loading is perhaps not the correct term in your case since the bearing is allowed to have some positive end clearance in the amount of approximately .005-.010 thousands depending on manufacture which is accomplished via using shims or correctly measuring the housing and cutting the spacer at the correct dimension prior to the install.

The shims are at the end of the axle between the axle flange and the 4 bolt retainer that holds the axle in place.

Without knowing what axles you have may prove this whole discussion fruitless. Some older one piece kits used the shims , but some of the newer versions I'm understanding do not............As I mentioned before the spacer behind the Race is something that could or should have had a need to be machined to a correct depth to set up the correct axle bearing clearance. Of course all of these dimensions would have had to be taken and understood prior to the first attempt at the install.

Yes on the bearing pressed on to the axle......there is a stop machined that the bearing butts up against. The retainer should be pressed up against the bearing.

Your at a point I believe that you must take everything apart. Then take dimensions and understand what the spacer depth needs to be to put your bearing in the correct location in regards to the axle housing.
You have one other problem that was mentioned before in that if the axle housing bearing race cavity is "loose" that should also be addressed somehow as the race needs to be tight enough in the housing to allow the bearing to do its job.

 

[Old Dog]

or is the bearing to protrude from the tube when siting in the race?

Yes the end of the bearing and race put together should stick out .020-.060 accouding the Superior Axle.