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I've got a 1994 IRS in my workshop at the moment. It has the dreaded rear end clunk on the RH side. I thought it was the diff side bearings but upon closer inspection I was pleased to learn it was the lower outer fulcrum bearings. I thought it would be a quick and simple fix because I keep most XJ bearings at hand.
Upon inspection of the bearings that were on the car I noticed they didn't seem to match what I had at hand or what was in the parts catalogues I had available to me for ordering. So I had to carefully clean the bearing to get a part number.
These bearing are interesting becasue the bearing itself has the seal integrated. On all other IRS's I've seen there was a cotton or neoprene seal and a spacer after after the bearing upon which the seal rode. The lower fulcrum doesn't move all far and I suspect they don't need doing often.
The Part number on the seal is LM11900L
LM11949L = Roller taper bearing with seal
LM11910 = Standard Race
I'm a bit fascinated by these bearings. I haven't seen a new 'Made in USA' Timken bearing for a long time. And they were priced accordingly or about 10x when compared to the made in China SKF bearings that don't have the integrated seal.
SO how were these fitted, please? Does the outer race fit into the eyes on the wishbone?
These must be an aftermarket idea, as the JCP lists exactly the same needle roller bearings for the latest models as for the earlier ones.
When I rebuilt my diff with the TrueTrac, by the way, the guys at Drive Train Specialists near Detroit supplied USA made Timkens for the carrier bearings, so they must be making some in the USA still, I am glad to say.
Last edited by Greg in France; Feb 9, 2023 at 01:28 PM.
I have always used USA Timkens in aviation when I worked on things with wheels. I didnt know they were hard to find. Those bearings still look good apart from the crush damage on the rubber. I'm gonna jot this down as an interesting option for the future.
SO how were these fitted, please? Does the outer race fit into the eyes on the wishbone?These must be an aftermarket idea, as the JCP lists exactly the same needle roller bearings for the latest models as for the earlier ones.When I rebuilt my diff with the TrueTrac, by the way, the guys at Drive Train Specialists near Detroit supplied USA made Timkens for the carrier bearings, so they must be making some in the USA still, I am glad to say.
There is nothing special here, nor is it a bodge. Those are the standard bearings for the late hubs with outboard disc brakes. That part of the rear suspension is completely different than the early hubs, and isn't interchangeable AFAIK. It shares commonality with the XJ40.I found that some of the aftermarket bearings sold for the late hubs do not fit correctly. You can't set the preload with the spacers that go on the end of the tube that goes thru the center of the bearings as the bearings are too thick. The only bearings that I found fit and allowed use of the preload spacerscorrectly are originals from Jaguar. Jon
There is nothing special here, nor is it a bodge. Those are the standard bearings for the late hubs with outboard disc brakes. That part of the rear suspension is completely different than the early hubs, and isn't interchangeable AFAIK. It shares commonality with the XJ40.I found that some of the aftermarket bearings sold for the late hubs do not fit correctly. You can't set the preload with the spacers that go on the end of the tube that goes thru the center of the bearings as the bearings are too thick. The only bearings that I found fit and allowed use of the preload spacerscorrectly are originals from Jaguar. Jon
My mistake, I had misread the OP's post and had not realised it was the outer fulcrum bearings he was referring to.
Interesting JAG IRS lower fulcrum bearings
