I removed the axle bearings today and have some questions. Using my calipers, the rollers mic'd out at .495-.496 and otherwise look OK. I understand that these bearings should be usable. Should I also replace the sleeves to get a better fit? The bearings come out of the sleeves easily.
If the sleeves Show any wear I would. In my case the old sleeves COULD have been used in a pinch, but I was in it to totally rebuild it. Since I was able to locate some .498 .499 Hyatts I went with the newer hardened sleeves.
Ford specs called for 0.498" to 0.502" on new rollers, so it's possible that yours are worn only 2-3 thousandths from new. I wouldn't hesitate to use them.
I've often wondered about putting a sheet of .002 behind the sleeves to take up the wear that way. I haven't tried it, but thought of it.
I agree with R.V. Worn sleeves often show an unworn ridge that corresponds to the bearing cage. If you're unsure, the reproductions available seem to be good quality. With no evidence of wear, originals are good enough. You might check the axle shaft diameter for wear as well. The Model T rear axle was designed to operate with a lot of literal "wiggle room".
Sounds fine. You can shim the sleeves but for that clearance i don't think it'd be necessary.
When adding shim behind the sleeve remember to use a thickness HALF the clearance you are trying to remove. The shim closes the gap on both sides of the axle, so 4 thou gap only needs 2 thou shim.
(Some things you learn by doing!)
If you shim the sleeves let us know how you did it, a shim that thin would be hard to get in there and not wrinkle up.
Brad — not tired this, but perhaps a light dusting of spray adhesive on one side of the shim would hold it tight to the sleeve and enable insertion into the housing without damage.
The Hyatt roller bearings run on the outer surface of the axle, and the inner surface of the sleeve. Both surfaces wear a lot over time, the Hyatt roller less so.
IMO, replace the axle with new, and replace the sleeve with new, and using a fine, tight cage, nice, original Hyatt roller within min. wear spec, and you will have the better results.
If a shim is needed to keep the expanded sleeve from moving, then that housing is well worn out and maybe has other issues too. Would be concerned a shim might keep the locking nub of the sleeve from staying in it's hole in the axle tube, and then that sleeve may spin.... bad news situation.
Dan, I have used shims a few times. I cut them to shape and punch a hole for the locating nub and the grease cup as well.
Put two large jubilee clips on and screw then tight to collapse the sleeve and slide it in little as it goes moving the clips 'out' as needed. The last bit can take a bit jiggling to ease it in the last bit.
I have used shims with no problems. I used steel shim stock not brass. It's been about 15 years so I don't remember how much. The sleeves were new.
Thanks guys...nice to know.
Hope I don't run across a worn out enough axle tube housing to need shims for the Hyatt sleeve
But maybe this axle housing could need shimming in the future, just about the most worn out Hyatt sleeve I have seen ever!
The rollers were likely rubbing on the axle housing inner for a while too
Moral....turn those outer grease cups more often!