| Re: [GMCnet] rear axle - bearing clearance [message #260372] |
Thu, 28 August 2014 16:55  |
Tom Whitton
Messages: 235
Registered: February 2004
Location: Paducah, KY
Karma:
|
Senior Member |
|
|
The left rear rear drum would not go for me so I called my friend Bob Stone, who is certainly a better mechanic than me. He came to my garage and had the same problem. We found the problem to be the bearing and axle clearance or lack thereof. The bearing ID using calipers is 1.614. The axle OD measures 1.628. According to this measurement, the axle is .014 larger than the bearing ID. I don't own micrometers but plan to borrow some to get accurate measurements. Regardless of accuracy, the axle is obviously too large for the bearing. Don't ask me how mechanics that I have hired to work on the brakes got the hub installed. I would say with great difficulty. It was a total bi--- to remove the hub!
Can anyone tell me what an acceptable tolerance axle-bearing should be? From what I found searching the internet, the axle should not be more than .002 smaller than the bearing ID. My axle is larger than the bearing. I don't know if .002 is a universal tolerance or if the tolerance should be different with a GMC motorhome. When I learn what the axle size should be I can remove the axle and take it to a machine shop to be accurately turned to the correct size. If anyone has better ideas, I will appreciate hearing them.
One last thing, I tried to put the left center hub on the rear rear and it would not go on either. It looks to me like the axle on my coach is very definitely oversize. Why I can not answer.
Looking forward to your answers,
Tom Whitton
Paducah, KY
26 foot updated GMC
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
