Rust on Mainshaft--What to do?
12-12-2011, 09:23 PM
#1
TECH Apprentice
Thread Starter
iTrader: (16)
Join Date: Jan 2011
Location: Central Ohio
Posts: 349
Likes: 0
Received 0 Likes
on
0 Posts
Rust on Mainshaft--What to do? Hey Guys,
I am rebuilding my t56 and disassembled the mainshaft tonight to discover some rust on the mainshaft underneath the large tapered bearing that sits above first gear. There are two spots, one larger and one smaller, and there is a ring of rust stain encircling that area of the shaft. The pics below are first of the rusty spots on the mainshaft (first pic is of the entire area, second is a close up of the larger spot), and the third is of the inside of the large tapered bearing. My question is, is this bad enough to have to replace the entire mainshaft and the bearing? Or, can I get away with sanding down the area on the mainshaft and polishing it up? Any help is appreciated. Thanks!
Scott
I am rebuilding my t56 and disassembled the mainshaft tonight to discover some rust on the mainshaft underneath the large tapered bearing that sits above first gear. There are two spots, one larger and one smaller, and there is a ring of rust stain encircling that area of the shaft. The pics below are first of the rusty spots on the mainshaft (first pic is of the entire area, second is a close up of the larger spot), and the third is of the inside of the large tapered bearing. My question is, is this bad enough to have to replace the entire mainshaft and the bearing? Or, can I get away with sanding down the area on the mainshaft and polishing it up? Any help is appreciated. Thanks!
Scott
12-13-2011, 06:17 AM
#2
Hey Guys,
I am rebuilding my t56 and disassembled the mainshaft tonight to discover some rust on the mainshaft underneath the large tapered bearing that sits above first gear. There are two spots, one larger and one smaller, and there is a ring of rust stain encircling that area of the shaft. The pics below are first of the rusty spots on the mainshaft (first pic is of the entire area, second is a close up of the larger spot), and the third is of the inside of the large tapered bearing. My question is, is this bad enough to have to replace the entire mainshaft and the bearing? Or, can I get away with sanding down the area on the mainshaft and polishing it up? Any help is appreciated. Thanks!
Scott
I am rebuilding my t56 and disassembled the mainshaft tonight to discover some rust on the mainshaft underneath the large tapered bearing that sits above first gear. There are two spots, one larger and one smaller, and there is a ring of rust stain encircling that area of the shaft. The pics below are first of the rusty spots on the mainshaft (first pic is of the entire area, second is a close up of the larger spot), and the third is of the inside of the large tapered bearing. My question is, is this bad enough to have to replace the entire mainshaft and the bearing? Or, can I get away with sanding down the area on the mainshaft and polishing it up? Any help is appreciated. Thanks!
Scott
12-13-2011, 12:29 PM
#3
TECH Apprentice
Thread Starter
iTrader: (16)
Join Date: Jan 2011
Location: Central Ohio
Posts: 349
Likes: 0
Received 0 Likes
on
0 Posts
Ok, thanks Mike. How about the bearing? Is the inside surface ok enough to reuse?
Anyone else have any input on this? Is this a common problem? It looks like moisture got in there somehow, but this I'm not sure how. Are there any other things to watch for now I know moisture got in the case?
Anyone else have any input on this? Is this a common problem? It looks like moisture got in there somehow, but this I'm not sure how. Are there any other things to watch for now I know moisture got in the case?
12-15-2011, 11:56 AM
#5
TECH Fanatic
iTrader: (6)
Join Date: Oct 2002
Location: Charlotte metro area
Posts: 1,959
Likes: 0
Received 3 Likes
on
3 Posts
This is not rust as you may get with water. It is fretting & is caused by torque loading of the journal. As long as you still have a snug press/ fit of the joint, it will be fine. If the joint is loose, get a new gear first , then a new sgaft to correct the fit. This joint needs to be tight.
