I had to change the input shaft in my Eaton 11 transmission because it was bent.
I got a new used shaft from Bob’s Lawn and Garden Tractors.
I have had some serious problems in getting the coupling off the input shaft. I drilled out the grub screws, sprayed with penetration oil (WD40), left it for a couple of days, tried to heat it a little but the coupling would not come off.
So I decided to cut the shaft.
Once the coupling was off I could knock the shaft end out with a hammer in my vice. As you can see there come out to pieces of shaft. Don’t know why this was so.
The hole in the coupling was very worn and not round at all.
So I took the coupling to my lathe and bored it up to 25 mm.
Then I pressed a 25 mm shaft into the coupling.
I welded through the holes where the grub screws have been sitting down into the shaft.
I also welded it on the outside.
Then I took it to my lathe and bored a ¾ inch hole where the shaft fits in.
I also drilled holes and threads for two new grub screws.
The next thing to do was to get the old input shaft out of the transmission, so I had to take the transmission apart.
Here is the transmission taken apart.
So… and now I got a new problem.
As you can see on the pictures the two grooves are not located on the same place. The shaft Bob send me must be for a primer pump with ball bearings and my primer pump is with bushings.
So what can I do about that?
I have been thinking of:
1: Make two new grooves at the right location and fill the other grooves with plastic metal in the shaft from Bob. The oil sealing ring is exactly where the one groove is. If I fill it with plastic metal will it hold? What do you think?
2: Take the old shaft and weld a new shaft to the end and then throw the shaft from Bob away.
3: Buy the rest of the primer pump from Bob.
Edited by Per, July 14, 2013 - 04:10 PM.