Weld and recut or replace

[Batmanacw]

This is a shaft from the transmission of a John Deere tractor. It is discontinued so finding a replacement has been near impossible. I can weld it up or make a new one.

Welding is problematic from a heat treat standpoint. What material should be used for toughness but still be able to machine?

Making a new one is problematic from a straightness standpoint. I'm worried about sending it out for heat treat and having it come back not straight. What material should I use?

 

[tjb]

Picture?

 

[tjb]

And what model tractor?

 

[Batmanacw]

Picture?

Oops.

 

[Batmanacw]

And what model tractor?

No idea. I'll have to ask.

John Deere 2440.

 

[markba633csi]

I was going to suggest welding up the spline area and recutting the splines
Then perhaps do a little straightening if required with a press

 

[Batmanacw]

I was going to suggest welding up the spline area and recutting the splines
Then perhaps do a little straightening if required with a press

This engages the clutch plate. Do you think a weld cam handle the pressure? What type of weld material?

 

[Sticks]

Could always just cut a new shaft

 

[OTmachine]

I worked for Durst, a division of Regal Beloit, making John Deere transmission gears and shafts for a little while. Most all of our gears and shafts were made from 8620 steel. HTH.
And I have made a couple of Wabco motor grader hydraulic drive shafts out of 4140 Rc40 which did not run on needle bearings, ( had to make it 2 times because dummy ranch hands did not want to wait for hydraulic oil to warm up in -10 degree F Colorado weather).

 

[FOMOGO]

Might give this a look. Mike https://appliedmaintenance.com/spline-shaft-repair.html