B5100 Crankshaft spline issue

[Seegeer]

Hey guys,
I picked up two really nice old machines and the one B5100 has an issue with the front crankshaft splines are fairly worn down and the pto shaft which runs the pump for my bucket is smooth. Has anyone done a spline adapter conversion? Any help or guidance is appreciated!
thanks
Spence

 

[D2Cat]

Spence, I think there were two types of splines. One was part of the crankshaft. It was simply an extended shaft with the splines sticking further out. The other was a bold on flange with the splines extended.

Does your machine have bolts holding the extension to the crankshaft? If so, that was available from Kubota as a replacement part.

You might try a search on this site to see what you come up with. It has been discussed a while back.

 

[Black Dog Chainsaw]

If you don't have a bolt on you can send the shaft to a driveline specialty shop and have the splines welded and recut. Same kind of place would do specialty shafts for the big off road trucks and rock crawlers. That may be cost prohibitive if you can find a used one in decent shape.

I've also seen where some places have had a machine shop cut the spline end down to the biggest hex shape possible that would fit a impact socket and then use the impact sockets welded to the other end as the slip yoke. Probably not as heavy duty as the original splines but seems to work in some cases.

Have no idea if any of that is helpful...

 

[barts]

Ancient post, but:

I made an sleeve that's a wring fit over the existing spline, and use a Fenner shrink disk to compress the sleeve over the spline when the small bolts are tightened on the shrink disk. Easy to remove, and the the sleeve drives a chain coupling and thus a small hydraulic pump. Lots cheaper than having a spline cut and has no problems w/ driving the pump.