On 07/10/2018 22:25, Chris Green wrote:
Tim+ wrote:
Chris Green wrote:
newshound wrote:
On 07/10/2018 15:42, Chris Green wrote:
One of the UJT yokes on our Kubota tractor has failed, one of the
'arms' is broken so no longer retains the needle roller bearing.

Is there any sane way of repairing this as replacements seem nearly
impossible to find. It's a bit of a strange design as the yoke goes
direct onto a flanged shaft (i.e. it has an internal spline) so
finding a non-Kubota replacement is unlikely. However if anyone can
recommend suppliers of (small) UJTs with splined connections I'd be
interested.

Possibly cast iron?

Possibly, yes. It certainly looks like a casting of some sort.


When you say broken, do you mean a brittle fracture or something else?

More of a 'worn away until the bearing ripped out', looking at the
remains I think it may not be cast iron as it has torn rather than
cracked.


Photo?

Good idea...... Here you go:-

http:/isbd.net/yoke/p1020500.jpg

Nope. Doesnt work...

Oops, sorry, should be:-

http://isbd.uk/yoke/p1020500.jpg


Thanks, that works for me!

OK so the needle roller bearing has been gone for a long time, that
looks fairly irrecoverable. I'm not really familiar with Kubota
tractors. UJ spares for their mowers look pretty expensive on eBay. This
is obviously on a drive shaft, rather than steering. Less scope to bodge
a drive shaft, I'd have said. If there are really no spares around then
I still think I would be looking to adapt something from another
mini-tractor. You might also look at ATVs.

Looks a bit like this, though

https://www.ebay.co.uk/itm/Kubota-Dr...AOSw4GVYKuK l