Backhoe new 4672 A backhoe problem

boustany · Oct 21, 2003

I'm sure the Kubota dealer thinks it a feature, but the relief valve protects the boom from being damaged while using the hoe. At least thats the way it should work - there is no way the boom hydraulics can damage the hoe. In reverse (i.e. backing into a solid object) the boom would tuck in and you'd have to bend a lot of metal to damage it. Pin or no pin, if you could damage it, you would.

The transport pins and lock are supposed to be a safety feature, not a shear pin. My link was damaged all to easily, and the pin came out a year and a half later for no particular reason. I can't imagine what would happen if the tractor was being transported and the pin popped out. It could be catastrophic.

In my machine as the pin pulled out it bent the base of hoe a bit. If it had been reinforced properly that shouldn't of happened.

I had a Case backhoe with a honking 1" transport pin. It was not a shear pin. It didn't have a link, but the clasp for it was shaped so it would sort of play if you backed into something. If I can figure out how to do it, I'll modify my link with an oval hole or something to have the same effect.

wstacy · Oct 29, 2003

My pin is in and it will be covered under warranty. However, my dealer doesn't have a mobile welder so I have to take it in. Will try to remember to get the part number. I think the fix will be to weld a little extra reinforcement plate like was done on the aft pin. I don't think it should be a "shear" pin, and Kubota seems to agree. Now I get to figure out how to tie that boom securely on the trailer... I got to Kubota by e-mailing their web site. Gotta love the internet... /forums/images/graemlins/smirk.gif

GregJ · Oct 29, 2003

I'm glad to hear about your fix and that it is covered by warranty. The more I got to thinking about the "shear pin" theory, the less I agreed with it. Keep us posted about the fix. If you could attach a pic, I'd like to see what the finished product looks like.

Thanks,
Greg