Kubota L2950 loader bucket won't roll back!

gterbo · Sep 22, 2014

Hello, I have an older kubota L2950 tractor Loader which has lead a hard life in Montana. Recently while pushing rocks and stumps the front bucket roll back function totally quit working. There are no oil leaks or bad hoses, the cylinders are not leaking, and I doubt both could have failed simultaneously, the linkages on the valve body are working. The up and down function of the loader arms works correctly and I can detect a pressure pulse at the hose ends where they connect to the dump cylinders but absolutely will not roll back the bucket. I am wondering if there are multiple relief valves for the different bucket functions, one of which may have failed or if I could have a bad valve body that is showing pressure but not activating cylinder. Anybody have any ideas or knowledge of this system and how to repair?

gwdixon · Sep 22, 2014

Try disconnecting and connecting the quick attach hook-ups. If that makes no difference then switch the dump/curl quick attachments to see if the curl function works and the dump function doesn't (the reverse of what is happening now). Mark the suspect line with a twist tie or the like.

Even further, you can try switching the up and down functions to the curl and dump cylinders. That will at least diagnose where the problem lies. At that point you can address a fix.

gterbo · Sep 23, 2014

Thanks for the reply. Actually, I just recently,within the past couple months, replaced two of the quick couplers at the lower loader arm. I am wondering if perhaps in the brush one of them came partially unhooked.
I should have thought to check this. As often the case we don't check the simple first. I appreciate the tip.