Kubota L3130 loader/bh slow hydraulic issue

[Mark Rankin]

Went down to dig a ditch for my neighbor today. No good deed goes unpunished. I had to drive down a steep bank to get to the ditch. He suggested I to drag my backhoe bucket to keep from slipping in the mud. So I was in the number 1 gear creeping down this bank and my backhoe slid in the mud about 4 ft. It dug in about the depth of the teeth on the bucket.

When I got to the bottom nothing worked. My backhoe barley responds to the controls. I had just used the backhoe 5 minutes before going into the ditch.
On top of that my front loader now creeps up and down very slowly. The strange thing about the loader is the bucket functions fine and if I combine the bucket movement with the up or down control it responds normally. With the up and down control on its own it only creeps.

I disconnected the backhoe hoses from the system and the loader still has the same problem.

I think I popped a relief valve somewhere up front when I put back pressure (by dragging my backhoe) on the backhoe with no control valves open. I am going to see if I can resolve the loader problems first. I know they are related but I just need to start some where.

Also in all this one of my backhoe control valves started weeping from the top. The next one to that now drifts backward and is very hard to push forward. I am going to have to put new o rings in those.

I would appreciate any input. Thanks guys.

Mark Rankin
208.267.5637
2/9/2014

 

[Mark Rankin]

I found the problem today. I went down to get my tractor from where I had left it. As I was driving out of the driveway I moved the 3 point hitch lever from fully up to fully down. I felt and heard a bump in the whole tractor. My front loader started working right away. When I got home I reattached the hoses to my backhoe and it worked perfectly. Even the sticking valve popped back into place.

I am still not sure what the bump sound was. It was not a mechanical sound.

I thank God that my tractor works again.

 

[David_Kb7uns]

If you have an early L3130 from 2005 or 2004 and a backhoe there is also an issue where lack of lubrication from extended nose down attitude will result in a sheared hydraulic pump drive and loss or sluggish hydraulics. Read this thread.

http://www.tractorbynet.com/forums/...38-kubota-l3430-glide-shift-transmission.html

David Kb7uns

 

[Mark Rankin]

Thanks David, I read that whole thread. I got sick just hearing about the knot hole that poor guy got pulled through.
I never did see the serial numbers of the tractors with the problem. Mine is a 2007 L3130 SN#52042. It sounded like I would be in the clear.
I would like to make sure though.

 

[David_Kb7uns]

What made me mad was that bulletin came out in December 2004 and I got tractor with backhoe added at dealer in April 2005 and nothing was said about the problem and Kubota would only help on parts upon failure.

My backhoe install disconnects the 3 point hitch loop and has separate return line to tank so I would not have the lever problem and did not even think about it.

Checked bulletin and lists L3130 SN# 10001 to 11405 and SN#30001 to 48611 so looks like you are clear. Post #11 in the thread has the attached bulletin.

David Kb7uns

 

[Mark Rankin]

Thanks for checking that for me David. My BH90 backhoe connects into the 3 point loop so there is no separate return line.
I spoke with the tech at Kubota today and he said I popped the relief valve and was dumping all the fluid back into the tank. I have to see if the one backhoe valve is still weeping from the top. They quoted me 44.90 for the three seal parts which I can change out myself. There is no rebuild kit for the spool in the valve without purchasing the spool as well.

 

[J_J]

Just curious if your BH has work port relief valves.

Is your BH mounted to the frame of use the 3pt?

If your 3pt lever was up, you probably had back pressure through the total hyd system which could blow o-rings, etc.

I believe those o-rings are mainly to keep dirt out of the spools.

Is your BH relief settings the same as the FEL relief valve?