Kubota L2350 Three Point

[tconnors]

Thank you all.

That was the kind of feedback I was looking for.

We will find a dealer more interested in fixing the problem than fixing their bottom line.

Regards,
Terry Connors

 

[KennyV]

Terry don't forget to post back with the final fix... on this same thread.

 

[banjerpicker]

I have a L2850 which is not much bigger that yours and I have moved some really big hay rolls without a problem, althought I do have to rev up the engine to get the bales as high as I want them before I start to move.

 

[tconnors]

Armed with the knowledge gained here, we went back and talked to one fellow behind the parts desk who over a period of time has proven to be the most helpful fellow in this whole dealership.

He said...simple, get a pressure gauge and measure the output of the pump to the FEL (easiest to do) and if we have at least 2500 psi, then our pump and relief are fine.

If not, his first bet would be to replace the relief valve. He says he does not carry anything to shim it with to change the setting, but a new one is pretty cheap.

We are having a gauge and fitting fabricated now and will check over the weekend.

Terry Connors

 

[tconnors]

Update:
Put together a 5000 PSIG gauge and male hydraulic quick connect. We used the connectors we had made to the bucket tilt and checked the pressure stonewalled against the gauge only (no flow to any device).

We got 1250 psig and up to 1300 with increased RPM.

We checked the other tractor (John Deere) and got 2500 psig up to 2750 with increased RPM.

This clearly is the answer why we are not getting any performance out of the 3 point, loader and remotes.

Now to figure out where the relief valve is located and what it will take to replace it.

Regards,
Terry Connors

 

[KennyV]

Terry , You are on the right track.... half the pressure that is a lot missing.
You should be able to replace the internal parts of the relief valve. KennyV.

 

[tconnors]

Successful Fix!!!

Well, we got the parts for the relief valve as they had to be specially ordered. When we got the exploded diagram there were a couple of washers and several shims of various thicknesses listed that went under the spring to adjust the pressure.

I believe my friend found a specification that 0.1 mm spacer would increase the pressure by 39 psi.

The relief valve in question is located just under the seat on the LHS of the knob to adjust the speed of reaction of the 3 point hitch.

We unscrewed the plug and removed the spring, but the plunger and seat would not come out. We tried snagging it with a wire, needle nose pliers etc. all to no avail.

We then argued ourselves out of replacing those parts as we reasoned that the valve is really a pressure regulating valve and designed to be bypassing fluid most of the time anyway, so washing out of the seat was likely not an issue.

We then started to look for the washers and spacers that should have been under the spring and found there to be NONE.

We followed the exploded diagram, put the washers under the spring first, then did an approximate calculation for the amount of shims we would need, put those in, replaced the spring with a new one even though the new and old spring were identical in length.

Put it back together and tested the system and got around 2250 PSIG to 2300 PSI.

We opened it back up, put in a 0.4 and 0.1 mm shim, reassembled and got 2450 PSI on idle and 2550 psi on increased RPM.

We mounted the 3 point bale spear, went over to the stacks, speared a round bale that we could not lift before, hit the 3 point and lifted it easily and drove away.

Our cost approximately $2.75.

Normangee Kubota estimate for the same fix $800.00

Having this resource to fall back on...priceless!!

Thanks to all who commented and contributed.

Terry Connors