3 pt hitch slow to go up

[Gordon Gould]

If it was mine and I hadn't found something definitive or wrong yet I think I would remove two loader hoses at the block and plug the block ports with male plugs. I would remove the pump output hose which goes to the IN port of the FEL valve and I would remove block inlet hose which should come from the POWER BEYOND port of FEL valve. You can leave the tank hose connected. Then turn the block valve to the NO LOADER position. Start the tractor and try the 3ph. If the problem is gone the trouble is in the loader valve or loader plumbing as mentioned by jimmer. If you still have the problem it is in the 3ph.
If you try this make sure to relieve all pressure before any disconnects are made and have no weight or impliment on the 3ph with the bucket flat on the ground.
You should find these connection locations in your book.

 

[NFPeterA]

Thanks for your replies, guys. Helpful. I won't be back at the tractor until February, and I had little time to work on it last weekend. Mostly focused on replacing aging cooling system hoses and a broken zerk. I'll try to answer some of your questions in the meantime.

The FEL is a Kubota B1630B that was sold installed on the tractor. For the
1st 13-14 years of its life, the tractor was operated by the government liquor commission here in Newfoundland only to clear snow from the loading bays and spread salt on the parking lot (using an electric salt spreader). No 3ph and PTO use. The next three years were in the hands of a retired chap who used it to clear snow from his driveway and that of a neighbour. Again, no 3ph and PTO use. The last owner, before us, used it for light farming with a heavy bottom plow, rototiller, and mower. He put about 34 hours on the tractor, having decided to terminate his experiment with farming (a retirement pastime).

Re. the FEL bucket, when I raise the bucket, and turn off the engine, the bucket dumps in about 5 seconds. This is not a slow leakdown.

That's about all I can say at the moment. I'll have a hard look at it in February. Peter

 

[Arkie Jim]

I'm still getting to know the old (1991) Kubota B6200 HST 4WD tractor we bought in early December. The 3 pt hitch is very slow to go up. The hydraulic fluids were changed about 37 hours ago, with a new filter installed at the same time. Hydraulic fluid level is good. Ran engine at 2500 rpm. What are the possible reasons for the slow lift? What issues should I investigate? Thanks to anyone who posts a reply. Peter

My Satohs has a knob under the seat that adjust the lifting actions of the lift. I can speed it up or slow it down and not have to hold on to the lever.

 

[Gordon Gould]

Thanks for reporting back to us.
When you get back to it I would zero in on the FEL loader valve/pressure relief area. I would consider getting it rebuilt or replaced. Could be a cylinder problem also. Let us know what the final verdict is.

 

[NFPeterA]

Another possible source of the problem is the two transmission fluid strainers built into this machine (see appended photos). It has two of these strainers in addition to a screw-in filter cartridge. "Service Department Vic" from OrangeTractorTalks says these strainers get badly clogged with muck but are rarely serviced. So I will try cleaning them first, and if that doesn't work, I'll try the various suggestions posted to this forum. Thanks again. Peter

 

[Gordon Gould]

Sounds like the smart thing to do. Let us know if that fixes it so we can learn from your experience. I was thinking it would not be in the suction or the pump because that would make your loader slow too. But like I said, I only know enough to be dangerous. Good luck.

 

[2458n]

If the filter you changed was not made of wire mesh and about 6'' long-Vic is correct.This filter was never changed on my tractor and the 3ph acted as you describe. It was like a $15.00 miracle.

 

[NFPeterA]

Regarding the rapid leakdown (i.e. 5 seconds) of the FEL bucket when the engine is turned off, the parts guy at my local Kubota dealership (who has extensive mechanics experience, mostly on JD tractors) says the problem could be leaking seals in the two FEL hydraulic cylinders. What do you think of that theory?

 

[leonz]

Regarding the rapid leakdown (i.e. 5 seconds) of the FEL bucket when the engine is turned off, the parts guy at my local Kubota dealership (who has extensive mechanics experience, mostly on JD tractors) says the problem could be leaking seals in the two FEL hydraulic cylinders. What do you think of that theory?

Its either a or weak/or broken spring or bad spool as the oil flow would keep the spool centered under pump flow and if the spring in the bucket control spool is weak or broken anytime the oil flow stops the spool will react to the weight of the bucket itself and the oil will leak out.