Ford 4000 3cyl diesel hydraulic problems

Oneabfarmer · Aug 16, 2017

We have a ford 4000 diesel, standard trans tractor that we cannot get the hydraulics to work correctly. It has a Westendorf loader on it that the spool valve is plumbed into a block mounted on top of the front of the three point cover. The loader would not lift correctly especially when oil got warm. We re-sealed the cylinders, replaced the spool valve, re-sealed the three point piston and replaced the hydraulic pump. Still when the oil warms up we cannot lift a bale on the back and front and the loader will barely lift itself. We did shim the priority valve in the cover just above the hydraulic pump.
Any ideas, or previous experiences would be appreciated.

Thanks,

Shawn

RodinNS · Aug 16, 2017

What you call the priority valve I believe is actually the flow control valve. As long as that spool moves freely and there's no other
obvious damage I think I'd leave that alone. I forget now where it deviates to normally... but I do know they stick sometimes causing the
problem you describe. Logically, based on what I presume is the plumbing arrangement for the loader.. the only problem could be the pump, the
relief or the flow control... unless you are using an ASC valve to divert flow to the loader... in that case there could be a blown o-ring on
the ASC valve.

Rod

Bern · Aug 16, 2017

My money is on blown o-ring(s) on the tube that connects the lift cover to the center housing.

spandit · Aug 18, 2017

My pickup filter was completely blocked which required a split of the tractor to clean it. Seems to work fine now

Ford 4000 3cyl diesel hydraulic problems

Oneabfarmer

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RodinNS

Well-known Member

Bern

Well-known Member

spandit

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