Farmall560 Hydraulics

David Kinnison · Mar 3, 2009

Area above hydraulic pumps is overheating, will boil fuel spilled on the case, any ideas?

bc · Mar 3, 2009

My best guess is that the, or one of the, relief/bypass/safety valves is plugged somewhere keeping everything under constant high pressure. Overheating pumps will burn out the seals. This is assuming you have working hydraulics and the pumps aren't running dry.

Check out the hydraulics diagram in your book or the caseih.com website to find the relief valves. Plugged with sludge or something. Remove the valve and then crank it over to see if fluid is flowing. It may have one on a block by the draft control housing and one under the seat and plate in the draft control housing.

Let us know what you find out.

scott mcintosh · Mar 3, 2009

check for plugged orfice and screen in safety valve block,part #10 in IT book,there is one for power steering pump but that requires removal of pump,most likely the one in valve block,if you need more answers post.Scott

Owen Aaland · Mar 4, 2009

Like Scott says.

The 560 uses a closed center hydraulic system with a constant displacement pump. There is an unloader valve that has to move to dump oil to the reservoir when there is no demand for hydraulics. The unloader valve also functions as the system relief valve. The flow of oil through the orifice is what controls the unloader valve. If it gets plugged or the screen so dirty that it does not allow enough oil through the system will stay on high pressure. Excessive wear in the auxiliary valve spool and body can also keep the system on high pressure. Check the orifice first.

Farmall560 Hydraulics

David Kinnison

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bc

Well-known Member

scott mcintosh

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Owen Aaland

Well-known Member

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