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zetor tractor hydraulic pumps

A

Anonymous-0

Well-known Member

I have a 1999 Zetor 4320 with a Zetor loader.
WE are having trouble with the loader ?
Are there more than one hydraulic pumps on that tractor. Is there a main and then one for
loader that is mounted up near the engine block?
 

Don't have that model, but The vintage i have came with the pump in the bottom of the transmission. It was replaced with a pump that runs off the front of the crankshaft which gives better tractor hydraulics and better loader hydraulics. I was told that with the original regular tractor hydraulics it was necessary to take the pto out of gear and let the clutch out to run the hydraulics while dumping a bale out of the round baler. If yours is not working at times, perhaps there is a problem with that system.

Another source of problems with loaders in general is to have a clogged hydrailic oil filter. The tractor I have, a 7711, has a big filter plumbed in outside the transmission case. For one that uses the original tractor hydraulics, I don't know where the filter is but manual should tell you. My tractor with the external pump still uses the transmission case as an oil resevoir, uses 80-90 gear oil.

There is also power steering pump but it and it's oil supply are separate from the rest of the hydraulics.

KEH
 
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