720 Hydraulic Outlet issue

IAfarmguy · Aug 22, 2016

I have a 720D that is used mostly for light drawbar work, etc. We hooked up a grain drill with a two-way cylinder this morning and it cycled fine a few times. Then the cylinder suddenly acted as if it was plugged with oil (which it isn't) and reluctantly cycled and the pump made a lot of noise while trying to extend/retract. We shut off the engine and let the cylinder float down by gravity, then it would work a couple times and do the same again. The cylinder seemed to work a bit better if we used the lever in the slow raise/lower position. The tractor is set for two-way operation and the oil level was in the middle of safe range. FYI, we switched tractors and had no problem with the g. drill. Any thoughts? Thanks.

Bob · Aug 22, 2016

"the cylinder suddenly acted as if it was plugged with oil (which it isn't)"

Don't even know how to reply to that comment.

My GUESS is as to what cause the problem was the one of the couplers was not fully connected/"open to flow" maybe due to a little wear on each half or something of that nature that made for the coupler to be restrictive.

David from Kansas · Aug 24, 2016

If original, those are pioneer type couplers and are usually pretty reliable. Another possibility is that you have a hose that is deteriorating on the inside and material has come loose plugging your coupler. You could check this out by removing the coupler from the cylinder hose end. WARNING!!! Do not remove the end unless all pressure on the cylinder has been released.

720 Hydraulic Outlet issue

IAfarmguy

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Bob

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David from Kansas

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