Hydraulic Cylinders Spraying

John Athey · Jul 26, 2021

I have two pieces of equipment with single line hydraulic cylinders and when I raise the equipment, the cylinders spray fluid out. I have a bush hog and a haybine that is doing it. Why? What is the fix? Thanks in advance for the replies. Also it happens on two different tractors when hooked to the equipment.

rustred · Jul 26, 2021

Be nice to know where this leak is your talking about. Either the rod or the gland nut. I would say time for cyl. Overhaul. Plus how can two different cyls do the same thing , if I am reading this correctly. Plus if u only have one hose they are single acting cyls.

David from Kansas · Jul 26, 2021

Any one-way single hose cylinders I have ever used had a vent in one end. If the seal fails on the piston, oil will leak into the void in the cylinder that is normally filled with air, and it will squirt out the vent when the cylinder is in the extended position. Just my past experience.

John Athey · Jul 26, 2021

The fluid spray is coming out the vent hole on both - when I raise the equipment and it gets fully up. Meaning cutter head on the haybine and when I raise the bush hog up to the max height.

Jim.ME · Jul 26, 2021

Repack/overhaul the cylinders, they are leaking internally.

old · Jul 26, 2021

Fluid out the vent is oil says the cylinder needs to be rebuilt or replaced

shaun wallace · Jul 26, 2021

If vents are on top where water gets in they are pitted on inside and not repairable.

Roger in Iowa · Jul 26, 2021

Don't store the machines in the raised position with only the hydraulics holding it up. Use the transport lock to hold up and relieve the pressure on the cylinders.

When hydraulic lines are left at tractor pressure, i.e. 2500 and then sit in the sun, pressures can go as high as 5000 psi. Not good on hoses or cylinder seals.

Your cylinders need new piston seals.

caterpillar guy · Jul 27, 2021

I don't get all this nonsense about double or single acting cylinders and valves. Our JD 1219 mower has a single acting cylinder on it from new we just use the same double acting valve with no problems and have been for over 20 years on several different tractors. As for the oil spewing out the end like already said either reseal or replace cylinder.

mjsnodgrass · Jul 27, 2021

my mower uses a single acting cylinder, with a single o-ring for the piston seal. every time the mower is lifted, and happens to come up against the stop it seems to ruin the o ring, and oil squirts out of the vent. i've changed design of piston seal. time will tell if it works.

LenR · Aug 4, 2021

We had this happen when we added an AC WD-45 tractor, apparently it has higher pressure than our old IH H and blew out a lot of cylinders

Hydraulic Cylinders Spraying

John Athey

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rustred

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David from Kansas

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John Athey

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Jim.ME

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old

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shaun wallace

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Roger in Iowa

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caterpillar guy

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mjsnodgrass

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LenR

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