2820D 3-point lift cylinder seal

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Laynes69
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2820D 3-point lift cylinder seal

Postby Laynes69 » Mon Oct 26, 2020 10:15 am

I have strong hydraulics and zero issues with the lift of my bucket or 3-point. However with my 6' brush mower on back, the 3-point jumps every few seconds. I suspect it's bad seals, but I'm not sure where the seal(s) are located and if it's a somewhat simple repair. Also every so often, I will get a whine in the hydraulic pump if the 3 point is empty and the lever is raised all the way. If I lower it a little then the whine stops. Any ideas?

winston
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Location: North East Texas

Re: 2820D 3-point lift cylinder seal

Postby winston » Mon Oct 26, 2020 12:35 pm

The jumping is likely caused by your lift leaking down and control valve raising it back to the set position. Try raising it, then close the stop or slow descend valve, kill the tractor and see if the lift slowly falls. If so, "most" likely would be the lift piston o-ring is bad. https://www.hoyetractor.com/PROD/HPP-4250.htm

The whine is likely your relief valve releasing, your feedback rod may need adjusting.

Laynes69
Volunteer Poster
Posts: 15
Joined: Wed Feb 05, 2020 12:28 pm

Re: 2820D 3-point lift cylinder seal

Postby Laynes69 » Tue Oct 27, 2020 5:20 am

Is it a difficult job to replace the seal? I've replaced the seals on my Oliver and Ford but the yanmar is different.

winston
Volunteer Poster
Posts: 5647
Joined: Mon Feb 01, 2010 7:29 am
Location: North East Texas

Re: 2820D 3-point lift cylinder seal

Postby winston » Tue Oct 27, 2020 5:42 am

I have no drawings or info on the 2820 but see on this sight it is not a regular o-ring. https://www.hoyetractor.com/PROD/HPP-4250.htm

I will attach a thread with a few pictures of my old 2002D. Probably similar to your 2820. https://www.tractorbynet.com/forums/yan ... highlight=


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