Ford 861 Hydraulics

Tim241 · Apr 2, 2017

New member, first post here. Last summer I bought a gently used 1953 Ford 861 from the original owners. It isn't pretty, but with some cleaning and basic tune-up it runs great. I use it with a 60" finish mower to mow my back field. The 3pth worked only once when I opened the bleeder valve and bled it. So this winter I rebuilt the hydraulic pump. I checked the bleeder screw and it seems to be maintaining prime. I did the air in the dipstick trick to be sure. When I did nothing happened at first. But when I took the blow gun off, the arms lifted slowly. Lower them back down and nothing happens.

I've searched the forums her and found lots of info, but nothing specific to my issue. I apologize if this has been discussed somewhere already. If anyone has any advice that would be great!

Thanks

WayneIA · Apr 2, 2017

1953 and 861 don't go together. 1958 was the first 861s were built, but that's not your problem. You state you rebuilt the pump . Did you replace the seal and or drive shaft at the drive end of the pump? When you get some oil to squirt out the bleeder screw plumb a 3/8 hose from the bleeder to the hyd reservoir fill hole and run it till it is free of air.

Kurt-NEPA · Apr 3, 2017

I'm with Wayne. It sounds like your pump is air bound. The hose trick is the way to go. Use a clear hose and you can watch the oil go though it. If you see bubbles, then there is air in pump. Run the tractor until the bubbles stop. Replace the bleeder plug and see it that works. If the bubbles never stop, you have a wobble shaft seal leak.

jerrywv · Apr 3, 2017

I use a piece of clear plastic hose to bleed the pump usually takes a few minutes also the unloading valve could be stuck or sticking and the limited lift heighth could be due a pen on the draft control lever that rides on the rocker this pen can be driven out and reversed or replaced be sure to back up the hand control arm or you could brake or bend it

Tim241 · Apr 3, 2017

I did not replace the seal on the wobble shaft. The bearing was in good shape, and there didn't seem to be excess oil in the cam gear area so I skipped the hard part. That may have been a mistake, but I will try the hose bleeder trick and see what that tells me. Thanks for the info, I will post how I make out once I can get it in out of the snow.

WayneIA · Apr 3, 2017

You won't find hyd oil in the area behind the seal. That seal keeps engine oil away from the hydraulic oil and more importantly, keeps air out of the hydraulic pump.

Ford 861 Hydraulics

Tim241

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WayneIA

Well-known Member

Kurt-NEPA

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jerrywv

New User

Tim241

New User

WayneIA

Well-known Member

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