tea 20 hydraulics

dragrace390 · Sep 20, 2020

I removed the pump from my tractor last night to replace the relief valve. I drained a couple of quarts of water and the oil was severely contaminated. My question is would it be best to go on and "freshen up" the pump while it is out and to what extent? If so, are the rebuild kits universal for one with or without the oscillating control valve? Mine looks to be a 1952 model based on casting numbers and has the later valve and brace in the control arm fork. The previous owned used the tractor to drag pine trees around so I'm certain the pump has been over worked a bit. I also removed the top cover to aid in the removal of an excess of silicone and cleaning of hydraulic bay so would it be advised to rebuild the cylinder also? This has probably been addressed in a previous thread so I apologize for any repeat questions. Thanks for any answers on this matter.

John Deere D · Sep 20, 2020

Good morning dragrace390
I'm interested in knowing what prompted you to replace the Relief Valve?

Did you by chance install a gauge and verify the operating discharge pressure of the pump pressure?

Each owner to their own.

If the Test gauge indicates good discharge pressure, no jerkiness lifting of arms, and no excessive dropping / lowering of three point arms, I would not tinker with the pump.

Bob..Owner of Ferguson TEA-20

dragrace390 · Sep 20, 2020

Mr. Bob, thanks for the response. I'm replacing the relief valve because the lift would not lift unless the engine was at high RPM and It would also sink as soon as the clutch was depressed. I removed he side cover with the PTO engaged and could see fluid flowing back up from where the relief valve is so I'm taking it for granted that with no other leaks being seen that the relief is bad. The top cover got removed for the sole purpose of cleaning up all of the silicone that was used; it was severely in excess.

Charles in Aus. · Sep 20, 2020

Rather than the pump I suspect that the lift cylinder may be worn .
A 1952 tractor could have either gasket or o ring seals in the pump , both should come in the rebuild kit . A worn or scored cylinder wall or rings need to be addressed before the lift will hold pressure . Dont forget to inspect the lift pipe o ring seals as well .

tea 20 hydraulics

dragrace390

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John Deere D

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dragrace390

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Charles in Aus.

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