Hydraulic Dilema .... '50 Super A

Posted by TonyG on November 01, 2003 at 07:23:47 from (66.44.106.253):

Hey Guys, I need help on this Touch Control unit.
First a bit of background; '50 Super A, Touch Control Unit(TCU) had three problems - leaking (at strainer plate), "hunting" for position, and When moving an implement (pulling either lever towards the rear) the engine would labor, even when nothing at all was connected to the TCU!
So I figured, rebuild the TCU, as it looked to have never been done before. I replaced all the gaskets, O-rings, plastic valves&springs, cleaned the entire unit (actually became a restoration project for the unit) down to bare metal, and reassembled with great care and cleanliness.
After remounting the unit, the leak was gone, the hunting stopped BUT the unit still labors the engine when moving the levers to the rear! It lifts just fine, and puts plenty of down pressure, but really works the engine just to move those arms to the rear! (by the way, the arms move freely when disconnected from the TCU rods, so their not grinding or stuck).
I don't think it’s the pump, or it would act the same going in either direction. I didn't replace the small orifice (looks like a carb jet with a strainer attached) that’s in the TCU, but I did clean it, and it didn't look damaged or anything, could it be worn? The tractor only developed this problem in the last year, and has gotten worse over time, but only a little.
Any ideas here ? I'm at a loss as to where to look next......
Thanks a bunch for any help
T.

Follow Ups:

• Re: Hydraulic Dilema .... '50 Super A Hugh MacKay 03:59:56 11/02/03 (0)
• Re: Hydraulic Dilema .... '50 Super A Brian 16:08:24 11/01/03 (1)
  • Re: Re: Hydraulic Dilema .... '50 Super A TonyG 07:32:21 11/02/03 (0)

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