Re: Rebuilding 300U Check Valve

Posted by Jimer on July 20, 2006 at 19:49:02 from (198.174.212.96):

In Reply to: Rebuilding 300U Check Valve posted by charleyfarmall on July 19, 2006 at 04:53:12:

You refer to a check valve and I assume that is what I know as the safety block which is the inside, rear unit mounted on the reservoir. I do not think that is your problem, as on my 300u the safety block only regulates the pressure from the pump.
It is my guess your cylinders are leaking or the control valve for the cylinders are leaking. They are not difficult to rebuild except getting the garder spring on in the control valve can be a bugger (that is what kicks the lever back to neutral after activating the cylinder).
I got all the parts I needed, except a couple gaskets which were not hard to make, at a local hydraulic shop. There are a fist full of O rings involved if you go through everything.

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