Re: hydraulics

Posted by mjbrown on May 10, 2007 at 05:57:58 from (132.236.155.53):

In Reply to: Re: hydraulics posted by Jerry/Mt on May 09, 2007 at 20:54:57:

Correct.. and the open center valve is used with
constant diplacement pumps like gear pumps. The
open center/constant displacement system is a loop
with fluid going from reservoir to pump to and through
valve to reservoir. Move the valve and it diverts fluid to
a cylinder to lift something. If no cylinders are
connected and you move the vavle it can stall the motor
because the fluid has no where to go and the C/D
pump must pump fluid.
With variable diplacement pumps with the vavle in
center it is closed and the pump goes to idle not
pumping fluid which reduces load on the engine saving
fuel or allowing reserve power for the plow or whatever.
Hope we have about covered it so it's understandable.

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