Hydraulic Help

Ohio_Bill · February 25, 2014, 04:23:03 PM

I have a Gearmatic Model 21 winch . Gearmatic made these for Massey Ferguson, not many of them around and parts are not available. It has a low volume hydraulic pump 900 psi that engages the clutch and releases the break . The pump is getting warn out and I have to weight for to build up pressure for it to work .
Would it be possible to some how drop the pressure of the skidders hydraulic system to 900 psi for a feed to the winch without affecting the main hydraulic system? If I could do this , the old pump in the winch could be eliminated .

Thanks for your help

treeslayer2003 · February 25, 2014, 05:17:21 PM

pressure regulator? the clarks have one to limit trans pressure but it is the entire trans system. couldn't you get any pump that would fit and regulate it that way?

Ohio_Bill · February 25, 2014, 09:20:46 PM

After doing some reading I think a pressure reducing valve is what is needed . The main system is 1700 psi open . The pressure reducing valve would go in series with the winch line and drop that line to 900 psi .. Does that sound ok ?

In contrast to pressure relief valves, which affect the level of input pressure (i.e. pump pressure) fed into the hydraulic system, pressure reducing valves are used to influence the output pressure of the hydraulic system to a subsystem (e.g. actuator pressure).

Reducing the input pressure (primary pressure) or maintaining a particular output pressure (secondary pressure) is achieved at a set value which is below the varying pressure occurring in the main hydraulic circuit. It is thus possible to reduce the pressure in one part of the circuit to a lower level than the system pressure.