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The pump really does not work any harder,. Well unless you tried to run front and rear simultaneously which is a moot point anyways. I have replaced one pump in 7 years of running this set up. 


However, what you have to be ready to deal with is increased demands for fluid capacity and cooling the fluid. A typical 8 inch PSC reservoir will not hold enough oil to run front and rear steering off one pump without overflowing during heat expansion. So you need to be prepared to create more space for fluid by either modifying a PSC reservoir or another option is to fabricate your own larger reservoir. .I modified an old style PSC reservoir. I attached a photo of  mine which is basically a dual 8 inch reservoir set up that is connected.   Note how short my feed line is to my pump and that the pump feed line is directly over and below the line out of the reservoir. This makes for quick and steady flow to the pump.  Long pump feed lines with angled fittings slows pump feed. Won't necessarily kill the pump, but, it will shorten its life especially as the pump is more modified to flow more.

 Hope this helps you.


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