Need more info - like what the backhoe is and what type of control valve is on it. I'll assume your pump is a 1.4 cubic-inch-per-revolution? You can't go much bigger since it takes 29 horse to pump 14 GPM at 2500 PSI. That's kind of small for a backhoe but maybe the hoe is small and you can rev up the engine for better speed? Backhoe pumps are usually near twice that size.
Backhoe valve will usually have the relief valve built into it. So, no extra plumbing needed. Your's doesn't? If not, and you're sure it's an open-center valve - maybe it has a port where you can screw one in? If not, you can add one in the line somewhere. That would require an extra return line. Seems odd though if you've got an o
My Ford 4000 which is basically the same size as a 900 has a 2.6 cubic-inch-per-rev pump in front - for use with a hoe and loader. That flows 18 GPM @ 1800 RPM and 27 GPM @ 2500 RPM. My Ford 641 with loader has a front-mounted 1.4 cubic-inch-per-rev pump.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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