Re: Dump Truck into a Dump Trailer

Posted by JMS/MN on September 05, 2005 at 19:17:22 from (204.73.106.15):

In Reply to: Re: Dump Truck into a Dump Trailer posted by JMS/MN on September 05, 2005 at 16:42:14:

I checked the plumbing and components and figured out why I did what I did. The St. Paul hoist needs pressure relief valve protection at 1500 lbs. My AC and JD tractors are about double that. I split off the pump, covered the cylinder opening with half inch steel plate, ground smooth, and made a gasket for it. Cut hose threads in the plate- that hose pressurizes the cylinder bolted to it, and has the pressure relief valve in it. The pressure relief valve has an exhaust port to let oil go back to the tractor. That was the interconnecting hose, plumbed into the hyd return line. That return line starts at the cylinder (existing) and has the check valve in it. The check valve keeps high pressure oil from energizing the back side of the cylinder if the two-way valve is moved the wrong way. The check valve must be between the cylinder and the T where the connecting hose screws in- otherwise it will not protect the cylinder from high pressure oil from the pressure relief valve.

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