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Discussion Forum

Re: WD hydraulics

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03-10-2002 04:37:49

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Randy, The hydraulic system on the WD is high pressure - low volume. This makes the system incompatible for some applications, but it will work - only very slowly. You will have to add a spool valve; the location selected is your choice for ease of operation. Route a pressure line from the tractor hydraulic pump (you can tee into a line going to the lift cylinders) to the input side of the spool valve, and route the return line from the spool valve back to where you check and add hydraulic fluid. Just below the cap you will see a pipe plug that can be removed and this is where you connect the return line. Use the largest diameter hose possible going from the pump to the spool valve to provide for maximum oil flow. I used this system for a loader with double acting cylinders on a WD45 25 years ago. The performance was extremely slow and unacceptable when loading lime in a spreader. But maybe for operating only one cylinder it may meet your needs.
If your needs require a responsive system that reacts quickly, you will have to add a pump. I initially added a pump kit to the distributor drive, but the drive gear would not handle the stress and load from the add-on pump. Eventually, I connected a 10 gpm to the crankshaft and this solved all the problems. Adapting the pump to the crank was challenging, but a little fabrication here and there and it was on and working! The results are very satisfying and I still use this tractor today. If you add a pump, you may have enough volume in the tractor hydraulic system reservoir. If not, you will have to add a tank. Best wishes!

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Bryan Smith

03-11-2002 11:30:05

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 Re: Re: WD hydraulics in reply to Tom, 03-10-2002 04:37:49  
YT has a conversion kit for a D series AC that reportedly includes a pressure reducing valve to get it down to 2200 psi. The kit costs around $230 - you could probably start with this and adapt it to your WD.

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