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I'm not an orange guy but I can fill your head with ideas. Hydraulic systems come in open spool and closed spool. Basically this means that the flow going to the control valve is allowed to flow thru until needed, or is stopped at the valve and only flows when demanded. If you have an open spool system, you can plumb as many valves as you want in series. The pressure line from the tractor goes in on #1 (as it is currently plumbed on your tractor). But the out of #1 valve disconnects from the tractor and connects to the #2 in whose out connects to #3 in and so on. The output of the last valve has to connect back to the tractor's return line that was on the orig valve (that you took off to plumb the out of #1 to the in of #2). If it is the closed type, everything is in parallel. The inlet has to be tee'd to inlets of all valves and ditto for outlets. Hookup of the secondary ckt is identical for all to your implement. I know green used a closed system in the '60's and blue an open. Makes a big difference when you buy and plumb your control valves. Good luck. Mark
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