These two connections are from your auxillary pump and have absolutely nothing to do with the hyd quadrant. The aux pump is constant running and constant power, but not very big in output. You can run a spool valve from the power/outlet side of this looped pipe, but you must discard the pipe and put the return flow from the spools into the other inlet, thus completing the circuit again. These spools are adequate for running light duty rams like lifting trailed disc wheels or turning over a reversible plough. To get good power and speed from a loader you need to combine BOTH pumps. to do this you need a high flow rate spool valve and an isolator valve on the lift cover, where your spools are now. You plumb a hose with a non return valve from this isolator and a hose with a non return valve fom the outlet on the PTO selector plate, into a 'T' piece on the input side of your spool valve...one large hose will suffice from the spool valve to the return port on the PTO plate. In normal operation your spools will be live when the tractor is running and will not affect the quadrant operation, but if you need hyd power for heavy lifting you switch over your isolator valve, thus locking the 3 point and put your quadrant position lever to 'Constant pumping' with the draft lever to fully raised position. You now will have real good power and flow for your loader. This might sound like a lot of work...but you will be glad afterwards! The picture shows just how small the aux pump is. Sam
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