Harrop 2300 supercharger to Optimiser 6500

[PeeBee]

Another day of bee-stinging enlightenment. Hydraulics this time.

I am running the same 12V DCV front and rear. I deliberately swapped the front dcv so I had parts commonality and flowrate the same.

So I plumbed the front and rear up to the nameplate on top of the valves. On firing up the system, the 'at idle' system pressure for the front was 200psi and the rear 2000psi, and going over the pressure relief valve. Initially thought I had a check valve on the return line back to front, nope all good. Then I thought I had a stuck spool.

Made contact with the winchmax agent and he sent me out a replacement valve. The dcv to mount block can only be configured one way as the mounting holes are offset. So, after struggling in the half dark trying to swap the dcv over, without effect as the mount holes would not line up - see 'offset holes above'. So, I turned the valve around to line up the holes, only to find the PT and AB ports are now opposite to whats on the tin plate, so when I select this flow to the winch it pushes oil into a dead end and relieves over the pressure relief, and also explains why the winch is rotating opposite direction to the hand controller and more importantly why the pressure drops to circa 300psi once a forward or rev direction is selected.
The dcv to baseplate have never been seperated on either valve until now, so seems like a simple arse backwards fixed nameplate was the problem all along.

Further to this, the replacement dcv valve body thickness is machined differently and so the screws are now 4mm too long, they bottom out before clamping down the dcv to the valve block - m4 x /// or similar - Fuck me this is getting tiring. Anyway, I now have a bigger job to do with swapping the hoses around - it was a bastard to build with the body off, far worse now having to work in a shoebox size cavity. NOT happy.