I have a MF 230. Attached selector switch block to hydraulic block just under right side of seat.Added and modified a loader to fit and ran all new hoses and fittings and new Cross brand spool valve with 2 spools +aux out. Fired it up and pulled back on spool handles. Cylinders extended. Now to my problem. When I try to retract the cylinders I get nothing. Now my bucket is up and dumped but won’t come down. Tried to bleed all the cylinders but all I get is a fluid shower. Traced the hoses and all appear to be routed correctly. Obviously I no very little about hydraulics. Any help would be appreciated