1086 supercharge line

Is it OK to cap where the supercharge line goes into the MCV, and dump the line that feeds it from the work remotes back to the rear case to do some troubleshooting? I'm still having some problems with our 1086 stopping when steering is turned to stops below about 1100 rpm. I just resealed the MCV, new orings, gaskets, new MCV pump. Installed new load control shaft bushings and seals. New Orings on the rear pump suction tube in the filter housing, and new oring on the big steel suction line from filter housing into rear end housing. New hyd filter, all new HyTran and 5 gal overfilled. Tractor has a diffential lock (disabled). Also put all new orings in the remote valve stacks. Checked pressures in all 3 positions, DD, halfway, TA, and with only brakes applied, only steering to stops, and steering to stops and brakes applied. All pressures are good until steering is introduced in any of the tests. MCV pressure is 260, lube is 20. In middle position MCV pressure is 245, lube stays pretty much at 20. But, turn the steering to stops, the MCV pressure flickers between 245-260, and the lube pressure falls to zero. Brakes work very well, steering is not sluggish at all. To hold steering at stops for any length of time requires a small bit of turning the steering wheel into the relief, or it will let off pressure if steady pressure isn't kept on turning the wheel. I saw where there is supercharge elimination kits to reduce suction leaks, and I thought I'd just roughly try it to see if it helps anything. I have the lift arms off the 3 point and didn't plan on putting them back on as we don't use the 3 point, but I have the 3 point raise lever all the way up, that wouldn't be messing with it would it? If the hitch pump was worn out, would it cause issues like I'm having (it lifts implements just like it should)?
Thanks a lot!

Ross

You can plug super charge line and route the flow from where you disconnect that line right into the same spot aux valves return when they are being used. All you gauge reading suggest high pressure oil loss in steering circuit. Pump, or high pressure circuit in MCV. I have seen a 806 and 856 that would blow the high pressure o ring between the plates. Some blow the o ring down in the corner where mcv bolts to housing. Those o rings are supposed to be a much harder o ring than the rest of them in a mcv. You could possibly have a leak in the casting where high pressure is exposed. You could run a flow test under pressure on the mcv pump but I think I probably did that once in my life and relied on the other gauges to lead me to the problem.

Thank you Pete, your expertise and input is always appreciated by me.

Thanks again

Ross