I got some great info a couple of years ago on rebuilding the clutch pack in my 653 Dozer.  Plates were shot and fingers were all out of adjustment. Rebuilt the clutch, adjusted fingers, adjusted throwout bearing placement to spec.  While operating, dozer is still not releasing clutch on that side when pedal is depressed.  Works ok at startup, but once its warm it wont release.  Im wondering if the pedal steering valve or the cylinder has an internal leak and cant maintain proper pressure when depressed.  Anyone have any idea how to test this or what the proper pressure would be? Shop manual doesnt cover much of the pedal steer system.

Thanks!