We are facing problem in 120H grader, steering is fine, but the implements are slow, the pump is not upstroking unlessthe steering is operated. We cleaned the combination valve & changed the signal purge valve. But still the problem exists.
some questions if you operate the functions one at a time is there one or more functions that are OK? did you clean, check and reseal the resolver valve in the combination valve for the steering/implement signal ? have you checked low pressure standby and margin pressure? Mark