JCB 8032 Slew and other problems

It seems that one of the pump stages has a problem putting out only 45 bar. This affects the dozer, slew, swing and dipper boost. interestingly the slew will work slowly on higher rpm and accelerate when I engage the boom-up service just enough that the boom is not really moving fast. This confuses me as I don't see any connection between the two. The slew is also
drifting when when the machine is not completely level.
Additionally none of my 3 M.R.V. are adjustable. No matter what...

JCB 8032 Slew and other problems

JCB 8032 Slew and other problems