Thinking pump is bad in my 9230, no steering, remotes won't lift, checked filter in hyd tank was clean, spin on filter changed looked like oil in it has some metal particles, have to cut open filter and check yet. also need to check one way check valves in line to pump.any tips on source for pump. does caseih have rebuilt ? have hyd shop rebuild it ? tips on removal, has front steerig so access from below is very limited, looks like remove tires and work from top.