Thanks for the info. Working through this I see my chucking light does not go on but goes on when I un-chuck the jaws. seems this arm in the pics below may be the problem. It moved once forward and then back but now is not moving at all. When I command it in MDI and press on one of the switches the chucks starts. Pulled off a line to check for flow and it has hydraulic oil running through it but not very much pressure. any thoughts