Machine is an older Daewoo Puma 200 MSA with a Fanuc 18-T control and I'm using a 16 C collet in the sub spindle to pull the bar and help stabilize it while it's being parted off, ran fine but all of a sudden it quit clamping. It looks like the stroke of the sleeve that opens and closes the collet is so short it's barely moving, I've tried changing the pressure, which didn't help, and the hydraulic oil level is good. Any suggestions before I start taking it apart? Thanks!