Thank You Dan. There is no Chain or counter balance that I can see. There is a Hydraulic reservoir, but I am not sure what is hydraulic? Not having any documentation makes this a bigger problem then it should be.

I may have a lube problem. I applied transmission oil to the vertical ways & Ball screw & manually ran the Z axis up & down for about 2 or 3 minutes before the servo alarmed again. I think I will try to blow out the lube lines & then try to fill them.

I have a clamp on ammeter but dont know what wire to check. The servo is rated for 12 amps, but dont see any wires big enough for 12 amps. The 12 amps must be a peak current available for a very short period of time.