I have the ST70 Hydraulic Linear Drive Autopilot. I am having a problem with the unit not disengaging when pressing the "Standby". The only way to get the unit to disengage is to turn off all power to the unit and physically disconnect the ram from the quadrant. Wait for five minutes or so. Then the ram can be moved in and out. Restore the power and reconnect the ram to the quadrant. The next time you want to go to Standby; Repeat the above procedure. In our last 40 hour crossing had to do this 6-7 times.
I spoke to Chris on the phone at Tech Support today. He gave me some suggestions on removing and cleaning the clutch. He also mentioned that there is "An Excellent Tech Service Center in Panama".
Please send me the information on this local service center: Contact name, address, phone number and email.