[CA] [CA11] Autopilot Hydraulic Drive Bleeding

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Chris,

Mechanical linear drives, hydraulic linear drives, and tiller drives (those which are driven by a separate autopilot course computer or ACU) feature a clutch which is responsible for engaging and disengaging the drive unit. Accordingly, the drive unit's clutch leads must be connected to the autopilot course computer or ACU. When placed into Auto or Track mode, 12V is applied to the clutch leads by the course computer or ACU. When place in Standby mode, this voltage should drop to zero. Should a multimeter be connected to the clutch terminals of the autopilot course computer or ACU and these voltages be observed, then it would appear that there is a fault within the drive unit, necessitating that it be returned to Raymarine’s Product Repair Center to be bench checked / serviced. Should these voltages not be observed, then it would indicate that that autopilot course computer or ACU has suffered a failure and should be sent to Raymarine’s Product Repair Center to be bench checked / serviced. (applies to SPX or later autopilot course computers and Evolution ACUs).