[CA] [CA11] Which Evo for Simrad RPU300 hydraulic pump

[Timmacdonald]

I currently have a Simrad autopilot that I’d like to upgrade to Raymarine but keep the existing pump. I can’t determine from the charts whether I need an ACu-300 or 400. The RPU300 stats are:

Hydraulic Ram Capacity: 17.7-58.5cu.in. (290-960cc)
Maximum Pressure: 60 BAR
Dimensions: 9 1/16"L x 3 15/16"W x 4 13/16"H
Amperage: 3.5-10A @ 24V

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Tim,

While it is possible that the ACU-400 may be used with the specified third party drive unit, I will need to know the capacity of the vessel's steering ram in order to properly advise.

[Timmacdonald]

Hi,

The steering arm is a Macron MC 80x9 which appears to have 21.15 Cu in displacement. Is that the spec you need? I've attached the spec sheet.

Thanks!
Tim

[Chuck - Raymarine - Moderator]

Tim,

Given the capacity of the steering ram an ACU-400 would be required for the Evolution autopilot system.