[TG11] Use Type 3 Hydraulic Pump With a 255 cm3 Cylinder

[Tom - Raymarine - Moderator]

Hello Horacio,

It is important that you match the pump to the capacity of the steering system. If you use a Type3 pump with a 255cc steering cylinder then the steering will be too fast (the pump will pump fluid too quickly) and the pilot will probably continually active, 'hunting' trying to settle on the correct rudder position and always over-shooting. The results will be at least some of the following:
- excessive current consumption
- early wear of the pump
- poor steering performance
- uncomfortable rocking motion as the pilot continually makes small left-right rudder movements

I would recommend selling the T3 pump and buying a T2 instead. You can use the T2 with the ACU400 and the rest of the pilot system of course.

Regards,
Tom