The Raymarine Type 1 Pump 12V is a reversing hydraulic pump for use with steering systems equipped with 4.914 cubic inch (80cc 230cc) hydraulic steering rams.

The Type 1 hydraulic drive is compatible with both S1/S1G and S2/S2G corepacks. Use the table below to determine the Type 1 hydraulic drive’s capacity when used with each corepack

Corepack Used S1 or S1G

Ram Capacity 4.9in – 10.5in (80CC-172CC)
Maximum Stall
Pressure at 12V 750psi (50bar)
Peak Flow Rate
(no load) 67in/min (1000cc/min)

Corepack Used S2 or S2G

Ram Capacity 4.9in – 14in (80cc – 230cc)
Maximum Stall
Pressure at 12V 750psi (50bar)

Peak Flow Rate
(no load) 67in/min (1000CC/min)