Hydraulic Drive Systems; Pump To Cylinder Specifications; Reversing Hydraulic Pumps (Type 1, Type 2 & Type 3); Mounting - Raymarine Autohelm 100 Install Manual

Chapter 2: Installation

2.6 Hydraulic Drive Systems

Pump to Cylinder Specifications

Reversing Hydraulic Pumps (Type 1, Type 2 & Type 3)

Mounting

Cabling

This section covers the installation of hydraulic system components
together with relevant plumbing and cabling procedures.
For optimum autopilot performance it is important that the pump specifica-
tions given below match the vessel's steering ram.
Pump
Type 1
Type 2
Type 3
CR1
CR2
The hydraulic pump should be mounted in a horizontal position clear of
spray and possible water immersion. It should also be located as near as
possible to the hydraulic steering cylinder.
Bolt the hydraulic pump to a substantial member to avoid vibration that
could damage the interconnecting pipework.
Using a suitably sized cable (see below) route the pump leads back to the
course computer and connect to the motor terminals.

Type 1 Drive Unit

Cable Length (Drive Unit
to Course Computer)
Up to 3m (10ft)
Up to 5m (16ft)
Up to 7m (23ft)
Up to 10m (32ft)
Up to 16m (52ft)
Capacity
80 to 230cc (4.9 to 14cu in)
160 to 350cc (9.8 to 21cu in)
250 to 460cc (15 to 28cu in)
350 to 500cc (21 to 30cu in)
500 to 1200cc (30 to 73cu in)
Cable Gauge
12 AWG
10 AWG
8 AWG
6 AWG
4 AWG
35
81004-04
Copper Area
2.5 mm
4 mm
6 mm
10 mm
16 mm
81004-05