18
Mechanical steering systems
If you are fitting the pump to a boat with mechanical steering you will need to connect it to a
secondary steering ram, along with a solenoid-operated bypass valve. This bypass valve
allows you to switch between autopilot course control and manual steering.
To fit to a mechanical steering system:
• Use suitable hydraulic pipes to connect the pump to the secondary steering ram and a
suitable reservoir.
• Install the solenoid-operated bypass valve (part number: M81167) across these pipes (as
shown in
Figure 10
).
• Connect the bypass valve to the
CLUTCH
terminals on the course computer or ACU using
at least 1.5 mm
2
(16 AWG) copper cable.
Note:
Follow the manufacturer’s instructions for mounting the hydraulic ram and reservoir.
Figure 10
Type 2 drive 24 V
up to 3 m (10 ft)
up to 5 m (16 ft)
up to 10 m (32 ft)
up to 16 m (52 ft)
12
10
8
6
4
6
10
16
Type 3 drive 12 V
up to 5 m (16 ft)
up to 7 m (23 ft)
up to 16 m (52 ft)
8
6
4
10
16
25
Type 3 drive 24 V
up to 5 m (16 ft)
up to 7 m (23 ft)
up to 16 m (52 ft)
10
8
6
6
10
16
Table 1-3: Recommended cable sizes (Continued)
Cable length
(pump to course computer or ACU)
Cable gauge
(AWG)
Copper area
(mm
2
)
D5172-3
Bypass valve
Secondary steering ram
Manual steering system
Autopilot pump
connect to
CLUTCH
on course computer or ACU
connect to
MOTOR
on course computer or ACU
81178_5.book Page 18 Wednesday, April 24, 2013 6:42 PM
Summary of Contents for E12139
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