Do not, Do not install, Upper helm lo wer helm – Garmin AUTOPILOT TR-1 User Manual

Page 19

Fig 23

To pump &

Cylinder

To Helm

(Close up view)

Compass

Ball

Shadow Drive

# 4

Red

Black

Brown

Green

The shadow drive valve must be mounted in a

level horizontal position using the cable ties

& mounts with screws included in installation

pack See Fig. 23.

Installation Of Shadow Drive Valve (Dual Helm Station)

Shadow Drive Valve/Sensor: The Shadow Drive is an electronic bi-directional valve. Install it as shown in the system

layout. Install it horizontally, as level as possible. In a dual helm, the shadow drive valve must be located behind and

closest to the lower helm, and closer to the helm than the pump. Avoid any loops in the hydraulic lines, air may get

trapped and cause the autopilot not to work properly. Air can and will get trapped in the valve during installation and

bleeding. It’s very important to get all the air out of the Hydraulic Lines, Helms, Pump, Cylinder(s) and The Shadow Drive

valve.

Do Not

mount the Shadow Drive Valve within 12” of any magnetic interference such as speakers or pump motors.

Do Not Install valve directly to the fi ttings at the back of the helm, it will damage the helm. Be sure to install a length of

hose between the fi tting at the helm and the Shadow Drive valve.

Do Not Install

the Shadow Drive in the return or compensating line.

Do Not

use tefl on tape on hydraulic fi ttings. However, for a leak free hydraulic system, we do advise you to use an

appropriate thread sealant such as, Loctite “Pro Lock” multipurpose anacrobic gel, part number 51604, or equivalent on all

pipe threads.

Electrical Connections:

Connect the red and black wires from the

Shadow Drive Valve to the Brown and Green

wires located at the Compass Ball. See page

8. Use the blue connectors in the accessory

pack to make those connections. See Fig 18-

20 for instructions on blue connectors. (Page

20).The wires can be extended using 18-22

gauge wire.

Pump &

Motor

��

Shadow Drive

Upper Helm

wer Helm

P= Port

R= Return

S= Starboard

HELM

BALANCED CYLINDER

Port Fitting

Starboard Fitting