Raymarine Autohelm 4000, User Manual

INSTALLATION

WHEEL DRIVE UNIT

The wheel drive unit (Fig.2) is attached to

the vessel’s wheel using the clamps
supplied. To complete the installation it is
only necessary to screw the torque

restraint bracket to the pedestal. It has
been designed for permanent mounting

in the cockpit and requires no

maintenance whatsoever.

A single lever disengages drive for

manual steering.

STEERING SYSTEM
The 

 4000 is designed to

operate with steering systems having

between 1 and 3.5 turns lock to lock.

Steerinq systems with more than 3.5 turns
may 

 impaired steering performance

due to reduced rate of rudder application.

Lost motion in the steering system must

not exceed 1% of total movement. This is
equivalent to 7.5 degrees of free wheel

movement for a system with two turns
lock to lock. If lost motion exceeds this
level it must be corrected otherwise
steering performance will be impaired.

It is recommended that the wheel 

is not used on hydraulic steering 

Hydraulic slip across the helm pump
produces significant lost 

 which

will impair steering performance.

Fig.2

I

CLUTCH LEVER

  M O T O R / G E A R B O X

2

ATTACHMENT TO THE WHEEL
The drive unit is clamped to the wheel

spokes using the bolts and clamps

provided, and may be used on wheels

with 

 or 6 spokes (Fig. 3).

Fig.3

A holes   3 and 6 spoke wheels

B holes   5 spoke wheels

The drive unit must be mounted

between the wheel and the pedestal
(Fig. 2).

The attachment kit has three romplete

sets of clamps to compensate for differing

spoke diameters. Marked alongside each
clamp is the spoke diameter to which it

relates. The appropriate clamps are simply
broken off as required.

The spacers (Fig. 5) must be used when

the wheel is dished (Fig. 6) 

 prevent

distortion of the drive unit when the fixing

bolts are tightened.

Fig.5

SPACER

For 4 spoke wheels, use a 

 drill to open 

 C 

to gain access to the additional mounting
points (Fig. 4). The plastic membrane
covering the additional nut inserts is only

1 .Omm 

 thick, and care must be

 to 

 that the nut inserts 

 drilling 

o

f

 is 

 your