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Fig.6

DISHED WHEEL

METAL WHEELS

To attach the drive unit to the wheel:

Place the drive unit with the clamping

face uppermost i.e. drive motor and

gearbox tube downwards.

 Position one spacer at each of the

three attachment positions (if the
wheel is dished).

 Remove 

 and place it on top

of the drive unit making sure the face
which is nearest the pedestal is
downwards.

Place the clamps over the spokes and

lightly tighten the bolts supplied
(Fig. 7).

Fig.7

FIXING BOLT

S P O K E

CLAMP

DRIVE UNIT

SPACER (IF REQUIRED)

WOODEN WHEELS

A separate attachment kit is available
from your 

 

 for use with

wooden wheels (Catalogue number

MOUNTING THE PEDESTAL BRACKET

The pedestal bracket pin should be cut to

length to suit the pedestal as follows:

Replace the wheel and measure the

distance between the backplatc of 
drive unit and the pedestal (dimension

Fig. 8).   the wheel is slightly bent,

Fig.8

3

the distance will change with the
wheel position. The smallest distance
should! be 

 The mounting

pin should be cut 11 mm 

 dimension 

(Fig. 9).

Fig.9

   

 

CUT HERE

Remove any burrs and place the 
cap supplied over the cut end.

Slide the wheel forward and place the

pin end with the plastic cap in the slot
(Fig. 10)

Remove the wheel and mark round the

inside of the four holes.

Fig.10

DRIVE UNIT

BACK PLATE

S L O T

Drill four 

 

 diameter

holes with the drill bit supplied
(Fig. 12).

Fig.12

PEDESTAL

BRACKET

P I N

Return the wheel to its normal position

and with the pin mid-way in the slot,
carefully mark round the bracket to

record its position (Fig. 1 1).

Attach the bracket and lightly tighten

the screws.

Replace the wheel making sure the pin

locates in the bracket. Turn the wheel
to confirm the bracket is correctly
positioned. If the wheel is slightly bent,
or the wheel drive slightly off centre,
the pin will move up and down in the

slot of the backplate. Provided the pin
does not reach the end of the slot this
movement is acceptable.

Fully tighten all four screws.

Summary of Contents for Autohelm 4000

Page 1: ...Distributed by Any reference to Raytheon or RTN in this manual should be interpreted as Raymarine The names Raytheon and RTN are owned by the Raytheon Company ...

Page 2: ......

Page 3: ...his can be The full system is shown below Fig 1 The system is designed for owner installation which aided by the following guide should prove to be a simple and interesting job After fitting the equipment it is only necessary to make a single adjustment to the control unit to match the autopilots response to the steering characteristics of your vessel nde8by ad ng any of the following Good Sailing...

Page 4: ... produces significant lost motion which will impair steering performance Fig 2 WliEEICI AMPS I CLUTCH LEVER DRtVE MOTOR GEARBOX 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 3 5 or 6 spokes Fig 3 Fig 3 AI8 A holes 3 and 6 spoke wheels B holes 5 spoke wheels The drive unit must be mounted between the wheel ...

Page 5: ...Fig 8 3 u the distance will change with the wheel position The smallest distance should be me asured The mounting pin should be cut 11 mm 0 40in longer than dimension A Fig 9 Fig 9 I t I CUT HERE Remove any burrs and place the plast cap supplied over the cut end l Slide the wheel forward and place the pin end with the plastic cap in the slot Fig 10 l Remove the wheel and mark round the inside of t...

Page 6: ...pping screws provided Fig 13 6 CABLING AND POWER SUPPLIES see Fig 15 The four pin v terproof connector provides a pluggable connection to the power supply and motor drive Two terminals of the socket are pre wired for connection to the 12v power supply the drive unit cable is connected to the remaining two terminals on installation It is most important that power supply is not connected to drive un...

Page 7: ...n in the following table Extension Cable Copper Area Length AWG Up to 2 5m 8ft 1 5mm2 16 Up to 4 0m 13ft 2 5mm 14 Having attached the cable to the control unit socket the socket may be screwed n place using the four self tapping screws provided Fig 17 Fig 17 Accessory Connection The Autohelm 4000 s accessories plug into the contrdl unit to facilitate stowing and servicing To ensure reliable connec...

Page 8: ...riginally set course is held irrespective of any changes in balance that may occur during the course of a passage The Autohelm 4000 s computer also continuously monitors the pattern of applied rudder correction and can distinguish unnecessary repetitive corrections caused by pitch and roll of the vessel from those necessary to maintain the selected heading The computer will automatically neglect a...

Page 9: ... keys always turn the vessel IO a a to starboard STAND BY 0 AUTO 0 Push once to disengage the windvane for manual steering The previous apparent wind angle will be memorised or Push once to change over to 44 automatic compass heading control and maintain the current heading d AUTOTACK FUNCTION The Autohelm 4000 has an automatic tacking function which operates in both compass and windvane mode as f...

Page 10: ...T PROCEDURE After completing the installation you should carry out the following functional test to familiarise yourself with the system before attempting sea trials i Plug the Autohelm 4000 into the power socket and switch on the electrical supply The unit will emit a short beep tone to indicate that it is active and the LED will i flash to indicate Stand by operating j apde Q Engage the drive by...

Page 11: ...c heading Hand Steering l Press Stand by and rotate the clutch lever fully anticlockwise for return to Automatic Sea State Control During the sea trial the operation of the automatic sea state control can be observed When the autopilot is initially 42 TO PORT engaged in Auto mode the autoprlot will respond to all pitch and roll movements During the first minute of operation it will be noticed that...

Page 12: ...gether This will silence the alarm and advance the off course alarm datum to the current compass heading CURRENT LIMITING AND CUTOUT If the autopilot is driven into its end stops the drive will be pulsed to prevent overloading the motor If the pilot is left in this condition for 30 seconds the microprocessor will automatically cut out power to the motor and sound the alarm continuously To restore ...

Page 13: ...ol unit in a damp locker over the winter lay up period MAINTENANCE All moving parts of the system have been lubricated for life at the factory Therefore no maintenance whatsoever will be required Should a fault develop the t autopilot s plugability ensures that only the defective unit need be returned Before this is done please double check that the power supply cable is sound and that all connect...

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