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' Autohelm Autopilot St4000'




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ST4000 D37301
ST4000 Autopilots Service Manual
For use on
Z326 Wheel Autopilot
Z327 Tiller Autopilot
Z332 Tiller GP Autopilot
Warning
CE Marking of Parts
If the Autohelm equipment under repair test calibration installation or setting to work carries the European CE mark
only parts and components supplied or approved for such use by Raytheon should be used in order to maintain
compliance with the relevant CE use or attachment by any means of parts or components not supplied for or not approved for such use by
Raytheon or if supplied or approved for use by Raytheon not properly fitted in accordance with instructions or recommended by Raytheon may cause the
equipment to malfunction and in particular to become unsafe or
to no longer meet the relevant CE requirements In these Raytheon Marine Europe Ltd excludes liability
to the fullest extent permissible in law for any loss or damage including any liability for its contribution to such loss or
damage by its negligent acts or omissions
ST4000 Autopilots Service Manual 831151
ST4000 Autopilots Service Manual 1 ST4000 Control Head 1
11 PCB Changes 1
12 2
ST4000 Control Head spare parts list 3
13 PCB Details 4
InputOutput Signals refer to Figure 2 Circuit Diagram 4
Circuit 5
PCB Layout 6
PCB Component list 7
Chapter 2 Fluxgate Compass Transducer 9
21 Functional test 9
22 Magnetic deviation 9
23 10
Fluxgate Compass spare parts 10
Chapter 3 Wheel Drive Actuator 11
31 Wheel Drive Actuator 11
32 12
Wheel Drive Actuator spare parts list 13
Disassembly 14
Belt removal 14
Pinion sprocket removal 14
Drive lever and eccentric removal 14
Motor removal 14
Gearbox removal 15
Gearbox disassembly 15
Assembly 16
Gearbox 16
Motor assembly 16
Adjustment eccentric assembly 16
Drive lever and eccentric assembly 17
Pinion sprocket and belt assembly 17
Drive ring closure 17
33 Setting Belt Tension 18
Tools required 18
Motor drive box 18
Motor drive box parts 19
Procedure 19
ST4000 Autopilots Service Manual 831151
ST4000 4Tiller Drive Actuator 21
41 Tiller Drive Actuator test 21
42 22
Tiller Drive Actuator spare parts list 23
Tiller Drive Actuator GP conversion kit W003 23
Chapter 5Tiller Drive Actuator GP 25
51 Tiller Drive Actuator GP test 25
52 26
Tiller Drive Actuator GP spare parts list Autopilots Service Manual 1 ST4000 Control 1 ST4000 Control Head
11 PCB Changes
When a PCB is changed it may be necessary to set the new PCB to the
required pilot type ST4000 Wheel ST4000 Tiller or ST4000 Tiller GP
1 If the instrument is disassembled fit the reflector diffuser elastomers
LCD and surround to the PCB
2 Apply 12V power to the assembly
3 Press and hold STDBY for 14 seconds until CAL is displayed
4 Momentarily press 1 and 1 together to gain access to extended
calibration dealer set up
5 Advance from the CAL LOCK page to the pilot type page by pressing
DISP
6 Use the 1 and 1 buttons to set the pilot type as required 4000 WHL
wheel or 4000 TILL tiller
7 Press STDBY to exit extended calibration
8 Switch off the power supply Do not disconnect
9 When the pilot is fully powered down switch the power on again
10Check that the required pilot type is momentarily displayed before
STANDBY is entered If not repeat the set up procedure In the case of
a second failure change the PCB
ST4000 Autopilots Service Manual 831151 1
1 3 4 5 6 7 x2 8 Note B 9 10 12 Note C 16 15
2 ST4000 Autopilots Service Manual 831151
Figure 1 ST4000 Control Head exploded view
12
11 x3 14 13 11 x8
Notes 1 Facia 10 PCB
A Earlier production units have a shim 17 fitted 2 Keypad 11 Retaining screw x11
to aid keypad compression 3 Label 12 Case seal
B The castellated top edge of the diffuser 8 fits 4 Window insert 13 Rear cover
under the legs of the LEDs on the top edge of 5 LCD surround 14 Buzzer connector
the PCB 10 6 LCD 15 Label
2 17 Note A
C It is recommended that a new case seal 12 is 7 Elastomer strip x2 16 Bulkhead gasket
fitted on assembly 8 Diffuser 17 Keypad shim earlier units only
9 Reflector
D37211
ST4000 1 ST4000 Control Head
ST4000 Control Head spare parts list
The item numbers refer to Figure 1 ST4000 Control Head exploded view
Item Spare Description Part No Comments
1 Facia W115
2 Keypad Q219
Display kit including Q220
3 Label selection Fit ST4000 label
4 Window insert
5 LCD surround
6 LCD
7 Elastomer x2
Diffuser kit including W117
8 Diffuser
9 Reflector
10 PCB Q221 PCB
Fixing kit including W120
11 Screw x11
12 Case seal W118
Back cover assembly including W119
13 Back cover Comes fitted with
Gortex filter
Sleeving
Buzzer and
14 Buzzer connecter
15 Label selection Fit ST4000 label
16 Bulkhead gasket W125
Sun cover D340 Not ST4000 Autopilots Service Manual
831151 3
ST4000 Autopilots
13 PCB Details
InputOutput Signals refer to Figure 2 Circuit Diagram
Pin No Signal Description
PL11 12V Nominal 12V dc
PL12 0V in 0V
PL13 SeaTalk Intermittent streams of nominal 12V pulses
PL21 12V Nominal 12V dc
PL22 0V in 0V
PL23 SeaTalk Intermittent streams of nominal 12V pulses
P1 12V Nominal 12V dc
P2 0V in 0V
P3 SCRN 0V
P4 Bias Nominal 25V dc VRESET
P5 FGA 25V dc
P6 FGB 25V dc
P7 Coil drive AC signal 17 cycles at 79kHz driven twice
every 116 second
P8 Rudder reference Nominal 5V supply to rudder reference
supply
P9 Rudder reference 0 to 5V dc nominal rudder reference output
P10 Rudder reference 0V 0V
P11 SCRN 0V
C Clutch 12V if Autopilot engaged otherwise 0V
C Clutch 0V 0V
MD1 MD1 When Autopilot engaged and depending on
direction of drive intermittent variable length
pulses nominal 12V otherwise 0V
MD2 MD2 When Autopilot engaged and depending on
direction of drive intermittent variable length
pulses nominal 12V otherwise 0V
NMEA in NMEA Intermittent streams of nominal 12V pulses
NMEA in NMEA 0V
4 ST4000 Autopilots Service Manual 1 ST4000 Control Diagram
2 Circuit Diagram
ST4000 Autopilots Service Manual 831151 5
ST4000 Autopilots
PCB Layout
Taken from Drawing No 4376001 Issue P Date 031097 D37221
Figure 3 PCB Component Layout
6 ST4000 Autopilots Service Manual 1 ST4000 Control Head
PCB Component list
Taken from Drawing No 4376001 Issue P Date 031097 D37241
ST4000 Autopilots Service Manual 831151 7
ST4000 ST4000 Autopilots Service Manual 2 Fluxgate Compass 2 Fluxgate Compass Transducer
21 Functional test
Disconnect the Fluxgate from the Autopilot and check continuity as follows
Cable colour Connector pin number Resistance
Screen to blue 24 10 ohms
Red to green 35 5 ohms
Red to yellow 36 5 ohms
Red to screen 32 Open circuit
22 Magnetic deviation
The Fluxgate Compass requires careful siting if optimum Autopilot
performance is to be acheived The SeaTalk electronics is able to correct the
compass for most deviating magnetic fields present when the procedure is carried out Any further deviation introduced after
will introduce an error between the Fluxgate and the ships compass This
can be removed by carrying out the linearisation again If the displayed
deviation is greater than 15 degrees the Fluxgate should be resited
Note The linearisation procedure should always be carried out if the
Fluxgate has been exchanged removed or moved from its original mounting
ST4000 Autopilots Service Manual 831151 9
ST4000 1 2 4 7
3 6 5 9
1 Cover
2 Seal 6 Fluxgate subassembly
3 Pivot retaining screw x2 7 Body
4 Bracket 8 Body screw x4
5 Pivot subassembly 9 Cable
4 Fluxgate Compass exploded view
Fluxgate Compass spare parts list
The item numbers refer to Figure 4 Fluxgate Compass exploded view
Item Spare Description Part No Comments
Compass base kit including M096
3 Pivot retaining screw x2
4 Bracket
Fluxgate subassembly including M022
5 Pivot subassembly x2
6 Fluxgate ST4000 Autopilots Service Manual 3 Wheel Drive 3 Wheel Drive Actuator
31 Wheel Drive Actuator test
Carry out the passive and active tests detailed in Figure 6
FuseCB
Switch
12V 15A
D23861
Figure 5 Wheel Drive Actuator test connections
Start
Connect power supply
as in Figure 5
Visually inspect unit
Switch on and with clutch
No Change damaged engaged check drive ring
components moves and current is less
Yes than 2A
Check gears belt
Rotate drive ring by hand No rollers belt
with clutch disengaged tension eccentric
Yes drive lever motor
Check gears No belt rollers
as necessary
OK belt tension
eccentric drive
Yes lever motor
Restrain drive ring rotation
until 65A is obtained Check
Changeadjust that belt does not slip
as necessary
Check resistance across Yes
motor connector pins 2 and 3
Reverse polarity of supply
is approximately 1 to 2 ohms
Switch onCheck drive ring
No Check wiring moves in opposite direction
OK and connector to that of first test and
current is less than 2A
No Check gears belt
No rollers belt
Yes tension eccentric
Yes drive lever motor
Check motor
as necessary
Change as
necessary
Restrain drive ring rotation
until 65A is obtained Check
that belt does not slip
Actuator OK
End of test
D23901
Figure 6 Wheel Drive Actuator test flowchart
ST4000 Autopilots Service Manual 831151 11
5 11 16 17 18 10 20x2 19 21 9 8 32 33 34 35 36 37
12 ST4000 Autopilots Service Manual 831151
Figure 7 Wheel Drive Actuator exploded view
32
23 24 25 26 27 28 29 30 31
14 15
Large chamfer of
adjustment locking
nut to face
protective cap
14 15
1 Drive ring 13 Adjustment wheel assembly 25 Flux ring
2 Back mounting plate 14 Adjustment locking nut 26 Motor location peg
assembly 15 Protection cap 27 Motor
3 Screw x5 16 Roller screw x7 28 Motor clamp
4 Support plate 17 Washer x7 29 Motor clamp O ring
5 Belt 18 Roller x7 30 Connector
6 Bearing 19 Pin 31 Connector seal
7 Pinion sprocket 20 Shim x2 32 Sleeve
8 Roll pin 21 Gearbox drive shaft 33 End cap O ring
9 Drive lever gear carrier C 34 End cap
10 Drive wheel assembly 22 Gearbox retaining screw x4 35 Sealing cap
11 Drive eccentric assembly 23 Gearbox 36 Connector nut
1 3x5 4 6 7 12 13 22x4 2 12 Adjustment eccentric assembly 24 Red motor seal 37 Cable assembly
D37271
ST4000 3 Wheel Drive Actuator
Wheel Drive Actuator spare parts list
The item numbers refer to Figure 7 Wheel Drive A ctuator exploded view
Item Spare Description Part No Comments
1 Drive ring N031
2 Back mounting plate assembly N013 Comes fitted with
gearbox item 23
5 Belt D169
Pinion kit including N014
7 Pinion sprocket
15 Protection cap
19 Pin
20 Shim x2
Drive lever kit including N011
8 Roll pin
9 Drive lever
11 Drive eccentric assembly N024
Gearbox drive shaftgear N026
carrier C kit including
21 Gearbox drive shaft
gear carrier C See Figure 8 item 3
Planet gear x12 See Figure 8 item 4
Shim See Figure 8 item 2
O ring See Figure 8 item 1
27 Motor N012
Wiring kit including Q106
28 Motor clamp
29 Motor clamp O ring
30 Connector
31 Connector seal
33 End cap O ring
34 End cap
35 Sealing cap
36 Connector nut
37 Cable assembly
ST4000 Autopilots Service Manual 831151 13
ST4000 Autopilots
Disassembly
Belt removal
Refer to Figure 7 Wheel Drive Actuator exploded view
1 Insert a wide flat nonmetalic blade into the gap between the drive ring
1 and the back mounting plate 2 Gently lever the blade to force the
drive ring 1 off the rollers 18 of the back mounting plate 2 Repeat
this action in three to four places around the drive ring 1 in order to
remove
2 Unscrew and remove the five screws 3 Detach the support plate 4
from the back mounting plate 2
3 Remove the belt 5
Pinion sprocket removal
Refer to Figure 7 Wheel Drive Actuator exploded view
1 Perform actions as described in Belt removal
2 Lift the pinion sprocket 7 off the gearbox drive shaftgear carrier C 21
Drive lever and eccentric removal
Refer to Figure 7 Wheel drive actuator exploded view
1 Perform actions as described in Pinion sprocket removal
2 Place a block with a suitable clearance hole under the drive levershaft
9 to provide support and prevent the shaft bending when the roll pin is
driven out
3 Drive out the roll pin 8
4 Pull the drive lever 9 off the drive eccentric shaft 11
5 Lift the drive eccentric assembly 11 and drive wheel assembly 10 off
the back mounting plate 2
Motor removal
Refer to Figure 7 Wheel Drive Actuator exploded view
1 Unscrew and remove the connector nut 36
2 Remove the sealing cap 35
3 Grip the gearbox 23 unscrew and remove the sleeve 32 ensuring the
connector does not rotate
4 Withdraw motor 27location peg 26 disengaging it from the gearbox
23 Slide off the flux ring 25
Note Although given separate item numbers the gearbox 23 is an
integral part of the back mounting plate assembly 2 and the location
peg 26 is part of the motor 27
14 ST4000 Autopilots Service Manual 3 Wheel Drive Actuator
5 Desolder connector wires from the motor tags
Gearbox removal
Refer to Figure 7 Wheel Drive Actuator exploded view
1 Perform actions as described in Pinion sprocket removal
and 1 2 3 and 4 in Motor removal
2 Unscrew and remove the four gearbox retaining screws 22
3 Separate the gearbox 23 from the back mounting plate assembly 2
leaving the gearbox drive shaftgear carrier C 21 in place
4 Support the gearbox drive shaftgear carrier C 21 and drive out the pin19
5 Withdraw the gearbox drive shaftgear carrier C 21 from the back
mounting plate assembly 2
Gearbox 8
5 5
5 5
4 4
4 2
1 O ring 5 Large shim spacer x7
2 Small shim spacer 6 Carrier assembly B
3 Drive shaftcarrier assembly C 7 Carrier assembly A x2
4 Planet gear x22 8 Gear housing
D37251
Figure 8 Gearbox exploded view
ST4000 Autopilots Service Manual 831151 15
ST4000 Autopilots
Assembly
In all cases assembly is a straight reversal of the steps described in
Gearbox assembly
Refer to Figure 7 Wheel Drive Actuator exploded view
1 Rebuild gearbox Refer to Figure 8 Gearbox exploded view
2 Fix the gearbox 23 to the back mounting plate assembly 2 using the
four gearbox retaining screws 22
3 Slide the two shims 20 over the gearbox drive shaftgear carrier C 21
and hard up against the back mounting plate assembly 2
4 Support the gearbox drive shaftgear carrier C 21 and refit the pin 19
Note If the original pin 19 is bent or damaged a replacement pin can be
obtained from pinion kit part no N014
Motor assembly
Refer to Figure 7 Wheel Drive Actuator exploded view
1 Fit the red motor seal 24 over the threaded end of the gearbox 23
2 Insert the connector wires through the motor clamp 28 and solder the
connector wires to the motor tags red lead to the tag with a red spot
black lead to the other motor tag
3 Slide flux ring 25 on the motor 27 and fit onto the gearbox 23
ensuring that the motor drive gear is fully engaged with the gear train and
the motor location peg 26 is engaged correctly into the gearbox 23
4 Fit the O ring 29 onto the motor clamp 28
5 Place the connector seal 31 over the connector 30
6 Screw the sleeve 32 with fitted O ring 33 and end cap 34 onto the
gearbox 23
7 Place the sealing cap 35 over the connector 36 and secure with the
connector nut 37
Adjustment eccentric assembly
Refer to Figure 7 Wheel Drive Actuator exploded view
1 Assemble the adjustment wheel assembly 13 adjustment eccentric
assembly 12 adjustment lock nut 14 with its chamfered edge facing
outwards and protection cap 15 to the back mounting plate assembly 2
Note Ensure that the drive lever 9 is in the slack declutched position
and the adjustment eccentric assembly 12 is in its lowest position so
that the belt 5 is at its ST4000 Autopilots Service Manual 3 Wheel Drive Actuator
Drive lever and eccentric assembly
Refer to Figure 7 Wheel Drive Actuator exploded view
1 Assemble the drive eccentric assembly 11 and drive wheel assembly
10 to the back mounting plate assembly 2
2 Slide the drive lever 9 onto the drive eccentric assembly 11 Support
the drive lever 9 and insert the roll pin 8
Note Always use a new roll pin 8 on refit
Pinion sprocket and belt assembly
Refer to Figure 7 Wheel Drive Actuator exploded view
1 Slot the pinion sprocket 7 over the gearbox drive shaft 21 and pin 19
2 With the drive lever 9 in its slack declutched position and the
adjustment eccentric assembly 12 is in its lowest position fit the belt 5
around the pinion sprocket 7 drive wheel assembly 10 and
adjustment wheel assembly 13
3 Position the support plate 4 with fitted bearing 6 onto the gearbox
drive shaft 21 drive eccentric assembly 11 adjustment eccentric
assembly 12 and over the screw pillars Insert the five screws 3 and
secure the support plate 4
Note Take care not to cut new threads in the screw pillars when securing
the support plate 4
Drive ring closure
Refer to Figure 7 Wheel Drive Actuator exploded view
1 Rest the drive ring 1 over the rollers 18
2 Locate the rollers 18 nearest the gearbox 23 into the groove of the
drive ring 1 Push down and around the drive ring 1 to snap the drive ring 1 over the remaining rollers 18
3 Spin the drive ring 1 in both directions two or three times too ensure
the assembly is fully seated and free running
ST4000 Autopilots Service Manual 831151 17
ST4000 Autopilots
33 Setting Belt Tension
The purpose of the belt tensioning procedure is to ensure that
1 The belt is sufficiently tight to transmit the normal maximum drive
torques
2 The belt is not as this will increase the backdrive load to a
level where it can be felt on the vessels wheel
Tools required
4000 Drive unit torque fixture
Service tool number T033
4000 Drive unit torque adjuster
Service tool number T032
Motor drive box and ammeter
Motor drive box
LM396K
121R Red ZO78
Brown Z077
BATTERY ACTUATOR
Blue
D1 C1 C2 R2 C3 C4 R3
MR752 4700uF 47uF 845R 22uF 47uF 1KO
D23841
Figure 9 Motor drive box circuit ST4000 Autopilots Service Manual 3 Wheel Drive Actuator
Motor drive box parts
Component Description
R1 Resistor 121R 01 metal film
R2 Resistor 845R 01 metal film
R3 Resistor 1k0 05W
C1 Capacitor 4700uF 20 electrolytic 25V
C2 Capacitor 47uF 10 solid tantalum 35V
C3 Capacitor 22uF 10 solid tantalum 35V
C4 Capacitor 47uF 10 solid tantalum 35V
D1 Diode MR 752
IC1 LM396K High power 10A regulator
F1 Fuse 15A quick blow
Fuseholder 114 inch
SW1 Switch Single pole single throw
TO3 Insulating kit
Diecast box
Procedure
1 Screw the drive ring clamp to the front ring Use the group of two holes on
their own not two holes in a group of four Screw the torque restraint pin
into the back mounting plate
2 Connect the motor to the motor drive box using an in line ammeter 0
10 amps to measure current
3 Connect the motor drive box to a 12V battery The drive box provides a
regulated 105V supply to the motor
4 Engage the drive unit clutch
5 Use the eccentric adjuster to loosen anti clockwise the locking nut and
allow the eccentric to move to the minimum tension position
6 Switch on the drive to the motor and using a 15mm Allen key rotate the
eccentric anticlockwise as viewed from above to increase belt tension
until the belt just stops slipping motor stalled
7 Check that the motor current is approximately 65 amps
8 Tighten the locking nut apply Loctite to retain the setting and switch off
the motor drive
ST4000 Autopilots Service Manual 831151 19
ST4000 ST4000 Autopilots Service Manual 4 Tiller Drive 4 Tiller Drive Actuator
41 Tiller Drive Actuator test
Carry out the passive and active tests detailed in Figure 11Tiller Drive Actuator
test Blue
FuseCB 1
12A 2 3
Brown
Switch Blue Brown
Actuator deck plug
12V 15A
D23941
Figure 10Tiller Drive Actuator test Start
Connect power supply
Visually inspect unit as in Figure 10
No Change damaged
components
Yes Switch on
check thrust rod moves and
current less than 25A
Extend and retract
thrust arm by hand Check gears
No thrust rod
actuator body
Check gears Yes motor
No thrust rod
OK actuator body
motor Change
Yes as necessary
Change
as necessary Switch off
Reverse connections to PSU
Check resistance across
motor connector pins 2 and 3 Switch on
is approximately 1 to 2 ohms Check thrust rod moves
in opposite direction
No Check wiring to that of first test and
OK and connector current less than 25A
OK Check gears
No thrust rod
Yes actuator body
Yes motor
Check motor
Change
Change as as necessary
necessary
Actuator OK
End of test
D37281
Figure 11 Tiller Drive Actuator test flowchart
ST4000 Autopilots Service Manual 831151 21
1 Ram cap 9 Flux ring 3
2 Thrust tube 10 Motor sleeve
3 Lead screw assembly 11 End cap assembly
4 Planet gear x4 12 Cable clamp
5 Shim 13 Clamp seal
6 O ring x3 14 Cable clamp nut
7 Gear annulus 15 SeaTalk deck plug
8 Motor Q114
Notes
A Ensure cable clamp nut 14 is unscrewed before 7
undoing the motor sleeve Notes B C
B The hole in the gear annulus 7 that accepts the 6
drive gear of the motor 8 is of a different diameter 5
to that of the ST4000 GP gear annulus 4 x4
C Care should be taken not to crossthread the
22 ST4000 Autopilots Service Manual 831151
annulus 7 when screwing into the thrust tube 2
Figure 12 Tiller Drive Actuator exploded view
42 1
Note A
End view of Annulus 7
ST4000 ST4000 GP
13mm diameter 16mm diameter
D23951
ST4000 4 Tiller Drive Actuator
Tiller Drive Actuator spare parts list
The item numbers refer to Figure 12 Tiller Drive Actuator exploded view
Item Spare Description Part No Comments
Drive module Q047 Complete drive unit
8 Motor Q114
11 End cap assembly W014
Tiller Drive Actuator GP conversion kit W003
This GP conversion kit W003 gives the option of converting the ST4000
which has the power to helm boats of up to 6500 kg 14300 lbs
displacement to the ST4000 GP which would push the limit up to 9000 kg
20000 lbs 1 2 3 4 3 5 6
1 Planet gear x4
2 Shim
3 O ring x3
4 Gear annulus
5 Motor
6 Motor spacer
7 Cable tie
8 Motor sleeve 8 3 9
9 End cap assembly
D23971
Figure 13 Tiller Drive Actuator GP conversion kit W003
ST4000 Autopilots Service Manual 831151 23
ST4000 ST4000 Autopilots Service Manual 5 Tiller Drive Actuator GP
Chapter 5 Tiller Drive Actuator GP
51 Tiller Drive Actuator GP test
Carry out the passive and active tests detailed in Figure 15Tiller Drive Actuator
GP test Blue
FuseCB 1
12A 2 3
Brown
Switch Blue Brown
Actuator deck plug
12V 15A
D23981
Figure 14Tiller Drive Actuator GP test Start
Connect power supply
Visually inspect unit as in Figure 10
No Change damaged
components
Yes Switch on
check thrust rod moves and
current less than 2A
Extend and retract
thrust arm by hand Check gears
No thrust rod
actuator body
Check gears Yes motor
No thrust rod
OK actuator body
motor Change
Yes as necessary
Change
as necessary Switch off
Reverse connections to PSU
Check resistance across
motor connector pins 2 and 3 Switch on
is approximately 1 to 2 ohms Check thrust rod moves
in opposite direction
No Check wiring to that of first test and
OK and connector current less than 2A
OK Check gears
No thrust rod
Yes actuator body
Yes motor
Check motor
Change
Change as as necessary
necessary
Actuator OK
End of test
D37311
Figure 15Tiller Drive Actuator GP test flowchart
ST4000 Autopilots Service Manual 831151 25
1 Ram cap 9 Cable tie 3
2 Thrust tube 10 Motor spacer
3 Lead screw assembly 11 Motor sleeve
4 Planet gear x4 12 End cap assembly
5 Shim 13 Cable clamp
6 O ring x3 14 Clamp seal
7 Gear annulus 15 Cable clamp nut
8 Motor 16 SeaTalk deck plug
Notes 6
A Ensure cable clamp nut 15 is unscrewed before
undoing the motor sleeve Notes B C
B The hole in the gear annulus 7 that accepts the 6
drive gear of the motor 8 is of a different diameter 5
to that of the ST4000 gear annulus 4 x4
26 ST4000 Autopilots Service Manual 831151
C Care should be taken not to crossthread the
annulus 7 when screwing into the thrust tube 2
Figure 16 Tiller Drive Actuator GP exploded view
52 1
Note A
End view of Annulus 7
10 ST4000 ST4000 GP
13mm diameter 16mm diameter
D23961
ST4000 5 Tiller Drive Actuator GP
Tiller Drive Actuator GP spare parts list
The item numbers refer to Figure 16 Tiller drive actuator GP exploded view
Item Spare Description Part No Comments
Drive module Q086 Complete drive unit
ST4000 GP kit incuding W003 Serves as an upgrade
4 Planet gear x4 conversion kit for the
5 Shim ST4000 tiller drive
6 O ring x3 actuator
7 Annulus
8 Motor
9 Cable tie
10 Motor spacer
11 Motor sleeve
12 End cap assembly
ST4000 Autopilots Service Manual 831151 27
ST4000 ST4000 Autopilots Service Manual ST4000 Autopilots Service Manual 831151
ST4000 Marine Company Raytheon Marine Europe Limited
676 Island Pond Road Anchorage Park Hampshire PO3 5TD
New Hampshire 031095420
Tel 01705 693611
Tel 001 603 647 7530 Fax 01705 694642
Fax 001 603 634 4756 http Autopilots Service Manual 831151

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