ST4000+ Autopilots
D3730-1
ST4000+ Autopilots Service Manual
For use on
Z326, Wheel Autopilot
Z327, Tiller Autopilot
Z332, Tiller GP Autopilot
Warning
CE Marking of Equipment/Replacement 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 requirements.
Incorporation, 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 published, provided 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 circumstances, 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 83115-1
ST4000+ Autopilots Service Manual 83115-1
ST4000+ Autopilots
Contents
Contents
Chapter 1. ST4000+ Control Head ......................................................................................... 1
1.1 PCB Changes ................................................................................................. 1
1.2 Disassembly/Assembly .................................................................................... 2
ST4000+ Control Head spare parts list ........................................................... 3
1.3 PCB Details .................................................................................................... 4
Input/Output Signals (refer to Figure 2. Circuit Diagram) ................................... 4
Circuit Diagram..................................................................................... 5
PCB Layout .................................................................................................. 6
PCB Component list ............................................................................. 7
Chapter 2. Fluxgate Compass Transducer ............................................................................ 9
2.1 Functional test ................................................................................................. 9
2.2 Magnetic deviation .......................................................................................... 9
2.3 Disassembly/assembly ................................................................................... 10
Fluxgate Compass spare parts list................................................................ 10
Chapter 3. Wheel Drive Actuator ......................................................................................... 11
3.1 Wheel Drive Actuator test ................................................................................ 11
3.2 Disassembly/assembly ................................................................................... 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 assembly.............................................................................. 16
Motor assembly .................................................................................. 16
Adjustment eccentric assembly ........................................................... 16
Drive lever and eccentric assembly ...................................................... 17
Pinion sprocket and belt assembly ....................................................... 17
Drive ring closure ................................................................................ 17
3.3 Setting Belt Tension ........................................................................................ 18
Tools required: ............................................................................................ 18
Motor drive box ........................................................................................... 18
Motor drive box parts .......................................................................... 19
Procedure ................................................................................................. 19
ST4000+ Autopilots Service Manual 83115-1
ST4000+ Autopilots
Chapter 4. Tiller Drive Actuator ............................................................................................ 21
4.1 Tiller Drive Actuator test .................................................................................. 21
4.2 Disassembly/assembly ................................................................................... 22
Tiller Drive Actuator spare parts list ............................................................... 23
Tiller Drive Actuator GP conversion kit (W003) ............................................... 23
Chapter 5. Tiller Drive Actuator GP ...................................................................................... 25
5.1 Tiller Drive Actuator GP test ............................................................................ 25
5.2 Disassembly/assembly ................................................................................... 26
Tiller Drive Actuator GP spare parts list ......................................................... 27
ST4000+ Autopilots Service Manual 83115-1
Chapter 1. ST4000+ Control Head
Chapter 1. ST4000+ Control Head
1.1 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 instrument/PCB 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
10.Check 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 83115-1 1
1.2 Disassembly/Assembly
ST4000+ Autopilots
Figure 1: ST4000+ Control Head exploded view
2 ST4000+ Autopilots Service Manual 83115-1
Chapter 1. ST4000+ Control Head
8
9
10
14
15
16
3
4
5
6
7
ST4000+ Control Head spare parts list
The item numbers refer to Figure 1: ST4000+ Control Head exploded view
Item
1
2
11
12
13
Spare Description
Facia
Keypad
Display kit, including
Label (selection)
Window insert
LCD surround
LCD
Elastomer (x2)
Diffuser kit, including
Diffuser
Reflector
PCB
Fixing kit, including
Screw (x11)
Case seal
Back cover assembly, including
Back cover
Part No.
W115
Q219
Q220
W117
Q221
W120
W118
W119
Comments
Fit ST4000+ label
ST4000+/ST5000+ PCB
Comes fitted with,
Gortex filter,
Sleeving,
Buzzer and
Buzzer connecter
Fit ST4000+ label Label (selection)
Bulkhead gasket
Sun cover
W125
D340 Not illustrated
ST4000+ Autopilots Service Manual 83115-1 3
ST4000+ Autopilots
1.3 PCB Details
P8
P9
P10
P11
C+
C–
MD1
P5
P6
P7
Pin No.
PL1/1
PL1/2
PL1/3
PL2/1
P2
P3
P4
PL2/2
PL2/3
P1
Input/Output Signals (refer to Figure 2. Circuit Diagram)
MD2
NMEA in+
NMEA in–
Signal
+12V
0V in
SeaTalk
+12V
0V in
SeaTalk
+12V
0V in
SCRN
Bias
F/GA
F/GB
Coil drive
Rudder reference supply
Rudder reference
Rudder reference 0V
SCRN
Clutch
Clutch 0V
MD1
MD2
NMEA+
NMEA–
Description
Nominal 12V dc
0V
Intermittent streams of (nominal) 12V pulses
Nominal 12V dc
0V
Intermittent streams of (nominal) 12V pulses
Nominal 12V dc
0V
0V
Nominal 2.5V dc (VRESET)
+2.5V dc
+2.5V dc
AC signal, 17 cycles at 7.9kHz, driven twice every 1/16 second
Nominal 5V supply to rudder reference
0 to 5V dc (nominal) rudder reference output
0V
0V
+12V if Autopilot engaged; otherwise 0V
0V
When Autopilot engaged and depending on direction of drive, intermittent variable length pulses, nominal 12V; otherwise 0V
When Autopilot engaged and depending on direction of drive, intermittent variable length pulses, nominal 12V; otherwise 0V
Intermittent streams of (nominal) 12V pulses
0V
4 ST4000+ Autopilots Service Manual 83115-1
Chapter 1. ST4000+ Control Head
Circuit Diagram
Figure 2: Circuit Diagram
ST4000+ Autopilots Service Manual 83115-1 5
PCB Layout
ST4000+ Autopilots
Taken from Drawing No: 4376-001 Issue: P Date: 03.10.97
Figure 3: PCB Component Layout
6 ST4000+ Autopilots Service Manual 83115-1
D3722-1
Chapter 1. ST4000+ Control Head
PCB Component list
Taken from Drawing No: 4376-001 Issue: P Date: 03.10.97
D3724-1
ST4000+ Autopilots Service Manual 83115-1 7
8 ST4000+ Autopilots Service Manual 83115-1
ST4000+ Autopilots
Chapter 2. Fluxgate Compass Transducer
Chapter 2. Fluxgate Compass Transducer
2.1 Functional test
Disconnect the Fluxgate from the Autopilot and check continuity as follows:
Cable colour
Screen to blue
Red to green
Red to yellow
Red to screen
Connector pin number
2/4
3/5
3/6
3/2
Resistance
< 10 ohms
< 5 ohms
< 5 ohms
Open circuit
2.2 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 linearisation procedure is carried out. Any further deviation, introduced after linearisation, will introduce an error between the Fluxgate and the ship’s 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 position.
ST4000+ Autopilots Service Manual 83115-1 9
ST4000+ Autopilots
2.3 Disassembly/assembly
1 2 4 7
8
Figure 4. Fluxgate Compass exploded view
3 6
1. Cover
2. Seal
3. Pivot retaining screw (x2)
4. Bracket
5. Pivot sub-assembly
5
6. Fluxgate sub-assembly
7. Body
8. Body screw (x4)
9. Cable
9
5
6
3
4
Fluxgate Compass spare parts list
The item numbers refer to Figure 4: Fluxgate Compass exploded view
Item Spare Description
Compass base kit, including
Pivot retaining screw (x2)
Bracket
Fluxgate sub-assembly, including
Pivot sub-assembly (x2)
Fluxgate sub-assembly
Part No.
M096
M022
Comments
D3726-1
10 ST4000+ Autopilots Service Manual 83115-1
Chapter 3. Wheel Drive Actuator
Chapter 3. Wheel Drive Actuator
3.1 Wheel Drive Actuator test
Carry out the passive and active tests detailed in Figure 6.
Fuse/CB
12A
Switch
PSU
12V 15A
D2386-1
Figure 5. Wheel Drive Actuator test connections
Start
Visually inspect unit
OK
No
Yes
Rotate drive ring by hand with clutch disengaged
Change damaged components
OK
No
Yes
Check gears, belt, rollers, belt tension, eccentric, drive lever, motor
Change/adjust
as necessary
Check resistance across motor connector pins 2 and 3
is approximately 1 to 2 ohms
OK
No
Yes
Check wiring and connector
OK
No
Yes
Check motor
Connect power supply as in Figure 5
Switch on, and with clutch engaged, check drive ring moves and current is less than 2A
OK
No
Yes
Check gears, belt, rollers, belt tension, eccentric, drive lever, motor
Change/adjust
as necessary
Restrain drive ring rotation until 6.5A is obtained. Check that belt does not slip.
OK
No
Yes
Reverse polarity of supply
Switch on.Check drive ring moves in opposite direction to that of first test and current is less than 2A
OK
No
Yes
Check gears, belt, rollers, belt tension, eccentric, drive lever, motor
Change/adjust
as necessary
Change as necessary
Restrain drive ring rotation until 6.5A is obtained. Check that belt does not slip.
OK
No
Yes
Actuator OK.
End of test
D2390-1
Figure 6. Wheel Drive Actuator test flowchart
ST4000+ Autopilots Service Manual 83115-1 11
3.2 Disassembly/assembly
ST4000+ Autopilots
Figure 7. Wheel Drive Actuator exploded view
12 ST4000+ Autopilots Service Manual 83115-1
Chapter 3. Wheel Drive Actuator
8
9
11
21
–
–
–
27
28
29
30
31
33
34
35
36
37
7
15
19
20
Wheel Drive Actuator spare parts list
The item numbers refer to Figure 7: Wheel Drive A ctuator exploded view
Item
1
2
Spare Description
Drive ring
Back mounting plate assembly
Part No.
N031
N013
Comments
Comes fitted with, pre-assembled gearbox, item 23
5 Belt
Pinion kit, including
Pinion sprocket
Protection cap
Pin
Shim (x2)
Drive lever kit, including
Roll pin
Drive lever
Drive eccentric assembly
Gearbox drive shaft/gear carrier ‘C’ kit, including
Gearbox drive shaft/ gear carrier ‘C’
Planet gear (x12)
Shim
‘O’ ring
Motor
Wiring kit, including
Motor clamp
Motor clamp ‘O’ ring
Connector
Connector seal
End cap ‘O’ ring
End cap
Sealing cap
Connector nut
Cable assembly
D169
N014
N011
N024
N026
N012
Q106
See Figure 8, item 3
See Figure 8, item 4
See Figure 8, item 2
See Figure 8, item 1
ST4000+ Autopilots Service Manual 83115-1 13
ST4000+ Autopilots
Disassembly
Belt removal
Refer to Figure 7. Wheel Drive Actuator exploded view.
1. Insert a wide flat, non-metalic 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 shaft/gear 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 lever/shaft
(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 (27)/location 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 83115-1
Chapter 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 shaft/gear carrier ‘C’ (21) in place.
4. Support the gearbox drive shaft/gear carrier ‘C’ (21) and drive out the pin (19).
5 Withdraw the gearbox drive shaft/gear carrier ‘C’ (21) from the back mounting plate assembly (2).
Gearbox disassembly
8
5
5
4
7
Figure 8. Gearbox exploded view
5
5
4
5
4
6
7
1. 'O' ring
2. Small shim spacer
3. Drive shaft/carrier assembly 'C'
4. Planet gear (x22)
4
4
5
5
3
2
1
5. Large shim spacer (x7)
6. Carrier assembly 'B'
7. Carrier assembly 'A' (x2)
8. Gear housing
D3725-1
ST4000+ Autopilots Service Manual 83115-1 15
ST4000+ Autopilots
Assembly
In all cases, assembly is a straight reversal of the steps described in
Disassembly
.
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 shaft/gear carrier ‘C’ (21) and hard up against the back mounting plate assembly (2).
4. Support the gearbox drive shaft/gear 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 slackest.
16 ST4000+ Autopilots Service Manual 83115-1
Chapter 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 progressively 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 83115-1 17
ST4000+ Autopilots
3.3 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 over-tightened, as this will increase the backdrive load to a level where it can be felt on the vessel’s 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
FS1
15A
12V
BATTERY
SW1
IC1
LM396K
R1
121R
D1
MR752
+
C1
4700uF
+
C2
4.7uF
R2
845R
+
C3
22uF
+
C4
4.7uF
R3
Red (ZO78)
Brown (Z077)
ACTUATOR
Blue
1KO
D2384-1
Figure 9. Motor drive box circuit diagram
18 ST4000+ Autopilots Service Manual 83115-1
Chapter 3. Wheel Drive Actuator
Motor drive box parts
C2
C3
C4
D1
IC1
F1
Component
R1
R2
R3
C1
SW1
Description
Resistor 121R 0.1% metal film
Resistor
Resistor
845R 0.1% metal film
1k0 0.5W
Capacitor 4700uF 20% electrolytic 25V
Capacitor 4.7uF 10% solid tantalum 35V
Capacitor 22uF 10% solid tantalum 35V
Capacitor 4.7uF 10% solid tantalum 35V
Diode
LM396K
MR 752
High power 10A regulator
Fuse 15A quick blow
Fuseholder 1.1/4 inch
Switch
TO3
Diecast box
Single pole single throw
Insulating kit
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 10.5V 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 1.5mm 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 6.5 amps
8. Tighten the locking nut, apply Loctite to retain the setting and switch off the motor drive.
ST4000+ Autopilots Service Manual 83115-1 19
20 ST4000+ Autopilots Service Manual 83115-1
ST4000+ Autopilots
Chapter 4. Tiller Drive Actuator
Chapter 4. Tiller Drive Actuator
4.1 Tiller Drive Actuator test
Carry out the passive and active tests detailed in Figure 11. Tiller Drive Actuator test flowchart.
Blue
Brown
Fuse/CB
12A
Switch
1
2 3
Blue Brown
Actuator deck plug
PSU
12V 15A
D2394-1
Figure 10. Tiller Drive Actuator test connections
Start
Visually inspect unit
OK
No
Yes
Change damaged components
Extend and retract thrust arm by hand
OK
No
Yes
Check gears, thrust rod, actuator body, motor
Change
as necessary
Check resistance across motor connector pins 2 and 3
is approximately 1 to 2 ohms
OK
No
Yes
Check wiring and connector
OK
No
Yes
Check motor
Change as necessary
Connect power supply as in Figure 10.
Switch on, check thrust rod moves and current less than 2.5A
OK
No
Yes
Check gears, thrust rod, actuator body, motor
Change
as necessary
Switch off.
Reverse connections to PSU
Switch on.
Check thrust rod moves in opposite direction to that of first test and current less than 2.5A
OK
No
Yes
Check gears, thrust rod, actuator body, motor
Change
as necessary
Actuator OK.
End of test
D3728-1
Figure 11. Tiller Drive Actuator test flowchart
ST4000+ Autopilots Service Manual 83115-1 21
4.2 Disassembly/assembly
ST4000+ Autopilots
Figure 12. Tiller Drive Actuator exploded view
22 ST4000+ Autopilots Service Manual 83115-1
Chapter 4. Tiller Drive Actuator
Tiller Drive Actuator spare parts list
The item numbers refer to Figure 12: Tiller Drive Actuator exploded view
Item
8
11
Spare Description
Drive module
Motor
End cap assembly
Part No.
Q047
Q114
W014
Comments
Complete drive unit
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 6,500 kg (14,300 lbs) displacement, to the ST4000+ GP which would push the limit up to 9,000 kg
(20,000 lbs) displacement.
1 2 3 4 3 5 6
7
1. Planet gear (x4)
2. Shim
3. 'O' ring (x3)
4. Gear annulus
5. Motor
6. Motor spacer
7. Cable tie
8. Motor sleeve
9. End cap assembly
Figure 13. Tiller Drive Actuator GP conversion kit (W003)
8 3 9
D2397-1
ST4000+ Autopilots Service Manual 83115-1 23
24 ST4000+ Autopilots Service Manual 83115-1
ST4000+ Autopilots
Chapter 5. Tiller Drive Actuator GP
Chapter 5. Tiller Drive Actuator GP
5.1 Tiller Drive Actuator GP test
Carry out the passive and active tests detailed in Figure 15. Tiller Drive Actuator
GP test flowchart.
Blue
Brown
Fuse/CB
12A
Switch
1
2 3
Blue Brown
Actuator deck plug
PSU
12V 15A
D2398-1
Figure 14. Tiller Drive Actuator GP test connections
Start
Visually inspect unit
OK
No
Yes
Change damaged components
Connect power supply as in Figure 10.
Switch on, check thrust rod moves and current less than 2A
Extend and retract thrust arm by hand
OK
No
Yes
Check gears, thrust rod, actuator body, motor
Change
as necessary
Check resistance across motor connector pins 2 and 3
is approximately 1 to 2 ohms
OK
No
Yes
Check wiring and connector
OK
No
Yes
Check motor
OK
No
Yes
Switch off.
Reverse connections to PSU
Switch on.
Check thrust rod moves in opposite direction to that of first test and current less than 2A
OK
No
Yes
Check gears, thrust rod, actuator body, motor
Change
as necessary
Check gears, thrust rod, actuator body, motor
Change
as necessary
Change as necessary
Actuator OK.
End of test
D3731-1
Figure 15. Tiller Drive Actuator GP test flowchart
ST4000+ Autopilots Service Manual 83115-1 25
5.2 Disassembly/assembly
ST4000+ Autopilots
Figure 16. Tiller Drive Actuator GP exploded view
26 ST4000+ Autopilots Service Manual 83115-1
Chapter 5. Tiller Drive Actuator GP
8
9
10
11
12
6
7
4
5
Tiller Drive Actuator GP spare parts list
The item numbers refer to Figure 16: Tiller drive actuator GP exploded view
Item Spare Description
Drive module
ST4000+ GP kit, incuding
Planet gear (x4)
Shim
‘O’ ring (x3)
Annulus
Motor
Cable tie
Motor spacer
Motor sleeve
End cap assembly
Part No.
Q086
W003
Comments
Complete drive unit
Serves as an upgrade conversion kit for the
ST4000+ tiller drive actuator.
ST4000+ Autopilots Service Manual 83115-1 27
28 ST4000+ Autopilots Service Manual 83115-1
ST4000+ Autopilots
ST4000+ Autopilots
ST4000+ Autopilots Service Manual 83115-1
Raytheon Marine Company
676 Island Pond Road
Manchester
New Hampshire 03109-5420
Tel: (001 603) 647 7530
Fax: (001 603) 634 4756
ST4000+ Autopilots Service Manual 83115-1
Raytheon Marine Europe Limited
Anchorage Park, Portsmouth
Hampshire PO3 5TD
Tel: (01705) 693611
Fax: (01705) 694642 http: //www.raytheon.com
ST4000+ Autopilots
