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Autohelm St4000 Manual



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ST4000 Autopilots 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 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 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 Diagram 5 PCB Layout 6 PCB Component list 7Chapter 2 Fluxgate Compass Transducer 9 21 Functional test 9 22 Magnetic deviation 9 23 10 Fluxgate Compass spare parts list 10Chapter 3 Wheel Drive Actuator 11 31 Wheel Drive Actuator test 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 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 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 23Chapter 5Tiller Drive Actuator GP 25 51 Tiller Drive Actuator GP test 25 52 26 Tiller Drive Actuator GP spare parts list 27ST4000 Autopilots Service Manual 831151Chapter 1 ST4000 Control HeadChapter 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 instrumentPCB 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 16 152 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 ST4000ST5000 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 illustrated 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 0V4 ST4000 Autopilots Service Manual 831151Chapter 1 ST4000 Control HeadCircuit Diagram D37231Figure 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 Layout6 ST4000 Autopilots Service Manual 831151Chapter 1 ST4000 Control Head PCB Component list Taken from Drawing No 4376001 Issue P Date 031097 D37241 ST4000 Autopilots Service Manual 831151 7 ST4000 Autopilots8 ST4000 Autopilots Service Manual 831151Chapter 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 linearisation procedure is carried out Any further deviation introduced after linearisation 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 position ST4000 Autopilots Service Manual 831151 9 ST4000 Autopilots23 1 2 4 7 8 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 D37261Figure 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 subassembly10 ST4000 Autopilots Service Manual 831151Chapter 3 Wheel Drive 3 Wheel Drive Actuator 31 Wheel Drive Actuator test Carry out the passive and active tests detailed in Figure 6 FuseCB 12A Switch PSU 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 OK components moves and current is less Yes than 2A Check gears belt Rotate drive ring by hand No rollers belt OK with clutch disengaged tension eccentric Yes drive lever motor Check gears Changeadjust 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 No OK 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 Yes No Check gears belt OK No rollers belt OK Yes tension eccentric Yes drive lever motor Check motor Changeadjust as necessary Change as necessary Restrain drive ring rotation until 65A is obtained Check that belt does not slip No OK Yes 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 3712 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 preassembled 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 2714 ST4000 Autopilots Service Manual 831151Chapter 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 disassembly 8 5 5 5 5 4 4 4 7 3 5 5 4 5 4 2 6 1 7 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 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 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 slackest16 ST4000 Autopilots Service Manual 831151Chapter 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 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 overtightened 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 SW1 FS1 IC1 LM396K 15A R1 121R Red ZO78 Brown Z077 12V BATTERY ACTUATOR Blue D1 C1 C2 R2 C3 C4 R3 MR752 4700uF 47uF 845R 22uF 47uF 1KO D23841 Figure 9 Motor drive box circuit diagram18 ST4000 Autopilots Service Manual 831151Chapter 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 Autopilots20 ST4000 Autopilots Service Manual 831151Chapter 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 flowchart Blue FuseCB 1 12A 2 3 Brown Switch Blue Brown Actuator deck plug PSU 12V 15A D23941 Figure 10Tiller Drive Actuator test connections Start Connect power supply Visually inspect unit as in Figure 10 No Change damaged OK 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 OK 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 Yes No OK Check gears No thrust rod OK 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 2 6 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 the22 ST4000 Autopilots Service Manual 831151 annulus 7 when screwing into the thrust tube 2 Figure 12 Tiller Drive Actuator exploded view 42 1 14 Note A 13 12 11 6 End view of Annulus 7 15 10 9 ST4000 ST4000 GP 13mm diameter 16mm diameter 8 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 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 8 3 9 9 End cap assembly D23971 Figure 13 Tiller Drive Actuator GP conversion kit W003 ST4000 Autopilots Service Manual 831151 23 ST4000 Autopilots24 ST4000 Autopilots Service Manual 831151Chapter 5 Tiller Drive Actuator GPChapter 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 flowchart Blue FuseCB 1 12A 2 3 Brown Switch Blue Brown Actuator deck plug PSU 12V 15A D23981 Figure 14Tiller Drive Actuator GP test connections Start Connect power supply Visually inspect unit as in Figure 10 No Change damaged OK 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 OK 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 Yes No OK Check gears No thrust rod OK 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 2 A Ensure cable clamp nut 15 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 gear annulus 4 x426 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 15 Note A 14 13 12 6 End view of Annulus 7 16 11 10 ST4000 ST4000 GP 13mm diameter 16mm diameter 9 8 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 Autopilots28 ST4000 Autopilots Service Manual 831151ST4000 Autopilots ST4000 Autopilots Service Manual 831151 ST4000 Marine Company Raytheon Marine Europe Limited676 Island Pond Road Anchorage Park Hampshire PO3 5TDNew Hampshire 031095420 Tel 01705 693611Tel 001 603 647 7530 Fax 01705 694642Fax 001 603 634 4756 http Autopilots Service Manual 831151

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