Page 1 Autohelm Autohelm Autohelm Autohelm Autohelm Inboard Autopilots (ST6000 and ST7000 systems) Service Manual Tom Green 11/02 SeaTalk Service Manual...
Page 2 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 3: Table Of Contents
1. Service Procedures 2. Technical Information 1. Service Procedures ST6000 System 2. Technical Information 1. Service Procedures ST6000 Control Unit (Z124) 2. Technical Information 1. Service Procedures ST6000 Course Computer (Z123) 2. Technical Information Type CR Interface Box (Z085) 1. Service Procedures 2.
Page 5: Service Procedures
Autohelm Autohelm Autohelm Autohelm ST7000 Basic System 1. Service Procedures SeaTalk Service Manual...
Page 6: Table Of Contents
Autohelm Autohelm Autohelm Autohelm ST7000 System Index Page 1. Introduction 2. System Description. 3. Operating/Calibration Instructions. 3.1 Operation 3.2 Operating Hints 3.3 Additional Information for Sailing Vessels 3.4 Calibration 3.5 Fluxgate Compass - Automatic Deviation Correction 4. Common System Problems. 5.
Page 7: Introduction
Autohelm Autohelm Autohelm Autohelm 1. Introduction The ST7000 system section of this manual contains full system operating instructions and service procedures for the installed autopilot. Further indepth diagnostics are available for each module in the relevant product sections. 2. System Description The ST7000 is a modular autopilot system that can be built up to match the individual requirements of all vessels.
Page 8: Operating/Calibration Instructions
Autohelm Autohelm Autohelm Autohelm 3. Operating/Calibration instructions 3.1 Operation Automatic Heading Auto Push to engage automatic steering and maintain current heading. Previous Automatic Heading Push and hold down for 1 second to return to previous automatic heading. (Display returns to Auto after 10 seconds).
Page 9 Autohelm Autohelm Autohelm Autohelm Response • Response Level Adjustment (see Operating Hints) Response Level Push to increase ( ▲ ) or decrease ( ▼ ) response level. To display response level without changing it push both Response keys together briefly. •...
Page 10 Autohelm Autohelm Autohelm Autohelm Display Key Sequence Watch Alarm (not available in Standby) • To select Watch alarm push Display repeatedly until Watch appears. • Cross Track Error* The 4 minute timer is now running: —After 3 minutes ‘Watch’ flashes on all control units.
Page 11 Autohelm Autohelm Autohelm Autohelm Warning Messages • Off Course Alarm —Sounds if the cross track error exceeds 0.30n.m. Note: Push Standby to silence an alarm —Sounds if the vessel deviates from the and select Standby mode. automatic heading by more than the selected amount for over 20 seconds.
Page 12: Operating Hints
Autohelm Autohelm Autohelm Autohelm 3.2 Operating Hints assume the new automatic heading, and only settle onto course when the Automatic Response Level Adjustment Trim has been fully established. The ST7000 has three response levels It is recommended the following procedure which enable tighter course keeping to be is adopted for large course changes.
Page 13 Autohelm Autohelm Autohelm Autohelm Unsatisfactory Steering Performance Failure to Disengage If the 5T7000 has been installed and set up The mechanical drive actuators of the in accordance with the instructions in the ST7000 are designed to ‘Fail Safe’ — When Installation Manual it will provide excellent power is disconnected the drive unit will steering performance over a wide range of...
Page 14: Additional Information For Sailing Vessels
Autohelm Autohelm Autohelm Autohelm 3.3 Additional Information for Sailing Vessels Autotack The ST7000 has a built in Autotack function which will turn the vessel through 100°. This operates in both compass and vane modes as follows:- Vane Push +1 and -1 -10 keys together to initiate a tack turning to Starboard.
Page 15 Autohelm Autohelm Autohelm Autohelm Wind Change Alarm Using Wind Trim Wind Trim uses the fluxgate compass as It is important to understand that “Wind the primary heading reference and Trim” prevents over-reaction to gusts or automatically adjusts the compass heading sudden wind shifts.
Page 16: Calibration
Autohelm Autohelm Autohelm Autohelm 3.4 Calibration Selecting and Exiting from Calibration Recommended Settings Mode As supplied the ST7000 can be switched on To select calibration mode:- and tested safely without any adjustments to • Push Standby. the factory calibration settings. •...
Page 17 Autohelm Autohelm Autohelm Autohelm • Rudder Angle Limit, 15 to 40 (see 3.6). Adjusting Calibration In calibration mode, the display button is used to scroll through the menu. The displayed value is adjusted using the Response buttons (hold button down for fast scroll).
Page 18 Autohelm Autohelm Autohelm Autohelm • Off-Course Alarm, 15 to 40° angle. • Manual Steering Lever Type. 1 = Proportional (Follow up) 2 = Bang Bang (Drive left, Drive right) • Automatic Trim, (see 5.4). • Autopilot Drive Unit Type. 1 = on 0 = off 1 = Future Use 2 = Future Use...
Page 19 Autohelm Autohelm Autohelm Autohelm 3. 5 Automatic Deviation Correction The ST7000 will correct the fluxgate compass for any deviating magnetic fields. This should be carried out in calm conditions preferably in flat water. • To select compass adjust Push and hold Standby for 1 second. •...
Page 20: Common System Problems
Autohelm Autohelm Autohelm Autohelm 4. Common System Problems Problem Cause. Solution. System displays ‘Manual’ Early systems had poor colour Reverse Blue and Green mode instead of ‘Standby’ definition on terminal boards. connections on Fluxgate. on power up. Blue and Green connections to the Fluxgate are reversed.
Page 21: Track Control Interfacing
Autohelm Autohelm Autohelm Autohelm 5. Track Control interfacing. In most cases interfacing the ST7000 to either a GPS, Decca, Loran or Satellite Navigation system is a simple and straight forward task, so long as the requirements set out in section 6 of the installation manual are met. There are however a few exceptions: 5.1 Inverted Data.
Page 22 Autohelm Autohelm Autohelm Autohelm 5.4 Autohelm 7000 N.M.E.A 0183 Data input Format. The 7000 must receive Cross Track Error data at least once every 30 seconds. If a display of Waypoint bearing and distance is required then this information must be received at least once every 30 seconds.
Page 23: Special Functions
Autohelm Autohelm Autohelm Autohelm 6. Special functions. 6.1 Display of Software Version It is possible to display the version number of both Course Computer and Control Unit software installed in a particular system. This is achieved by pressing both the +10 and -10 keys together for 2 seconds and releasing.
Page 24: Service Visit To A Vessel
Autohelm Autohelm Autohelm Autohelm 7. Service visit to a vessel. When a service visit to a vessel is made the most common fault en-countered is likely to be poor connections or inadequate power supplies. These should be thoroughly checked before the Service visit diagnostic procedure is carried out. When trying to locate a fault it should be remembered that most failures will occur in the Course Computer with the Control Units as the next most likely.
Page 25 Autohelm Autohelm Autohelm Autohelm 7.1 Service Visit - Diagnostic Procedure On arrival check for bad connections (corroded connector pins, loose connectors etc) and for inadequate power supplies. If the system still exhibits a fault, then use the diagnostic procedure outlined below. Once the faulty module has been detected refer to the relevant Product Section for detailed service information.
Page 26 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 27 Autohelm Autohelm Autohelm Autohelm Z082 Control Unit 1. Service Procedures SeaTalk Service Manual...
Page 28 Autohelm Autohelm Autohelm Autohelm Contents Page 1. Description 2. Dismantling 3. Re-assembly 4. Display Contrast Adjustment 5. Functional Test 6. Product History 7. Software History 8. Spares Numbers Illustrations Fig. 1. Z082 Control Unit General Assembly Fig. 2. LCD/Diffuser Assembly SeaTalk Service Manual...
Page 29 Autohelm Autohelm Autohelm Autohelm 1. Description The Z082 Control Unit is SeaTalk compatible and consists of a single PCB built using surface mount technology. It can be used with both 12V and 24V SeaTalk Course Computers. The unit can also be functionally tested without the use of special equipment using the procedure outlined in figure 3.
Page 30 Autohelm Autohelm Autohelm Autohelm 5. When finally refitting the cover to the facia ensure that the cover is in the correct position relative to the cables and pull the cables back through the grommets as the cover is lowered onto the facia. Wipe off any excess grease from the cable sheaths. 6.
Page 31 Autohelm Autohelm Autohelm Autohelm Control Unit General Assembly (Z082) Fig. 1. SeaTalk Service Manual...
Page 32 Autohelm Autohelm Autohelm Autohelm LCD Display Assembly Fig. 2. SeaTalk Service Manual...
Page 33 Autohelm Autohelm Autohelm Autohelm 5. Functional Test SeaTalk Service Manual...
Page 34 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 35 Autohelm Autohelm Autohelm Autohelm 6. Product History (Z082) Change Serial Number Comments Production Start 290001 When used with a Track Com- Track Compatibility 690075 patible Course Computer White Back Light diffuser 890007 introduction Protective Cover supplied 100001 with unit SeaTalk Cable supplied 300056 with unit 7.
Page 36 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 37 Autohelm Autohelm Autohelm Autohelm 2. Technical Information Contents Page Circuit description 1.1 Power Supply 1.2 Microprocessor and Program Memory 1.3 LCD and Display Driver 1.4 Negative Rail Generator 1.5 N.M.E.A. Interface 1.6 Seatalk Bus Transmit and Receive 1.7 Keypad Operation 1.8 Buzzer Operation 1.9 Illumination Drive Illustrations...
Page 38 Autohelm Autohelm Autohelm Autohelm 1. Control Unit PCB Circuit Description Circuit Diagram Fig. 1. PCB Assembly/Parts List Fig. 2. 1.1 Power Supply Incoming power is routed to the PCB via PL1 and SKT1. D4 and D20 protect against reverse connection of the supply. IC1 is a 5V regulator and can also reset the microprocessor, via TR1, should the supply voltage fall below approximately 6V.
Page 39 Autohelm Autohelm Autohelm Autohelm 1.7. Keypad Operation The 10 button key pad is configured in a 4*3 matrix and connected to the microprocessor P1.0 and P1.6 (pins 2 to 8). Each key is diode isolated to enable multiple key presses to be decoded. 1.8.
Page 40 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 41 Autohelm Autohelm Autohelm Autohelm Fig. 1. Z082 Control Unit Circuit Diagram ISS C SeaTalk Service Manual...
Page 42 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 43 Autohelm Autohelm Autohelm Autohelm NOTES 1. ALL SURFACE MOUNT CAPACITORS AND RESISTORS TO HAVE NICKEL BARRIER SOLDER PLATED TERMINATIONS 2. ITEM 4 (15036) TO BE SANDWICHED BETWEEN ITEM 5 (15039) AND PCB TO INSULATE HEATSINK FROM 5V TRACK CONNECTED TO IC 1 (PIN 2) 3.
Page 44 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 45 Autohelm Autohelm Autohelm Autohelm Z084 Course Computer (24V) & Z083 Course Computer (12V) 1. Service Procedures SeaTalk Service Manual...
Page 46 Autohelm Autohelm Autohelm Autohelm Contents Page 1. Description 2. Dismantling 3. Re-assembly 4. Functional Test 4.1 Bench Test (stage 1) 4.2 Bench Test (stage 2) 4.3 Bench Test (stage 3) 5. Product History 6. Software History 7. Spares Numbers Illustrations Fig.
Page 47 Autohelm Autohelm Autohelm Autohelm 1. Description The ST7000 course computer is SeaTalk compatible and consists of 2 PCB's, a course computer and power amplifier. The course computer, which is built using surface mount technology, contains a microprocessor and various analogue interface circuitry.
Page 48 Autohelm Autohelm Autohelm Autohelm 3. Re-assembly In all cases re-assembly is a reversal of the dismantling procedures above, but note;- 1. Ensure correct orientation of power amp PCB loom when reconnecting to the computer PCB. Ensure a loom clip is fitted to the ribbon cable connector. 2.
Page 49 Autohelm Autohelm Autohelm Autohelm ST7000 Course Computer General Assembly Z083-12V and Z084-24V Fig. 1. SeaTalk Service Manual...
Page 50 Autohelm Autohelm Autohelm Autohelm ST7000 Course Computer (Z083, Z084) - Power Amp PCB Assembly Fig. 2. SeaTalk Service Manual...
Page 51 Autohelm Autohelm Autohelm Autohelm 4. Functional Test The Course Computer can be functionally checked by using the following procedure. Pre checked equipment required;- SeaTalk Control Unit (Z082) Fluxgate Compass (Z105) Pushpit Vane Transducer (Z087) Rudder Reference Transducer (Z060) Terminal PCB (Q006) Terminal Block Multimeter Motor for Z083 (12V) (N002)
Page 52 Autohelm Autohelm Autohelm Autohelm 4.1 Course Computer Bench Testing (Stage 1) SeaTalk Service Manual...
Page 53 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 54 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 55 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 56 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 57 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 58 Autohelm Autohelm Autohelm Autohelm 4.2 Course Computer Bench Testing (Stage 2) 1. Proceeding from stage 1 bench testing, remove the four screws retaining the computer PCB cover assembly and slide the PCB clear of the extrusion. Do not disconnect the loom. SeaTalk Service Manual...
Page 59 Autohelm Autohelm Autohelm Autohelm 4.3 Course Computer Bench Testing (Stage 3) Proceeding from stage 1 bench testing, remove 4 screws retaining the computer PCB cover assembly and slide the PCB clear of the extrusion. Do not disconnect the loom. SeaTalk Service Manual...
Page 60 Autohelm Autohelm Autohelm Autohelm 5. Product History Course Computer (Z083 & Z084) Change Serial Number Comments Production Start 290001 Track Function Introduced 590206 Must be used in conjunction with a Control Unit capable of supporting the Track function Capacitor 'C6' (100µf) fitted to 890040 Cures occasional system reset to power amplifier board...
Page 61 Autohelm Autohelm Autohelm Autohelm 2. Technical Information Contents Page 1. Circuit Description (Course Computer PCB) 1.1 Power Supplies 1 .2 Microprocessor and Program Memory 1.3 Analogue to Digital Converter 1.4 Clutch Drive 1.5 SeaTalk Bus Transmit and Receive 1.6 Fluxgate Drive 1.7E2prom 1 .8 Supply Voltage Monitor 1.9 Alarm Drive...
Page 62 Autohelm Autohelm Autohelm Autohelm 1. Course Computer PCB Circuit Description;- Circuit diagram Fig. 1. PCB assembly/parts list Fig. 2. 1.1. Power Supplies Incoming power is routed to the PCB via the 'D' connector plug PL1. VI provides suppression against any voltage spikes present on the incoming DC supply whilst D6 protects against reverse connection of the supply.
Page 63 Autohelm Autohelm Autohelm Autohelm 1.4. Clutch Drive TR10, 11 and 12 switch a nominal 12V onto the actuator clutch whenever pin 15 of the microprocessor (IC2) is low at 0V. 1.5. SeaTalk Bus Transmit and Receive SeaTalk transmit and receive circuitry consists of TR1, 2, 3,4, 5, 18 and 19 and their associated components.
Page 64 Autohelm Autohelm Autohelm Autohelm 2.2. Reverse Connection Protection TR1 and TR2 along with RL1,2 and 3 ensure that external misconnection of Heavy duty V+, Heavy duty 0V and M1 and M2 will not damage the unit. 2.3. Bridge Amplifier TR6, 7,8 and 9 form a bridge amplifier to control the actuator motor. Four modes of operation are possible, each selectable with a binary code on drive A and drive B.
Page 65 Autohelm Autohelm Autohelm Autohelm Fig. 1. ST7000 (Z083 and Z084) Course Computer Circuit Diagram ISS B SeaTalk Service Manual...
Page 66 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 67 Autohelm Autohelm Autohelm Autohelm 91063K9 WCR 1206 3K9 5X . 125W 910333K WCR 1206 33K 1% .I25W R30.43 940093061 EEPROM 16 x 16 M9306M 1 (SURFACE MOUNT) 91036K8 WCR 1206 6K8 1% .125W R37 38 910310K WCR 1206 10K 1% .125W R39.40.49 940374373 LATCH 74HC373...
Page 68 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 69 Autohelm Autohelm Autohelm Autohelm Z083 Power Amplifier Circuit Diagram 12V Z084 Power Amplifier Circuit Diagram 24V Fig. 3. SeaTalk Service Manual...
Page 70 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 71 Autohelm Autohelm Autohelm Autohelm 03031 CAPACITOR ELECTROLYTIC 100uF +80% -20% 25VMIN C6 01083 RESISTOR C’FILM 3K9 .25W ±5% 15057 RELAY T90.30A RL1, 2, 3 13024 LINK 05019 TRANSISTOR PNP BC 327 TR4, 5, 10, 11 05018 TRANSISTORS BC 337 TR1, 2, 3, 12 03036 CAPACITOR TANTALUM 1µF ±20% 25vmin C3, 20...
Page 72 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 73 Autohelm Autohelm Autohelm Autohelm 15057 RELAY T90 30A RL1, 2, 3 05019 TRANSISTOR PNP BC 327 T4, 5, 10, 11 05018 TRANSISTOR NPN BC 337 T1, 2, 3, 12, 13 03036 CAPACITOR TANTALUM 1µF±20% 25vmin C3, 20 03031 CAPACITOR ELECTROLYTIC 100% 525vmin C6 03023 CAPACITOR ELECTROLYTIC 1000µF 60vmin C5...
Page 74 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 75 Autohelm Autohelm Autohelm Autohelm Colour code White Green Yellow Blue Brown Fig- 6. Connector PCB Circuit Diagram (Z083f Z084) ISS A SeaTalk Service Manual...
Page 76 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 77 Autohelm Autohelm Autohelm Autohelm 07163 TERMINAL BLOCK 07119 'D' CONNECTOR 3015-029 PCB DETAIL ITEMS DR'G/PART N* DESCRIPTION Fig. 7. Connector PCB General Assembly ISS C SeaTalk Service Manual...
Page 78 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 79 Autohelm Autohelm Autohelm Autohelm ST6000 System 1. Service Procedures SeaTalk Service Manual...
Page 80 Autohelm Autohelm Autohelm Autohelm Contents Page Introduction System Description Operating / Calibration Instructions Operation Addition information for sailing vessels Operating Hints Calibration 3.4.1 Adjusting Calibration 3.4.2 Display Contrast Adjustment Fluxgate Compass – Automatic Deviation Correction Common system problems Track control interfacing Inverted data Conversion of units Alarm messages...
Page 81 2. Systems description The ST6000 is a modular Seatalk compatible autopilot system that can be built up to match the individual requirements of most vessels and steering systems. The ST6000 course computer can be used with all Seatalk compatible control units...
Page 82 Autohelm Autohelm Autohelm Autohelm 3. Operating/Calibration Instructions 3.1 Operation Automatic Heading Auto Push to engage automatic steering and maintain current heading. Previous Automatic Heading Push and hold down for 1 second to return to previous automatic heading. (Display returns Auto after seconds).
Page 83 Autohelm Autohelm Autohelm Autohelm Response • Response Level Adjustment (see Operating Hints) Response Level Push to increase (▲) or decrease (▼) response level. To display response level without changing it push both Response keys together briefly. • Rudder Gain Adjustment (see Operating Hints) Rudder Gain Level Push and hold down for 1 second both Response keys together to...
Page 84 Autohelm Autohelm Autohelm Autohelm Display Key Sequence Auto Mode • Main Display The Display pushbutton is used to cycle through additional information menus. These menus depend on the autopilot mode and if navigation information is available. Standby Mode • Main Display •...
Page 85 Autohelm Autohelm Autohelm Autohelm Track Mode Navigation Displays • Main Display With the Navigation Receiver operating in waypoint mode, the following information can be displayed (provided that the Navigation Receiver transmits the appropriate information - see Installation Handbook). • Cross Track Error •...
Page 86 Autohelm Autohelm Autohelm Autohelm Watch Alarm Warning Messages (not available in Standby) • Engage the Autopilot in Auto Track • Off Course Alarm Windvane mode. • To select Watch alarm push Display repeatedly until Watch appears. — Sounds if the vessel deviates from the automatic heading by more than the The 4 minute timer is now running:- selected amount for over 20 seconds.
Page 87 Autohelm Autohelm Autohelm Autohelm — Sounds when the target waypoint number changes. The displayed bearing is to the new waypoint. PORT or STBD indicates in which direction the autopilot will turn onto the new waypoint bearing. Push Track to silence the alarm and automatically steer onto the new bearing to waypoint.
Page 88 Autohelm Autohelm Autohelm 3.2 Additional information for Sailing Vessels Autotack The ST6000 has a built in Autotack function which will turn the vessel through 100°. This operates in both compass and vane modes as follows:- Vane Push +1 and +10 keys together to initiate a tack turning to Starboard.
Page 89 Autohelm Autohelm Autohelm Autohelm Wind Change Alarm Using Wind Trim Wind Trim uses the fluxgate compass as It is important to understand that "Wind the primary heading reference and Trim" prevents over-reaction to gusts or automatically adjusts the compass heading sudden wind shifts.
Page 90 (see Page 9). When the headings in the higher latitudes of the northern alarm is sounding the ST6000 will maintain the hemisphere (and conversely southerly headings current heading and automatic track control is in the southern hemisphere).
Page 91 Two options are available to control this:- Unsatisfactory Steering Performance • Manual (Low speed and displacement If the ST6000 has been installed and set up craft) The rudder gain control may change in accordance with the instructions in the by one level when going from northerly to...
Page 92 Excessive force is not required and will The mechanical drive actuators of the not reduce this delay. ST6000 are designed to fail Safe1 - When With the ST6000 in Auto and clear of power is disconnected the drive unit will...
Page 93 Autohelm 3.4 Calibration Recommended Settings Selecting and Exiting from Calibration Mode As supplied the ST6000 can be switched on To select calibration mode:- • Push Standby. and tested safely without any adjustments • Push and hold down for 2 seconds, to the factory calibration settings.
Page 94 Autohelm Autohelm Autohelm Autohelm • Rate of Turn Limit, 5° to 20°/sec. 3.4.1 Adjusting Calibration In calibration mode, the Display button is used to scroll through the menu. The displayed value is adjusted using the Response buttons (hold button down for fast scroll).
Page 95 Autohelm Autohelm Autohelm Autohelm Autopilot Drive Unit Type. and in the Southern Hemisphere. 1 = Future Use • Auto Release (see 3.8). 2 = Future Use 3 = Mechanical with Rudder Reference 4 = Hydraulic with Rudder Reference 0 = OFF 1 = ON •...
Page 96 Autohelm 3.5 Automatic Deviation Correction The ST6000 will correct the fluxgate compass for operation in most deviating magnetic fields. This should be carried out in calm conditions preferably in flat water. • To select compass adjust Push and hold Standby for 1 second.
Page 97 “ 5. Track control interfacing In most cases interfacing the ST6000 to either a GPS, Decca, Loran or Satellite Navigation system is a simple and straight forward task so long as the requirements set out in section 6 of the installation manual are met. There are however a few exceptions.
Page 98 Autohelm Autohelm Autohelm message indicates the ST6000 is receiving data recognised as NMEA but has an invalid flag set. This is normally due to the receiver having a low signal strength or a high noise figure. 5.4 Autohelm 6000 NMEA 0183 data input format The 6000 must receive Cross Track Error data at least once every 30 seconds.
Page 99 6.2 Permanent Watch Alarm Mode The ST6000 autopilot can be set up with a permanent watch alarm mode, as required by the Sea Fish Industry authority (SFIA). It must be stressed that the selection of this mode is permanent and can only be reversed by returning the course computer to Nautech.
Page 100 Autohelm Autohelm Autohelm Autohelm 7. Service visit to a vessel When a service visit to a vessel is made the most common fault encountered is likely to be poor connections or inadequate power supplies. These should be thoroughly checked before the service visit diagnostic procedure is carried out. When trying to locate a fault it should be remembered that most failures will occur in the Course Computer with the Control Units as the next most likely.
Page 101 Autohelm Autohelm Autohelm Autohelm 7.1 Service Visit - Diagnostic Procedure On arrival check for bad connections and for inadequate power supplies. If the system still exhibits a fault, then use the diagnostic procedure outlined below. SeaTalk Service Manual...
Page 102 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 103 Autohelm Autohelm Autohelm Autohelm ST6000 Control Unit (Z124) 1. Service Procedures 2. Technical Information SeaTalk Service Manual...
Page 104 Autohelm Autohelm Autohelm Autohelm 1. Service Procedures Contents Page 1. Description 2. Dismantling 3. Reassembly 4. Display Contrast Adjustment 5. Functional Test 6. Product History 7. Software History 8. Spares Numbers Illustrations Fig. 1. General assembly SeaTalk Service Manual...
Page 105 Autohelm Autohelm Autohelm Autohelm 1. Description The Z124 control unit is Seatalk compatible and consists of a single PCB built using surface mount technology. The unit can be functionally tested (figure 3) without the use of special equipment other than a seatalk cable with a seatalk plug at one end and bared cores at the other.
Page 106 Autohelm Autohelm Autohelm Autohelm 5. Pull the loom assemblies back through the grommets when lowering the cover to ensure that the cables do not bunch up inside the cover and foul the PCB on re- assembly. 6. Refit the cover. 7.
Page 107 Autohelm Autohelm Autohelm Autohelm Fig. 1. SeaTalk Service Manual...
Page 108 Autohelm Autohelm Autohelm Autohelm 4. Z124 Control Unit Functional Test SeaTalk Service Manual...
Page 109 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 110 Autohelm Autohelm Autohelm Autohelm 5. Product History - Control Unit (2124) Change Serial number Comments 030001 production start 6. Software History - Control Unit (Z124) Version Change Serial No Product launch 030001 7. Spares numbers - Control unit (Z124) Item Catalogue no Comments Double skin mounting kit...
Page 111 Autohelm Autohelm Autohelm Autohelm 2. Technical Information Contents Page 1. Circuit Description 1.1 Power Supply 1.2 Microprocessor and Program Memory 1.3 LCD and Display Driver 1.4 Negative Rail Generator 1. 5 N.M.E.A Interface 1.6 Seatalk Bus Transmit and receive. 1.7 Keypad Operation 1.8 Buzzer Operation 1.9 Illumination Drive Illustrations...
Page 112 Autohelm Autohelm Autohelm Autohelm 1. Control Unit PCB Circuit description Fig. 4. Circuit Diagram Fig. 5. PCB Assembly/Parts List 1.1 Power supply Incoming power is routed to the PCB via PL1 and SKT1. Dl and D2 protect against reverse connection of the supply. IC1 is a 5v regulator and can also reset the microprocessor, via TR1, should the supply voltage fall below 6V.
Page 113 Autohelm Autohelm Autohelm Autohelm Each key is read in turn when the relevant channel is selected via pins p3.5 and p3.6. 1.8 Buzzer Operation TR2 and TR3 are configured as an astable multivibrator with a nominal frequency of 2.7kHz. TR7 and 8 are used to switch the buzzer with TR7 acting as an inverter to turn the buzzer off during a microprocessor reset.
Page 114 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 115 Autohelm Autohelm Autohelm Autohelm ST6000 (Z124) Control Unit Circuit Diagram ISS E SeaTalk Service Manual...
Page 116 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 117 CONTACT CLICKER OOK-73470 S1,S2,S3,S4,S5,S6,S7,S8,S9,S10 26006 RIVSCREW 1712-3507 (AVDEL) 15039 HEATSINK REDPOINT TV58 07164 28 PIN SOCKET 3015-025 6000 CONTROL UNIT PCB DETAIL 3010-036 CLICKER SEAL ITEMS DR' G /PART N* DESCRIPTION ST6000 (Z124) Control Unit PCB Assembly SeaTalk Service Manual...
Page 118 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 119 Autohelm Autohelm Autohelm Autohelm ST6000 Course Computer (Z123) 1. Service Procedures SeaTalk Service Manual...
Page 120 Autohelm Autohelm Autohelm Autohelm Contents Page 1. Description 2. Disassembly 3. Reassembly 4 Functional Test 5. Product History 6. Software History 7. Spares Numbers Illustrations Fig. 1 . General Assembly SeaTalk Service Manual...
Page 121 Autohelm Autohelm 1. Description The ST6000 course computer is SeaTalk compatible and consists of a single PCB containing both the course computer and power amplifier circuitry. It is built using surface mount technology and available for 12v operation only. Note: If the course computer or its PCB are replaced, calibration values previously altered from the factory settings will require resetting.
Page 122 Autohelm Autohelm Autohelm Autohelm Course Computers (Z083, Z084) - General Assembly SeaTalk Service Manual...
Page 123 Autohelm Autohelm Autohelm Autohelm 4. Functional Test The course computer can be functionally checked as follows; Pre-checked equipment required: SeaTalk Control Unit (Z124) Fluxgate Compass (Z105 or Z130) Pushpit vane transducer (Z087) Rudder Reference Transducer (Z060) Terminal PCB (Q030) Terminal Block Multimeter Motor (small AH1000 type) (M080)
Page 124 Autohelm Autohelm Autohelm Autohelm 4.1 Course Computer Bench Testing (Stage 1) SeaTalk Service Manual...
Page 125 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 126 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 127 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 128 Autohelm Autohelm Autohelm Autohelm 5. Product History - Course Computer (ST6000) Change Serial No Comments Production start 030001 6. Software History - Course Computer (ST6000) Version Change Serial No Product launch 030001 Improved Trim function 500571 7. Spares numbers - Course Computer (ST6000)
Page 129 Autohelm Autohelm Autohelm Autohelm 2. Technical Information Contents Page 1. Circuit Description 1.1 Power Supply 1.2 Microprocessor and program memory 1.3 Power Amplifier 1.4 Analogue to Digital converter 1.5 Clutch Drive 1.6 Seatalk Bus Transmit and Receive 1.7 Fluxgate Drive 1.8 E2 Prom 1.9 Supply Voltage Monitor SeaTalk Service Manual...
Page 130 Autohelm Autohelm Autohelm Autohelm 1. ST 6000 Course Computer Circuit Description Circuit diagram Fig. 1. PCB Assembly/Parts List Fig. 2 1.1 Power Supply Incoming power is routed to the PCB. via the 'D' connector socket SKI. VI provides suppression against any voltage spikes present on the incoming DC supply whilst D15 protects against accidental reverse connection of the supply.
Page 131 Autohelm Autohelm Autohelm Autohelm Channel 4 Feedback 1 (FB1) Channel 5 Feedback 2 (FB2) Channel 6 Not used Channel 7 Not used Channel 0 Not used Channel 1 Not used Channel 2 Rudder Reference (RUDDER) Channel 3 Supply Monitor (INPUT VOLTS) Channel 4 Not used Channel 5...
Page 132 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 133 Autohelm Autohelm Autohelm Autohelm ST6000 (Z123) Course Computer Circuit Diagram ISS A SeaTalk Service Manual...
Page 134 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 135 VARISTOR ZNR TYPE D ERZC07DK270 V1 3022-003 HEATSINK 3010-073 CUSTOM SIL PAD 07164 1C SOCKET (28 PIN) 07119 'D' CONNECTOR 25 WAY (FEMALE) SK1 3015-040 ST6000 COMPUTER PCB DETAIL ITEMS DRG/PART N° DESCRIPTION ST6000 (Z123) Course Computer PCB Assembly ISS D SeaTalk Service Manual...
Page 136 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 137 Autohelm 07212 TERMINAL BLOCK (2 WAY) TB5,6 07108 TERMINAL BLOCK (3 WAY) TB2,4 07109 TERMINAL BLOCK (4 WAY) TB1,3 07118 'D’ CONNECTOR 3015-041 PCB DETAIL ITEMS DR'G/PART N° Q'T'Y DESCRIPTION ST6000 (Z123) Terminal PCB Assembly ISS A1 SeaTalk Service Manual...
Page 138 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 139 Autohelm Autohelm Autohelm Autohelm Type CR Interface Box (Z085) 1. Service Procedures SeaTalk Service Manual...
Page 140 Autohelm Autohelm Autohelm Autohelm Contents Page 1. Description 2. Functional Test 3. Operation non Autohelm power packs SeaTalk Service Manual...
Page 141 Autohelm Autohelm Autohelm Autohelm Service Procedures Type CR Interface Box (Z085) 1. Description All type CR systems are driven with a standard course computer and terminal board which interfaces to a type CR interface box (Z085). The same interface box is used for both 12V and 24V systems and can be functionally tested by using the following procedure.
Page 142 Autohelm Autohelm Autohelm Autohelm 3. Operation with non Autohelm Power Packs If the Type CR Interface Box is to be used to drive non-Autohelm power packs the following points should be noted: 1. Solenoid pull-in voltage <8V (16V for 24V systems). 2.
Page 143 Autohelm Autohelm Autohelm Autohelm 2. Technical Information Contents Page 1. Circuit Description Illustrations Fig. 1. Circuit Diagram Fig. 2. PCB Assembly Fig. 3. Parts List SeaTalk Service Manual...
Page 144 Autohelm Autohelm Autohelm Autohelm 1. Type CR Interface Box PCB Circuit Description The course computer clutch signal activates RLY1 which in turn supplies current to a bypass valve, if fitted. D1 suppresses any inductive spikes produced when the valve is switched and D2 protects against supply misconnection. Each solenoid drive is derived by connecting one side of the solenoid to a motor terminal and the other side to 0V.
Page 145 Autohelm Autohelm Autohelm Autohelm Fig. 1. Z085 Type CR Interface Box Circuit Diagram ISS B SeaTalk Service Manual...
Page 146 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 147 Autohelm Autohelm Autohelm Autohelm Fig. 2. Z085 Type CR Interface Box PCB Assembly ISS B SeaTalk Service Manual...
Page 148 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 149 Autohelm Autohelm Autohelm Autohelm 7000 Type CR Parts List Item DR'G/Part No PCB detail 3015-038 Diode MR751 D1 02031 Diode (Fast Recovery) MR850 D1 02036 PCB Connector 07-212 Relay T9030A RL1 15057 Dust Cover 15111 SeaTalk Service Manual...
Page 150 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 151 Autohelm Autohelm Autohelm Autohelm Rudder Reference Transducer (Z131) Service Procedures SeaTalk Service Manual...
Page 152 Autohelm Autohelm Autohelm Autohelm Contents Page 1. Description 2. Functional Test Illustration Fig. 1. Rudder Reference Body Assembly Fig. 2. Rudder Reference General Assembly SeaTalk Service Manual...
Page 153 Autohelm Autohelm Autohelm Autohelm 1. Description The Z131 Rudder Reference contains a single turn 5k ohm plastic potentiometer to provide the autopilot with rudder position information. When replacing, correct installation is vital if optimum steering performance is to be achieved. The Rudder Reference unit arm movement is limited to +/-60 degrees.
Page 154 Autohelm Autohelm Autohelm Autohelm Z131 Rudder Reference Body Assembly SeaTalk Service Manual...
Page 155 Autohelm Autohelm Autohelm Autohelm Z131 Rudder Reference General Assembly SeaTalk Service Manual...
Page 156 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 157 Autohelm Autohelm Autohelm Autohelm Fluxgate Compass Transducer (Z130) Service Procedures SeaTalk Service Manual...
Page 158 Autohelm Autohelm Autohelm Autohelm Contents Page 1. Description 2. Functional Test 3. Magnetic Deviation 4. Gimble Support Bracket Installation 5. Fluxgate Sensor Replacement 6. Product History 7. Spares Numbers Illustrations Fig. 1. Fluxgate General Assembly SeaTalk Service Manual...
Page 159 Autohelm Autohelm Autohelm Autohelm Fluxgate Compass Transducer (Z130) 1. Description The Z130 Fluxgate Compass Transducer contains a precision Fluxgate sensor. This can be replaced by following the procedures in Section 5. Some early models (pre Serial No 600001 were susceptible to damage in transit (fluxgate sensor springing free from gimbal assembly).
Page 160 Autohelm Autohelm Autohelm Autohelm Z130 Fluxgate General Assembly SeaTalk Service Manual...
Page 161 Autohelm Autohelm Autohelm Autohelm 4. Gimbal Support Bracket installation (Spares Kit M096) This kit comprises of a back case, cable assembly, pivot blocks, support bracket and pivot retaining screws. 1. Remove the four case screws and take off the front cover and seal. 2.
Page 162 Autohelm Autohelm Autohelm Autohelm 6. Before installing the cover check the gymballing action of the new assembly by tilting the case in all directions and observing the fluxgate movement. 7. Refit the front cover and seal (again rotating the screws anticlockwise to locate and tightening with a hand screw driver).
Page 163 Autohelm Autohelm Autohelm Autohelm 6. Product history - Fluxgate Compass (Z130) Change Serial No Comments Production Start 400001 Gimbal Support 600001 Reduces risk of fluxgate assembly bracket added becoming dislodged during transit. 7. Spares Numbers - Fluxgate Compass (Z130) Item Catalogue No.
Page 164 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 165 Autohelm Autohelm Autohelm Autohelm Fluxgate Compass (Z105) SeaTalk Service Manual...
Page 166 Autohelm Autohelm Autohelm Autohelm Contents Page 1. Description 2. Functional Test 3. Magnetic Deviation SeaTalk Service Manual...
Page 167 Autohelm Autohelm Autohelm Autohelm Fluxgate Compass (Z105) 1. Description The Z105 Fluxgate Compass Transducer contains a precision Fluxgate sensor and, once detected as faulty, should be replaced as a complete unit. 2. Functional Test Disconnect the Fluxgate from the autopilot and check continuity as follows:- Cable Colour Resistance Screen to Blue...
Page 168 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 169 Autohelm Autohelm Autohelm Autohelm Rudder Reference Transducer (Z060) SeaTalk Service Manual...
Page 170 Autohelm Autohelm Autohelm Autohelm Contents Page 1. Description and Functional Test 2. Resetting Centre Position 3. Product History Illustrations Fig. 1. Rudder Reference Unit Standard Installation Fig. 2. Adjusting Centre Position SeaTalk Service Manual...
Page 171 Autohelm Autohelm Autohelm Autohelm 1. Description and Functional Test The rudder reference transducer contains a single turn plastic potentiometer to provide the course computer with rudder position information. With the rudder reference transducer disconnected from the connector unit, its operation can be checked as follows:- a) Connect an Ohmeter across the blue and red wires.
Page 172 Autohelm Autohelm Autohelm Autohelm Fig. 1. Rudder Reference Unit Standard Installation SeaTalk Service Manual...
Page 173 Autohelm Autohelm Autohelm Autohelm Fig. 2. Adjusting Centre Position SeaTalk Service Manual...
Page 174 Autohelm Autohelm Autohelm Autohelm 3. Product History Rudder Reference (Z060) Change Serial Number Slotted mounting holes introduced 980001 Stainless Steel fittings introduced 290001 Stainless Steel studding introduced K90001 SeaTalk Service Manual...
Page 175 Autohelm Autohelm Autohelm Autohelm Pushpit Windvane Transducer (Z087) Masthead Windvane Transducer (Z080) Service Procedures SeaTalk Service Manual...
Page 176 Autohelm Autohelm Autohelm Autohelm Contents Page 1. Description 2. Functional Test (Z080 Masthead Transducer) 3. Functional Test (Z087) Pushpit Transducer) 4. Product History 5. Spares Numbers Illustrations Fig. 1. Z080 Masthead General Assembly Fig. 2. Z080 Mount Assembly SeaTalk Service Manual...
Page 177 Autohelm Autohelm Autohelm Autohelm 1. Description The Z080 and Z087 Windvane transducers are only compatible with Autohelm Seatalk products. The push pit transducer (2087) is identical to the Vane transducer in the Masthead Unit (Z080). When connecting a masthead Transducer (Z080) to an Autohelm ST7000 Autopilot do not connect the yellow core into the Aux 1 connector in the connector box.
Page 178 Autohelm Autohelm Autohelm Autohelm 4. Product History (Z080 Masthead Transducer) Change Serial No. Comments Production Start 590001 Drain hole added to anemometer boss K90001 Connector housing length K90164 Allows mast arm assembly to be increased located tighter onto mast socket Self cut grub screws replace brass L90000 Tighter location of vane and cups...
Page 179 Autohelm Autohelm Autohelm Autohelm Z080 Masthead Transducer General Assembly SeaTalk Service Manual...
Page 180 Autohelm Autohelm Autohelm Autohelm Z050 Mount Assembly SeaTalk Service Manual...
Page 181 Autohelm Autohelm Autohelm Autohelm Linear Drive Units Service Procedures SeaTalk Service Manual...
Page 182 Autohelm Autohelm Autohelm Autohelm Contents Page 1. Linear Drive Unit Introduction 2. Inspection 3. Dismantling 4. Re-assembly 5. Operation with non Autohelm Autopilots (24V systems) 6. Functional Test 7. Product History (Type 2 Long Stroke) 8. Product History (Type 1) 9.
Page 183 Autohelm Autohelm Autohelm Autohelm 1. Linear Drive Unit The linear drive unit comprises a belt drive reduction stage from the motor, a single epicyclic gearbox and a two start recirculating-ballscrew to provide linear motion. An electromagnetic clutch locks the outer ring of the epicyclic gearbox when drive is required.
Page 184 Autohelm Autohelm Autohelm Autohelm Slide off the carrier assembly and the four planet gears. Finally withdraw the driven pulley assembly from the drive module. 4. Re-assembly In all cases rebuilding the unit is a straight reversal of the above procedures, but the following points should be noted:- a) If replacing a drive motor, first ensure that the drive pulley is fitted in the correct orientation (general assembly).
Page 185 Autohelm Autohelm Autohelm Autohelm Linear Drive Unit - Functional Test Procedure (Z029, Z032, Z039, Z085, Z059) SeaTalk Service Manual...
Page 186 Autohelm Autohelm Autohelm Autohelm * No load current limits :- Minimum (A) Maximum (A) Type 1 (Z039) Type 2 12V (Z029, Z058) Type 2 24V (Z032, Z059) SeaTalk Service Manual...
Page 187 Autohelm Autohelm Autohelm Autohelm Fig. 1. Linear Drive Unit (Z029, Z032, Z039, Z058, Z059) General Assembly SeaTalk Service Manual...
Page 188 Autohelm Autohelm Autohelm Autohelm 7. Product History Type 2 Linear Drive Actuators (Long Stroke) (Z029 & Z032) Change Serial Number Comments Introduction 470001 Fracmo Motors 780042 introduced Girdle Buffer/Stop 790045 Extended high temperature use caused material changed rubber buffer to swell giving higher back drive Rockford Leadscrew 100002...
Page 189 Autohelm Autohelm Autohelm Autohelm 10. Spares Numbers - Linear Drive Unites (Z029, Z032, Z039 Z058 & Z059) Item Catalogue No. Drive Motor (Z039) N001 Drive Motor (Z058 & Z029) N002 Drive Motor (Z032 & Z059) N003 Short Stroke drive module N004 Long Stroke drive module N005...
Page 190 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 191 Autohelm Autohelm Autohelm Autohelm Rotary Drive Units (Z028, Z031 & Z037) SeaTalk Service Manual...
Page 192 Autohelm Autohelm Autohelm Autohelm Contents Page 1. Rotary Drive Unit Introduction 2. Dismantling 3. Re-assembly 4. Operation with non Autohelm Autopilots (24V) 5. Functional Test 6. Spares Numbers Illustrations Fig. 1. General Assembly SeaTalk Service Manual...
Page 193 Autohelm Autohelm Autohelm Autohelm 1. Rotary Drive Unit The rotary drive unit comprises a belt drive reduction stage from the motor, and a two stage epicyclic gearbox. An electro-magnetic clutch locks the outer ring of the first stage gearbox when drive is required. This arrangement provides very quiet operation with low backdrive torques.
Page 194 Autohelm Autohelm Autohelm Autohelm b) When rebuilding the clutch rotor and plate assembly ensure the rotor can be pulled forward along the two dowels against the spring and when released it returns hard against the mounting plate. If this is not done, the assembly will jam the drive train when the unit is rebuilt.
Page 195 Autohelm Autohelm Autohelm Autohelm Rotary Drive Unit - Functional Test Procedure (Z028, Z031, Z038) *No load current limits:- Minimum (A) Maximum (A) Type 1 (Z037) Type 2 12V (Z028) Type 2 24V (Z031) SeaTalk Service Manual...
Page 196 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 197 Autohelm Autohelm Autohelm Autohelm 6. Spares numbers - Rotary Drive Units (Z028, Z031, Z037) Item Catalogue No. Drive Motor (Z037) N001 Drive Motor (Z028) N002 Drive Motor (Z031) N003 Drive Belt N006 Clutch/Rotor N007 SeaTalk Service Manual...
Page 198 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 199 Autohelm Autohelm Autohelm Autohelm Hydraulic Drive Units Service Procedures Type '0' Piston Pump (Z081) Constant Running Power Pack (Z064, Z065, Z066, Z067) Reversing Gear Pump (Z030, Z033, Z041) SeaTalk Service Manual...
Page 200 Autohelm Autohelm Autohelm Autohelm Contents Page 1. Hydraulic Drive Units Introduction 2. Constant Running Power Pack (Z064/65/66/67) 2.1 Dismantling and Re-assembly 3. Reversing Gear Pumps (Z030/33/41) 4. Type '0' Piston Pump (Z081) 4.1 Type '0' Pump Re-installation 4.2 Type '0' Pump Bleeding Illustrations Fig.
Page 201 Autohelm Autohelm Autohelm Autohelm 1. Hydraulic Drive Units Three types of hydraulic drive units are covered, the constant running power pack, the reversing gear pumps and the type '0' piston pump. The most common cause of problems is trapped dirt in the valve assemblies between the balls and their seats. This provides a short circuit path for the oil, which will greatly reduce the pressure generated to move the steering cylinder.
Page 202 Autohelm Autohelm Autohelm Autohelm c) If the relief valve assembly is removed, the relief valve setting should be checked after reassembly. The factory pre-set is 750 psi. d) Ensure all parts are reassembled in the current sequence and nothing is missed out during reassembly.
Page 203 Autohelm Autohelm Autohelm Autohelm Fig. 1.Z064/6 5/66/67 – Constant Running Power Packs – Pilot Check and Relief Valve General Assembly SeaTalk Service Manual...
Page 204 Autohelm Autohelm Autohelm Autohelm 3. Reversing Gear Pumps (Z030f Z033, Z041) Reversing Gear Pumps are fitted with a single check valve assembly which allows operation with unbalanced rams. To clean the valve assemblies, it is usually only necessary to remove the cap, spring and ball.
Page 205 Autohelm Autohelm Autohelm Autohelm Fig. 2. Z041, Z030, Z033 - Reversing Gear Pump SeaTalk Service Manual...
Page 206 Autohelm Autohelm Autohelm Autohelm 4. Type'0'Piston Pump (Z081) A faulty type '0' pump should be replaced as a complete item. Care should be taken when removing the pump, not to introduce any dirt into the hydraulic system. The type '0' pump is sensitive to trapped air and care should be taken to remove it during installation and commissioning.
Page 207 Autohelm Autohelm Autohelm Autohelm Fig. 3. Type '0' Piston Pump Bleeding SeaTalk Service Manual...
Page 208 Autohelm Autohelm Autohelm Autohelm SeaTalk Service Manual...
Page 209 Autohelm Autohelm Autohelm Autohelm Inboard/Outboard Drive Unit (Z088) Service Procedures SeaTalk Service Manual...
Page 210 Autohelm Autohelm Autohelm Autohelm Contents Page 1. I/O Drive Unit Introduction 2. Motor Replacement 2.1 Dismantling 2.2 Re-assembly 3. Functional Test 4. Spares Numbers Illustrations Fig. 1. General Assembly SeaTalk Service Manual...
Page 211 Autohelm Autohelm Autohelm Autohelm Fig. 1. I/O Drive Unit - Exploded View (Z088) SeaTalk Service Manual...
Page 212 Autohelm Autohelm Autohelm Autohelm 4. Spares numbers - I/O Sterndrive Unit (Z088) Item Catalogue No. Drive Motor N017 Drive Assembly N018 Mercruiser Installation Kit D137 Volvo Installation Kit D129 SeaTalk Service Manual...
Page 213 The I/O drive unit may be used with all 610 versions of the AH6000 power pilot and both the SeaTalk ST6000 and ST7000 Autopilots. Servicing is restricted to motor replacement. Great care must be taken when servicing to ensure all screws are fully tightened. The I/O Drive Unit is subjected to high vibration levels and loose screws will quickly work free.
Page 214 Autohelm Autohelm Autohelm Autohelm - Position the support plate sub-assembly on clutch shaft and ensure Idler shaft and support plate pillars engage correctly, the support plate must be held square during assembly to prevent damage to the clutch shaft. - Fully tighten the 4 off screws complete with washers to secure support plate. - Assemble rear dust cover to master plate sub-assembly and fully tighten the 2 off securing screws.

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