Autohelm Inboard Autopilots (ST6000 and ST7000 systems) Service ...

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AutohelmContentsPage1. Linear Drive Unit Introduction 32. Inspection 33. Dismantling 34. Re-assembly 45. Operation with non Autohelm Autopilots (24V systems) 46. Functional Test 47. Product History (Type 2 Long Stroke) 88. Product History (Type 1) 89. Product History (Type 2 Short Stroke) 810. Spares Numbers 9IllustrationsFig. 1. General Assembly 72SeaTalk Service Manual
Autohelm1. Linear Drive UnitThe linear drive unit comprises a belt drive reduction stage from the motor, a singleepicyclic gearbox and a two start recirculating-ballscrew to provide linear motion. Anelectromagnetic clutch locks the outer ring of the epicyclic gearbox when drive isrequired. The drive is unique in providing efficient drive combined with very smoothbackdrive at extremely low loads.2. InspectionBefore stripping down or testing the drive unit, a close visual inspection should bemade to establish if the cause of the problem is external.Poor mechanical installation where the unit can foul obstructions, particularly at theend of stroke, can distort the drive module and lead to rough operation and highbackdrive loads. The drive module is assembled at Nautech in a dirt free environmentto precise limits. If disturbed, rough operation and high backdrive loads will result.3. DismantlingAfter removing the unit from the boat and to gain access to drive motor, drive belt,clutch rotor or drive module the following steps apply:a) Unscrew and remove the two caphead screws which secure the plastic dust coverto the main unit (use 'M3' alien key). Slide the dust cover off the girdle tube.b) Unscrew and remove the four M6 caphead screws with washers and the two longhexagonal studs at the centre-sides of the master plate. Separate the mounting coverassembly from the master plate assembly, after feeding the cables through thegrommet.c) If servicing the clutch rotor assembly, remove it from the mounting plate byunscrewing the central caphead screw which secures the assembly to the casting.Note that the assembly is sprung loaded and care should be taken when removing.d) If replacing the drive belt, loosen the three M6 caphead screws with washerswhich secure the motor to the masterplate. With the tension taken off the belt it canbe slipped off both pulleys.e) If replacing the drive motor unscrew and remove the three M6 caphead screws asabove and take the weight of the motor as it is released. Note that the power cablesare extended and passed through grommets in the masterplate. Remove the drivebelt.f) If servicing the drive module, follow steps a) b) d) and e) above. Then remove thecirclip at the front of the clutch plate/ring gear assembly and withdraw the assembly.Locate the leadscrew journal and carrier on a firm block to prevent bending thejournal and drive out the roll pin securing the carrier to the leadscrew (generalassembly).SeaTalk Service Manual 3
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AutohelmAutohelm Inboard Autopilots
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AutohelmST7000 SystemMaster Table o
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AutohelmST7000 System IndexPage1. I
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Autohelm3. Operating/Calibration in
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AutohelmDisplay Key SequenceWatch A
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AutohelmUnsatisfactory Steering Per
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AutohelmWind Change AlarmWind Trim
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AutohelmAdjusting CalibrationIn cal
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Autohelm3. 5 Automatic Deviation Co
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Autohelm5. Track Control interfacin
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Autohelm6. Special functions.6.1 Di
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Autohelm7.1 Service Visit - Diagnos
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AutohelmContentsPage1. Description
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Autohelm5. When finally refitting t
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AutohelmLCD Display Assembly6SeaTal
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Autohelm8SeaTalk Service Manual
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Autohelm1. Control Unit PCB Circuit
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ST7000 Course Computer General Asse
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Autohelm4. Functional TestThe Cours
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AutohelmSeaTalk Service Manual 9
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Autohelm4.3 Course Computer Bench T
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Autohelm2. Technical InformationCon
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Autohelm1.4. Clutch DriveTR10, 11 a
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AutohelmFig. 1. ST7000 (Z083 and Z0
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AutohelmContentsPage1. Introduction
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Autohelm3. Operating/Calibration In
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AutohelmDisplay Key SequenceThe Dis
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AutohelmWatch Alarm (not available
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Autohelm3.2 Additional information
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Autohelm3.3 Operating HintsResponse
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Autohelm• If the autopilot fails
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Autohelm3.4.1 Adjusting Calibration
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Autohelm3.5 Automatic Deviation Cor
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Autohelmmessage indicates the ST600
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Autohelm7. Service visit to a vesse
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Autohelm1. Service ProceduresConten
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Autohelm5. Pull the loom assemblies
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Autohelm4. Z124 Control Unit Functi
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Autohelm5. Product History - Contro
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Autohelm1. Control Unit PCB Circuit
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AutohelmCourse Computers (Z083, Z08
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Autohelm4.1 Course Computer Bench T
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Autohelm5. Product History - Course
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Autohelm1. ST 6000 Course Computer
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Page 144 and 145: Autohelm1. Type CR Interface Box PC
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Page 162 and 163: Autohelm6. Before installing the co
Page 172 and 173: AutohelmFig. 1. Rudder Reference Un
Page 174 and 175: Autohelm3. Product History Rudder R
Page 178 and 179: Autohelm4. Product History (Z080 Ma
Page 180 and 181: AutohelmZ050 Mount Assembly6SeaTalk
Page 184 and 185: AutohelmSlide off the carrier assem
Page 186 and 187: Autohelm* No load current limits :-
Page 188 and 189: Autohelm7. Product History Type 2 L
Page 192 and 193: AutohelmContentsPage1. Rotary Drive
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Page 200 and 201: AutohelmContentsPage1. Hydraulic Dr
Page 202 and 203: Autohelmc) If the relief valve asse
Page 204 and 205: Autohelm3. Reversing Gear Pumps (Z0
Page 206 and 207: Autohelm4. Type'0'Piston Pump (Z081
Page 210 and 211: AutohelmContentsPage1. I/O Drive Un
Page 212 and 213: Autohelm4. Spares numbers - I/O Ste
Page 214: Autohelm- Position the support plat
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