Table Of Contents - AUTOHELM ST4000+ Service Manual

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
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
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Gearbox disassembly ................................................................. 15
ST4000+ Autopilots Service Manual 83115-1