prime mover smx45 Master Service Manual page 12

Switches ....................................................................................................... 219
Theory of Operation ............................................................................................ 219
Maintenance ....................................................................................................... 220
Troubleshooting .................................................................................................. 222
Repair and Rebuild ............................................................................................. 223
Main ON/OFF Switch .................................................................................................. 224
Arm Angle Switches .................................................................................................... 224
Lift Limit Switch ........................................................................................................... 225
Key Switch (Optional) .................................................................................................. 226
Horn Switch ................................................................................................................. 226
Converting Keypad to Key Switch ............................................................................... 227
Fuses/Circuit Breakers ............................................................................... 229
Theory of Operation ............................................................................................ 229
Maintenance ....................................................................................................... 229
Wiring Harness ............................................................................................................ 230
Power Cables .............................................................................................................. 231
Circuit Breaker ............................................................................................................. 232
Master Control Relay ................................................................................................... 233
Troubleshooting .................................................................................................. 234
Repair and Rebuild ............................................................................................. 234
Contactor Panel ........................................................................................... 235
Theory of Operation ............................................................................................ 235
Maintenance ....................................................................................................... 235
Troubleshooting .................................................................................................. 235
Resistance Testing ...................................................................................................... 235
Repair and Rebuild ............................................................................................. 236
Transistor Controller .................................................................................. 239
Theory of Operation ............................................................................................ 239
Basics Of Circuit Operation ......................................................................................... 239
Interface ...................................................................................................................... 240
Control Features .......................................................................................................... 241
Motor Circuit ................................................................................................................ 241
Control Circuit .............................................................................................................. 242
Definitions .................................................................................................................... 243
Maintenance ....................................................................................................... 244
Safety .......................................................................................................................... 244
Cleaning ...................................................................................................................... 244
Troubleshooting .................................................................................................. 245
Diagnostics and Troubleshooting ................................................................................ 245
Fault Codes ................................................................................................................. 245
Repair and Rebuild ............................................................................................. 247
Electronic Tiller Arm Card (ETAC) ............................................................. 249
Theory of Operation ............................................................................................ 249
Maintenance ....................................................................................................... 250
Troubleshooting .................................................................................................. 250
Repair and Rebuild ............................................................................................. 251
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Master Service Manual 2004-05-17