ALTENATORAC or DC OnlyAC Only AlternatorThe AC alternator is designed to operate as an integralpart of the engine. It provides current for lights normallyused on lawn and garden equipment.Fig. 162 - AC Circuit AlternatorCurrent for the lights is available as long as the engine isrunning. The output depends upon engine speed.Twelve-volt lights with a total rating of 60 to 100 wattsmay be used. With lights rated at 70 watts, the voltagerises from 8 volts at 2400 RPM to 12 volts at 3600 RPM,so the brightness of the light changes with the enginespeed. The 5 amp lighting alternator uses less than .2 ofa horsepower at full output.Fig. 163 - Typical AC Wiring DiagramThe test procedure for this alternator is located in theDual Circuit Alternator Section 7, page 54.DC Only AlternatorThe DC alternator is designed to operate as an integralpart of the engine and is separate from the enginestarting system. It is intended to provide DC chargingcurrent for 12 volt batteries. Recommended batterysizes range from 12 ampere hour for warm temperatureservice to 24 ampere hour in coldest service for modelseries 130000. Model series 140000 and up range from20 ampere hour for warm temperature service to 40ampere hour in coldest service.Fig. 164 - DC Circuit AlternatorThe current from the battery charging alternator isunregulated and is rated at 3 amperes. The output risesfrom 2 amperes at 2400 RPM to 3 amperes at 3600RPM; the alternator uses less than .2 of a horsepower.WARNING: For electrical safety always remove cablefrom negative (-) side of the battery before attemptingany repairs or maintenance to engine or equipment.Fig. 165 - Typical DC Wiring DiagramThe test procedure for this alternator is located in theDual Circuit Alternator Section 7, pages 52 and 53.51
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