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Re: converting from 220 to 110 volts
Most brands of air comperssors are built to work on either 220 or 110 v. I believe that 220 v compressors are more efficient and draw less current and run cooler.
The more expensive compressors have a switch allowing for voltage selection. Still others will have a wiring diagram printed on the motor allowing voltage change by changing jumpers. Most all of the sears compressors that I have repaired were of single voltage with no other way to change except change motor. Do not worry however, you have the better motor. It is easier to convert the outlet plug to 220 by isolating the circuit and installing a 220 v breaker. enjoy
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Hi robles212 To convert your T-30 to single phase you will have to do one of two things. 1. Change the motor to a single phase motor 2. Buy and install a "Phase Converter" to convert 3 phase to single phase Please rate me Bud
yes white and black are both line voltage in.each wire will have 110 to 120 volts. Attach one wire to top of starter contactor left side the other to top of starter contactor right side. Attach green wire to ground.
Your Craftsman model 919.165200, 5hp, 20 gallon compressor was designed to run on 115~120v 15amp. I believe that it was made by Campbell Hausfeld and is of the oilless single cylinder type. If however your compressor is oil lubed and has a motor /drive belt configuration it may be able to convert if there is a spec plate on the motor with alternate wiring diagram. Many high-end compressors like Rol Air, Jenny, Dewalt, etc with motor/belt drive have a switch selectable voltage, however one must still change the power cord when using 220v. Good luck with your projects and post again if your have other question.
Most compressors have a check valve installed in the tank that allows air from the compressor to enter the tank and not allow back pressure to the compressor. Also there is an unloader valve at the pressure switch that activates when the pressure switch cuts out releasing the pressure in the line. These two devices allow the compressor to start in an unloaded condition so that the motor will not strain. When you place you finger on the intake, the compressor is no longer pumping air thus there is not load on the motor. Your problem may be the intank check valve or the capacitor may be weak or bad. Simple check for both. Many volt meters have capacitor check and amp draw. The capacitor should not be more than 10 percent or rating. enjoy