I how a oil air compressor,when i plug it up ,it makes a loud noise,and ,its a sparks? It a craftsman 3 gallon

SOURCE: Sears Craftsman 3-Gallon, 1.5 HP Air Compressor Hums

YES IT MAY BE THE CAPACITOR . IT COULD ALSO BE THE WIREING IN THE MTR, THE PUNP ITSELF.

SOURCE: 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

SOURCE: Air compressor/ alot of air is coming out of the oil cap vent.

this could be blow back possibly bad piston rings you may need new rings oil chamber is usually at intake pressure unit may need rebuild

SOURCE: Oil capacity for craftsman air compressor circa 1978 model #106..

I have a 2hp craftsman air compessor with a two cylinder pump, Here is the info from my manual as far as oil capacitity:

Remove oil fill plug and slowly add
a compressor oil until it is even with the
top of the oil fill hole. NOTE: Do not
allow oil to be lower than 3/8"
from the top at any time. When filling
the crankcase, the oil flows very slowly
into the pump. If the oil is added too
quickly, it will overflow and appear to
be full. NOTE: Crankcase oil capacity is
approximately 16 fluid ounces.

I buy my compessor oil from Lowes in the tool department. It comes in 16oz and sells for about $3. I wouldnt worry about how many ounces it holds but rather that the oil level is to top of filler hole. Lowes also sells a synthetic oil for about $7 and is recommended for severe conditions (hot / cold / used all day). Good Luck!

SOURCE: Jobmate 3 gallon air compressor parts list/diagram

Good luck on this one. I own 2 jobmate compressors, one I bought and used very little before it blew apart and another a freind gave me to use for parts. Guess what the same part failed on both and I know of at ;east three more that also failed the same way.

I gave up trying to deal with Canadian Tire and Jobemate and junked them, as though they weren't junk to begin witn. You get what you pay for. I have a new Hausefield compressor and it is fantastic.