Mak Compressor Blues
My old Makita compressor started kicking the breaker trying to get up to running speed today.Its been running fine lately and its on a good line to the breaker box. Dont know where to start or what to check and at 60 lbs a lil hard to start sending off and where to send it off without doing at least some preliminary checks. Any ideas as to where to start.? The plug’s tangs do seem a lil loose in the outlet even if theyre spread. Guess could start with new plug end.?
First thing I would check would be the unloader. Usually located on the check valve, it lets the pressure off the head.
Let all air out then switch on.
Plug into a different recpt.
Sandpaper contacts on pressure switch.
A couple years ago we took two electric compressors (emglo's) into the shop for repair. They wouldn't kick on and they were popping the breakers.
The tool repairman took one apart and found that sawdust had infiltrated the windings and brushes. He blew them clean with air and it ran fine. He then blew the electric motor clean on the next one without disassembling. It ran fine. He told us to blow the electric motor clean at least once a week.
Let me know if that works.
The examples that treetalk and blueeyeddevil give are specific issues from a more general problem. That is, that something is preventing the motor from turning. The motor then draws more current in order to generate more horsepower, and then the fuse, instead of the motor, blows. The electrical system is functioning correctly.
IOW, your problem may be mechanical, not electrical. Take off any belts and rotate all the pulleys by hand. The motor shaft should turn easily, and if the unloader is working right so should the compressor shaft. But the compressor shaft won't turn by hand if you're trying to rotate it against compressed air in the cylinder.
If the mechanical is ok, then go after the electrical.
dial down the regulator to a low pressure.
..if it starts after the pressure drops,chances are pretty good the check valve has gone bad and / or the unloader is plugged up
and the elec plug may be NG too
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