Question about Makita MAC2400 Electric Powered Air Compressors

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New Pressure Switch too big to screw onto tank?

I just ordered a replacement oem pressure switch. It did not come with any directions. I was able to unscrew the old part as I had taken the top off (mistake as it came totally apart and I could not figure out how to put it back together). With the top part of the pressure switch still screwed down, the part looks too tall to rotate back onto the bottom tank. Do I need to remove the motor shroud, or is a way to take the top part of the pressure switch off without all the parts of the on/off mechanism falling out? Thanks in advance for any input. Jeff

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  • Makita Master
  • 1,383 Answers

I usually install/add a union to bottom of pressure switch.. I makes it easy to remove and re-install the switch later if needed. Unions come in brass or steel and sold thru all lumber /plumbing stores. Good luck with your repair.

Posted on Apr 06, 2015

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Posted on Jan 02, 2017

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SOURCE: How to put the pressure switch back together?

Without having a look myself its a little difficult to know where the black plastic plate comes from. There are so many tiny parts in those things.

But normally when you have air coming from the pressure switch, it usually comes from the check valve, that is located at the other end of the pipe which attaches from the pressure switch to the tank, where it fixes to the tank, is where the check valve is. When there is no pressure in the tank, unscrew it, clean it up or replace it, then that should solve your air leak.

As for the pressure switch, either you need an exploded view of it so you can see where the plate goes, or you may have to replace it altogether

Posted on Aug 07, 2012

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