Question about Craftsman 1 hp Air Compressor, 4 gal. - 16638

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Took apart air pressure switch model lf10-4h. Can't reassemble

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I have a Makita MAC2400, it stopped working, didn't realize where the reset button was, took apart the on off switch thinking there may be a fuse, the spring made it all fall apart as soon as I took the...

The pressure switch is assembled by automation and is basically impossible to put back together by hand. Even if you did manage to get it back together, the adjustment if critical. Easier to replace with generic pressure switch. Order from ebay for about $15. Just pay attention to port size and cut-out pressure. Select a switch that has on/off ,several ports on bottom and cut-out from 125 -135 psi. Factory switch is too expensive and really not any better. Good luck

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Willnot shut off keeps gaining pressure,leaks from under switch box as its running dont leak after you unplug it

On my compressor, the pressure switch has a diaphram that moves with increased pressure to push the switch off. If yours is the same type, and the diaphram has a hole (maybe the leak you hear), it might not move far enough to push the switch off. Something to check. If you take the pressure switch apart, beware as there are springs and parts that will become instantly liberated, and they're difficult to reassemble.

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