Dewalt d55140 won’t shut off at cut out - new pressure switch

by J. Woods
(Copperas Cove, tx)

Dewalt d55140 won’t shut off at cut out pressure even after installing new pressure switch.


I got a Dewalt d55140 compressor free from a friend. It wouldn’t shut off at the factory cut out pressure of 135psi, so I replaced the pressure switch. It still won’t shut off though and I’m not sure where to go from here. Would really appreciate any info you can guve me to point me in the right direction.

Comments for Dewalt d55140 won’t shut off at cut out - new pressure switch

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Jun 13, 2018
Dewalt d55140 type 1 or 2?
by: Doug in s.d.ca

It should be noted on the ID decal.

If that is missing or illegible, the type 2 has an air connector at the right side of the tank at the top, while the type 1 is at the back of the tank.

Either way, the tube to pressure switch is probably leaking. If the tube is not split rotted, a gear clamp on it from the local big box store should fix it.

Let us know what you find, please. Good luck.

Jun 12, 2018
Not sure
by: J Woods

How can I tell what type it is?

Jun 09, 2018
A type 1 or 2 Dewalt d55140 pressure switch?
by: Doug in s.d.ca

And, if there's a tube to it, check that it's not leaking.

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