losing air

[donnie wigginton]

When the air builds up pressure it will start leaking at a small hole on the outside of the head.

[Greg Pham]

I experienced the same problem with my DeWalt D55141 compressor. The air leaks when the pressure reaches 80 to 100 psi. I saw a small hole on the outside of the head if you shine a light from the other side of the head. I filled the hole on the outside using epoxy pudding that I bought at a hardware store.

[Mark]

Hi Donnie and Greg,

The hole on the side of the head should be there. It is a pressure release hole to guard against a bad check valve. If the check valve fails, air from the tank will bleed back to the cylinder. With the tank pressure pushing back on the piston the motor must work much harder and will heat up and fail. The hole must not be blocked. Replacing the check valve should solve the air leak. The check valve is part #D27022 and is available from http://www.ereplacementparts.com.

I hope this helps with your repair!

-Mark