OUTLET TUBE N134023

There was an air leak after the compressor came to pressure and automatically shut off. This caused the compressor to cycle on and off even though no air was being used by the tool. The leak appeared to be coming from near the compressor head near the aluminum cooling tube and seal. I replaced both the tube and seal, but the leak was ... Read more still there. It turns out, there is a small hole in the compressor head that is part of the compressor design. The leak turned out to be caused by a faulty check valve. The check valve is located at the end of rubber tube that connects between the aluminum cooling tube and the air tank. The check valve is only supposed to allow air flow into the tank and mine was allowing airflow back into the compressor. I replaced the check valve and hose clamp and that fixed the problem. I also applied teflon tape to the treads of the new check valve to insure the threads sealed when tightening the check valve into the tank.

R&R outlet hose and seal. A bit challenging to determine how to get access but straightforward after that. Leak fixed holds pressure for weeks now.
First remove gauge housing, 2 screws. Trick for access is to remove 2 small screws locking compressor housing to tank and sliding it sideways to remove it. Then 4 Torx head screws and ... Read more the plastic housing splits allowing access.

removed compressor from tank replaced outlet tube and cleaned everything and reassembled,

1. Disassembled the outer cover.
2. Removed the head and the outlet tube.
3. Cleaned the gasket from the head.
4. Replaced the tube seal.
5. Reassembled the head and the outlet tube.
6. Reassembled the compressor.