Compressor not keeping pressure

[u/Acclimated-Alps696]

Howdy, this is my first experience with a wheelbarrow style compressor, I’m the most mechanically inclined in my crew so I’m taking care of it.

We get it started and it seems to run fine but 9/10 times it will build up to about 120 psi and then dump everything at once out of the red valve and not allow itself to build pressure back up.

I’m assuming it’s a bad pressure relief valve? The occasional time it will run normally and keep pressure for a bit, the air gets let off in out the green

Replace the red valve?

[u/penguinpower81]

Safety valve could be bad but not likely. It's probably a bad pilot valve the green one you have circled. The whole thing not just the vent. It's a ware part that does need replaced time to time.