[Shop-talk] Compressor woos

[Jimmie Mayfield]

On 8/10/21 09:23, John T. Blair wrote:
>
> compressor went to cut on, but it didn't start.  I could hear a 
> humming.  I
> run over the the compressor, but before I can turn it off, it trips 
> the new
> breaker. 


Try the following:

1. Turn the compressor off
2. Bleed off the pressure in the tank down to, say, 30-40psi
3. Turn the compressor on.

What happens?  Does it start?

Sounds like your unloader valve might be going bad though since you have 
a bonafide 5hp motor, I'm a little surprised it can't power through it.  
What size circuit do you have it on?  30A?