Air Compressor Help

[ARAMP1]

I have a Craftsman Professional model 919.184191 air compressor. It's a 60 gallon tank 7 HP single stage compressor. It's about 6 years old and it just flat out would not turn on the other day. So, I drained the tank ans started troubleshooting. Here is a list of some things that I've done, and now I'm not sure where to look next.

The electrical outlet works and pressing the overload reset button on the motor does not work.
Both the motor and compressor turn freely.
The pressure check valve was a bit dirty, but it still worked, so I cleaned and re-installed it.
I replaced the pressure switch since the other showed some signs of corrosion.

Now I'm kind of at a loss as for what to do next. Any suggestions?

 

[JKgrizzly]

Check for power at the motor. If you have power there It has to be the motor, if not it's the switch. Or possibly starting capacitor, if it has one.

 

[ARAMP1]

How would I find out if it has a start capacitor?

 

[pattenp]

See the two cylinder looking covers on the side of the motor? Those are the capacitors. One should be the start and the other the run.

 

[pattenp]

One way to test the motor is to remove the belt to the compressor and direct wire the motor to a cord and plug it in to see if the motor runs. If it doesn't then most likely it's one of the caps, if it does run then you have a bad switch. Oh.. but you said you changed the switch... it may be one of the caps.