advice?
what psi should I regulate the air compressor to remove the 54mm nut?

I have a 20 gallon air compressor and a 1/2 inch air wrench. 100psi could not remove the giant 54mm nut on the back of the motor. Should I crank the psi up any higher? I'm not certain what is a safe level of pressure to do.

 

Check the specifications on the impact wrench, it should tell you the maximum amount of pressure it can take without breaking.

 

Heat the nut with a torch it should melt the locktite.

 

Thanks. I changed the torque seeing on the air wrench to 9 and the psi to 120. Removed the nut easy