Ingersoll Rand ~ IR type 30 4 and 2 1/2 x 2 1/4 air blowing off
Ingersoll Rand T30 air compressor
IR type 30 4 and 2 1/2 x 2 1/4
Serial No TP95442 L15
This machine has a 4kW (5.4 hp) 3 phase 1420 rpm motor with a 9" dual V motor pulley. It pumps very well and quickly reaches 100 psi (set to trip @ 140psi) then slows down along with a release of compressed air from around a small pipe that goes into the crankcase between the V cylinders. Pump has plenty oil and seems free. Any ideas before I run a current test on the motor to look for shorted windings etc.
I can't see where the air is discharging, Phil. I suspect that it's a PRV blowing off, and that's suggesting that something downstream of it is cause an air dam or back pressure, pressure builds in the line between cylinders, and the safety release goes.
I'd be looking, therefore, at the second cylinder for issues, before I'd look to the motor.