Replaced compressor that was quoted yesterday. Unit did not have a filter line drier so it caused the compressor to fail prematurely. Brazed out old compressor and brazed in new compressor while flowing nitrogen. Added filter line drier. Pressure tested to 250psi and unit held pressure. Vacuumed unit to 480 microns and it held. Started unit up and added refrigerant to match manufacturing specs. System has 15 degrees superheat and 10 degrees subcool. System is cooling properly at this time.