Mike's Workshop Manuals: Service manuals for every vehicle
Home >> GMC >> 1989 >> Forward Control 4.8 T, Standard >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> A/C Compressor Oil Checking >> Placing System In Operation

Placing System In Operation

After component service or replacement has been completed and all connections have been made, evacuate system thoroughly with a vacuum pump. Charge system with proper amount of refrigerant and perform a leak test. Be sure to check all fittings that have been opened. After system has been leak tested, make a system performance check.