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Home >> GMC >> 1987 >> Forward Control 7.4 W, Standard >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> A/C System General Servicing >> System Servicing Precautions >> Placing System In Operation
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Placing System In Operation

After component replacement and/or system servicing has been completed and all connections have been made, proceed as follows:

  1. Evacuate system using vacuum pump.
  2. Charge system with R-12. See REFRIGERANT CAPACITY in this section.
  3. Leak test system. Give particular attention to all new connections and components.
  4. Perform performance test of system. Never assume recharging has automatically corrected a problem.
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