After Charging A/C System and Before Activating A/C System

-- After installing a new A/C compressor or adding fresh refrigerant oil (for example, after blowing through the refrigerant circuit), turn the A/C compressor ribbed belt pulley 10 rotations by hand before starting the engine. This prevents damage to the A/C compressor.

-- For 5-cylinder and 10-cylinder diesel engines, rotate A/C compressor 10 rotations by hand at overload protection. Then install A/C compressor. This prevents damage to the A/C compressor.

-- Start the engine with the A/C turned off (A/C Clutch -N25- and A/C Compressor Regulator Valve -N280- are not actuated).

-- Following engine idling speed stabilization, switch on A/C compressor and run it for at least 10 minutes at idling speed with maximum cooling output.