Ranger 4WD V6-3.0L VIN U (1997)
Refrigerant Oil: Service and Repair
Refrigerant Oil Addition
DURING A/C COMPRESSOR REPLACEMENT
CAUTION: The R-134a A/C System FS-10 A/C compressor uses a unique high-quality refrigerant oil F2AZ-19577-AC, Motorcraft Part Number
YN-12b or equivalent refrigerant oil meeting Ford specification WSH-M1C231-B. An oil charge of 207 ml (7 oz) is used in a new system. It is
extremely important that only the specified type and quantity of refrigerant oil be used in the FS-10 A/C compressor. If there is a surplus of oil in
the system, it will circulate with the refrigerant, reducing the cooling capacity of the system. Using too little oil or oil not meeting the Ford
specification will result in poor lubrication of the A/C compressor.
When replacing a component of the refrigerant system, the procedures must be followed to make sure that the total oil charge in the system is
correct after the new part is installed.
