Aerostar 2WD V6-182 3.0L (1995)
Refrigerant Oil: Service and Repair
Refrigerant Oil Addition
It is important that only the specified type and quantity of refrigerant oil be used in the A/C compressor. If there is surplus oil in the system, too much
oil will circulate with the refrigerant, reducing the cooling capacity of the system. Too little oil will result in poor lubrication of the A/C compressor.
During A/C Compressor Replacement
The FS-10 A/C compressor used will require a special refrigerant oil with special additives. The A/C compressor used on R- 134a systems requires
YN-12b/F2AZ-19577-A oil, meeting Ford Specification WSH-M1C231-B.
R-134a Refrigerant Oil
The refrigerant oil required for R-134a A/C systems is a polyalkalylene glycol (PAG) oil, meeting Ford specification WSH-M1C23 1-B or equivalent.
This type of refrigerant oil was made specifically for R- 134a systems and is not suitable for use in R- 12 systems. Never use an R-134a refrigerant oil
in R-12 systems.
DURING COMPONENT REPLACEMENT
When it is necessary to replace a component of the refrigerant system, the correct procedures must be followed to make sure the total oil charge on the
system is correct after the new component is installed. During normal A/C operation, some refrigerant oil is circulated through the system with the
refrigerant and some is retained in the compressor. If certain components of the system are removed for replacement, some of the refrigerant oil will
go with the component. To maintain the original total oil charge, it is necessary to compensate for the oil lost by adding oil to the system with the
replacement part.
