F 450 4WD Super Duty V10-6.8L VIN D (2004)
High Pressure Safety Valve HVAC: Service and Repair
AIR CONDITIONING (A/C) PRESSURE RELIEF VALVE
REMOVAL
CAUTION: Refrigerant Compressor Oil (mineral oil) F73Z-19577-AA (Motorcraft YN-9-A) should be used to lubricate R-134a refrigerant
system O-ring seals only and should not be added to R-134a refrigerant systems as an A/C compressor lubricant. PAG Refrigerant Compressor
Oil (R-134a Systems) F7AZ-19589-DA (Motorcraft YN-12-C) or equivalent meeting Ford specification WSH-M1C231-B only should be used as
an A/C compressor lubricant.
NOTE: Installation of a new suction accumulator is not required when repairing the air conditioning system except when there is physical evidence of
contamination from a failed compressor or damage to the suction accumulator.
1. Recover the refrigerant.
2. Remove the pressure relief valve.
INSTALLATION
1. To install, reverse the removal procedure.
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Install a new O-ring seal lubricated in clean mineral oil.
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Lubricate the refrigerant system with the correct amount of clean mineral oil.
2. Evacuate, leak test and charge the refrigerant system.
