Install the dryer desiccant as quickly as possible to prevent the system from absorbing moisture from the air.

If you are installing a new dryer desiccant, add the appropriate refrigerant oil for the A/C compressor which installed to the vehicle.

New O-rings should be used at each fitting. Prior to installation, apply a thin coat of the same refrigerant oil used in the A/C compressor. Be sure to use the correct O-rings for refrigerant types to avoid leakage.

Install the cap to the specified torque. It is made of plastic and can be easily stripped.