O-Ring And Refrigerant Connection
WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
A new type of refrigerant connection has been introduced to all refrigerant lines except the following locations:
- Expansion valve to evaporator
- Refrigerant pressure sensor to liquid tank
WARNING:
Check that all refrigerant is discharged into the recycling equipment and the pressure in the system is less than atmospheric pressure. Then gradually loosen the discharge side hose fitting and remove it.
CAUTION:
Observe the following when replacing or cleaning refrigerant components.
- Store it in the same way as it is when mounted on the vehicle when the compressor is removed. Failure to do so will cause oil to enter the low-pressure chamber.
- Always use a torque wrench and a back-up wrench when connecting tubes.
- Immediately plug all openings to prevent entry of dust and moisture after disconnecting tubes.
- Connect the pipes at the final stage of the operation when installing an air conditioner in the vehicle. Do not remove the seal caps of pipes and other components until just before required for connection.
- Allow components stored in cool areas to warm to working area temperature before removing seal caps. This prevents condensation from forming inside A/C components.
- Remove moisture thoroughly from the refrigeration system before charging the refrigerant.
- Always replace used O-rings.
- Apply oil to the O-rings shown in illustrations when connecting the tubes. Be careful not to apply oil to threaded portion.
- The O-ring must be closely attached to the groove portion of tube.
- Be careful not to damage the O-ring and tube when replacing the O-ring.
- Connect the tube until a click can be heard. Then tighten the nut or bolt by hand. Check that the O-ring is installed to tube correctly.
- Perform leak test and make sure that there are no leaks from the connections after connecting the line. Disconnect that line and replace the O-ring when the refrigerant leaking point is found. Then tighten the connections of the seal seat to the specified torque.