O-Ring And Refrigerant Connection
WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
| 1. | Front heating and cooling unit assembly | 2. | High-pressure and low-pressure pipe | 3. | Low-pressure service port |
| 4. | Low-pressure flexible hose | 5. | Compressor | 6. | High-pressure flexible hose |
| 7. | Condenser pipe assembly | 8. | Condenser (includes liquid tank) | 9. | High-pressure service port |
| 10. | High-pressure pipe |
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 cycle 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.
- Do not reuse O - rings.
- Apply oil to circle of the O - rings shown in illustration below when connecting tube. Be careful not to apply oil to threaded portion.
- O - ring must be closely attached to the groove portion of tube.
- Be careful not to damage O - ring and tube when replacing the O - ring.
- Connect 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 is no leaks from connections after connecting line. Disconnect that line and replace the O - ring when the refrigerant leaking point is found. Then tighten connections of seal seat to the specified torque.