A/C Discharge Line - Installation

6.7L DIESEL ENGINE

CAUTION: Be certain to adjust the refrigerant oil level when servicing the A/C refrigerant system [1][2]Capacity Specifications . Failure to properly adjust the refrigerant oil level will prevent the A/C system from operating as designed and can cause serious A/C compressor damage.

NOTE: When replacing multiple A/C system components, see the Refrigerant Oil Capacities chart to determine how much oil should be added to the refrigerant system [1][2]Capacity Specifications .

NOTE: Replacement of the refrigerant line O-ring seals and gaskets is required anytime a refrigerant line is disconnected. Failure to replace the rubber O-ring seals and metal gaskets could result in a refrigerant system leak.






NOTE: Illustration shown with lower radiator hose removed for clarity.

1. If removed, install the A/C pressure transducer onto the A/C discharge line (4) A/C Pressure Transducer - Installation.
2. Remove the tape or plugs from the discharge line fittings and the compressor and jumper line ports.
3. Lubricate new O-ring seals with clean refrigerant oil and install them and new gaskets onto the discharge line fittings. Use only the specified O-ring seals as they are made of a special material for the R-134a system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
4. Connect the A/C discharge line to the A/C compressor (2).
5. Install the nut (1) that secures the A/C discharge line to the A/C compressor. Tighten the nut to 23 Nm (17 ft. lbs.).
6. Install the turbocharger outlet hose.





7. Connect the A/C discharge line (2) to the condenser jumper line tapping block (4) and install the nut (3). Tighten the nut to 23 Nm (17 ft. lbs.).
8. Connect the wire harness connector to the A/C pressure transducer (1).
9. Reconnect the negative battery cable.
10. Install the air filter housing.
11. Evacuate the refrigerant system Refrigerant System Evacuate.
12. Adjust the refrigerant oil level [1][2]Capacity Specifications.
13. Charge the refrigerant system Refrigerant System Charge.