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Overview - A/C Compressor Power Unit

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NOTE:

For A/C systems with refrigerant R1234yf, the desiccant bag/dryer cartridge must be replaced each time the refrigerant circuit is opened. Refer to COMPONENTS, REPLACING .

Under certain conditions, the desiccant bag no longer needs to be replaced each time the refrigerant circuit is opened on A/C systems with refrigerant R134a. Refer to Components, Replacing .

The illustration shows one version.

GWWN87-11754Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
  1. A/C Compressor
  2. Seal
    • Replace after removing.
    • There are different versions. Refer to the Parts Information.
    • Coat with refrigerant oil before installing.
  3. High Pressure Side Refrigerant Line
  4. Bolt
    • 22 Nm
  5. Low Pressure Side Refrigerant Line
  6. Seal
    • Replace after removing.
    • There are different versions. Refer to the Parts Information.
    • Coat with refrigerant oil before installing.
  7. Pressure Relief Valve
  8. A/C Compressor Regulator Valve -N280-
    • To check. Refer to Vehicle Diagnostic Tester in the "Guided Fault Finding"  function. Refer to => Wiring Diagram.
  9. Bolt
    • 25 Nm
    • Quantity: 3
  10. Belt Pulley with Overload Protection
  11. Alignment Sleeve
    • Quantity: 2
  12. Oil Drain Plug
    • Denso A/C compressor 30 Nm
    • Mahle/Delphi A/C compressor 20 ± 1 Nm
    • Sanden A/C compressor 15 ± 1 Nm
    • Replace the oil drain plug/seal after removal
    • Only remove on an empty refrigerant circuit.
    • There are different versions. Refer to the Parts Information.