Overview - A/C Compressor Power Unit, Vehicles With 8-Cylinder Engine

WARNING: This page is about a different variant/trim than selected.

NOTE:

If the drive plate overload protection triggers, check the A/C compressor for ease of motion before replacing the drive unit. If the A/C compressor creates friction, replace it completely.

Fig 1: A/C Compressor Drive Unit Overview

Courtesy of AUDI OF AMERICA, LLC

1 -A/C Compressor Input Shaft
- Tightening specification: 60 Nm
- The input shaft must be seated free of play in splines of engine drive wheel with thread tightened. For checking. Refer to A/C COMPRESSOR INPUT SHAFT, REMOVING AND INSTALLING .
- Loosening and tightening. Refer to A/C COMPRESSOR INPUT SHAFT, LOOSENING AND TIGHTENING .
- Removing and installing. Refer to A/C COMPRESSOR INPUT SHAFT, REMOVING AND INSTALLING .
- Grease the splines for the engine drive wheel with Grease:G 000 100 for example. Refer to the Parts Information.
2 -Hex Socket Bolt
- Tightening specification: 10 Nm
3 -Drive Plate
- The overload protection takes over when the torque is excessive (for example, if the A/C compressor runs with resistance) and the input shaft runs freely without driving the A/C compressor.
- Run-out, checking and adjusting. Refer to DRIVE PLATE WITH OVERLOAD PROTECTION, CHECKING RUN-OUT AND ADJUSTING .
- Removing and installing. Refer to DRIVE PLATE WITH OVERLOAD PROTECTION, REMOVING AND INSTALLING .
4 -Drive Plate
- Tightening specification: 30 Nm
- Attached to the A/C compressor input shaft
- The overload protection takes over when the torque is excessive (for example, if the A/C compressor runs with resistance) and the input shaft runs freely without driving the A/C compressor.
- Removing and installing. Refer to A/C COMPRESSOR DRIVE PLATE, REMOVING AND INSTALLING .
5 -Rubber Element
- When the drive unit de-couples, the vibrations and noises are dampened.
- When installing, coat the rubber elements B lightly using soapy water (as a lubricant).
- Removing and installing. Refer to A/C COMPRESSOR DRIVE PLATE, REMOVING AND INSTALLING .
6 -Spacer
- The original disc must be installed
- Dimensions: 17.5 x 10 x 3 mm
7 -Circlip
- Replace
- Install on correct side (flat side toward A/C compressor)
- Removing and installing. Refer to DRIVE PLATE WITH ANTI-FRICTION BEARING, REMOVING AND INSTALLING .
8 -Drive Plate
- With roller bearing.
- Removing and installing. Refer to DRIVE PLATE WITH ANTI-FRICTION BEARING, REMOVING AND INSTALLING .
- Clean the A/C compressor flange before installing the drive plate.
9 -A/C Compressor
- Different versions may be installed, depending on engine version and country version of vehicle. Refer to the Parts Information
  NOTE:
  There are different versions depending on the refrigerant (R134a or R1234yf). Refer to the Parts Information.