OVERVIEW - BELT PULLEY, A/C COMPRESSOR WITH A/C Clutch -N25-

WARNING: This page is about a different car, the 2023 Volkswagen Arteon. However, it is still accessible from the selected car via links, so may be relevant.

If the belt pulley is not available with the A/C Clutch -N25- as an individual part, then the entire A/C compressor must be replaced. Refer to Parts Information.

NOTE:

To remove the belt pulley, it is not necessary to loosen the A/C compressor from the engine. Refer to A/C COMPRESSOR, REMOVING AND INSTALLING FROM BRACKET .

Depending on the A/C compressor type and the engine version, different versions of the belt pulley may be installed (different diameters). Refer to the Parts Information.

Fig 1: Belt Pulley With A/C Clutch -N25- Overview

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Closure Cap
- Not always present
Clutch Plate
- Tightening specification: 30 Nm
- Always replace
  -- Hold the compressor shaft -C- tight and turn the clutch plate counter-clockwise in the direction of the arrow with a suitable tool to remove as it is described for the drive plate on an A/C compressor without an A/C clutch.
- Attached to the A/C compressor input shaft
  -- Clean the contact surfaces on the clutch plate and belt pulley before attaching.
  
  -- Clean the A/C compressor shaft threads before attaching the clutch plate.
  
  -- After tightening, check the gap dimension between the belt pulley and clutch plate and correct it if necessary. Refer to Clutch Plate, Removing and Installing .
  
  NOTE:
  The thread of the new clutch plate has already been greased with a specific amount of a grease by the manufacturer.
- There are different versions. Refer to the Parts Information.
  If the clutch plate is not available as a separate part, then the entire A/C compressor must be replaced. Refer to the Parts Information.
- The overload protection takes over when the torque is excessive (for example, if the A/C compressor runs with resistance) and the belt pulley runs freely without driving the A/C compressor with the A/C Clutch -N25- switched on.
  Removing and installing
Washer
Spacer
- For adjusting the gap dimension between the clutch and belt pulley
- Check the gap dimension. Refer to Gap Dimension Between Belt and Clutch Plate, Checking .
Circlip
- Always replace
- Install on correct side (flat side toward A/C compressor)
- Be careful not to bend the circlip more than necessary when installing it.
  -- Insert the circlip on correct side, the side with beveled insertion edge -A- faces away from A/C compressor (install the flat side facing the A/C compressor).
Belt Pulley
- The belt pulley is sensitive to impact, therefore handle it carefully.
- Clean the flange on the A/C compressor flange before installing the belt pulley.
- There are different versions. Refer to the Parts Information.
- Refer to Belt Pulley, Removing if it is not possible to remove the belt pulley from the flange on the A/C compressor by hand.
  If the belt pulley is not available with the A/C Clutch -N25- as an individual part, then the entire A/C compressor must be replaced. Refer to Parts Information.
Circlip
- Always replace
- install on correct side (flat side toward A/C compressor)
- Be careful not to bend the circlip more than necessary when installing it.
  -- Insert the circlip on correct side, the side with beveled insertion edge -A- faces away from A/C compressor (install the flat side facing the A/C compressor).
Solenoid Coil
- Make sure the bracket for the cable -B- is installed correctly.
- The connector -D- may be attached to the A/C compressor with a bracket, depending on the version.
A/C Compressor
- Different versions may be installed depending on the engine version and the market specific to the vehicle. Refer to the Parts Information.
- Clean the A/C compressor flange before installing the belt pulley.
- Clean the compressor shaft thread and then coat the thread lightly with grease.