OVERVIEW - BELT PULLEY, "Denso" A/C COMPRESSOR, VERSION "1"

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A/C compressor without A/C Clutch -N25-

NOTE:

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

To remove the pulley, it is not necessary to loosen the A/C compressor from the engine. Refer to A/C COMPRESSOR, REMOVING AND INSTALLING ON BRACKET . Depending on the engine type, it may be necessary to loosen the lock carrier from the vehicle and to pull it slightly forward (to make space). Refer to SERVICE POSITION, PERFORMING AND RESETTING .

Different versions of the belt pulley (with different diameters) may be installed, depending on A/C compressor construction type and engine version.

As a replacement part, the belt pulley with the drive plate and the cap is available under one part number. The belt pulley and the drive plate are held together with one bolt (when the bolt is no longer needed, dispose of it). When the bolt was manufactured, a predetermined amount of a specific grease was applied to the threads in the drive plate; this amount is sufficient for bolting the drive plate to the compressor one time (a drive plate, which has been removed, cannot be reused).

Belt pulley, removing and installing. Refer to BELT PULLEY, REMOVING AND INSTALLING, "Denso" A/C COMPRESSOR, VERSION "1" .

Fig 1: Overview Of Belt Pulley, "Denso" A/C Compressor - Version 1

Courtesy of AUDI OF AMERICA, LLC

Sealing Cap
Drive Plate
- Tightening specification: 30 Nm
- Replace
- Bolted with the A/C compressor input shaft, clean the compressor shaft thread before mounting the drive plate.
  NOTE:
  The thread of the new drive plate has already been greased with a specific amount of a grease by the manufacturer.
- There are different versions. Allocate correct version.
- 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 rubber elements for decoupling belt pulley from A/C compressor input, dampens rations and noise
- For installation, lightly coat rubber elements, for example with tire mounting paste or a soap solution (as a lubricant)
- Removing and installing. Refer to BELT PULLEY, REMOVING AND INSTALLING, "Denso" A/C COMPRESSOR, VERSION "1" .
Circlip
- Replace
- Install on correct side (flat side toward A/C compressor)
- Removing and installing. Refer to BELT PULLEY, REMOVING AND INSTALLING, "Denso" A/C COMPRESSOR, VERSION "1" .
Belt Pulley
- The belt pulley is made of plastic and is sensitive to impact, therefore take special care when handling it.
- There are different versions (depending, for example, on the type of engine) .
- Removing and installing. Refer to BELT PULLEY, REMOVING AND INSTALLING, "Denso" A/C COMPRESSOR, VERSION "1" .
A/C Compressor
- Depending on engine version and the market, different versions may be installed.
- Clean the A/C compressor flange before installing the pulley.
- Clean the compressor shaft thread and then coat the thread lightly with grease.