Removing and installing belt pulley, air conditioner compressor with air conditioning system magnetic clutch N25 — VW

🧭 Before you start

Fits: platform code A33

• Special tools named: V.A.G 1719/1, puller

📋 Procedure

1. Remove front noise insulation. General body repairs, exterior66Noise insulation; Assembly overview - noise insulation
2. Relieve tension on poly V-belt, and remove it 13Cylinder block (pulley end); Removing and installing poly V-belt.
3. Remove sealing cap (A).
4. Use a commercially available hexagon socket wrench to counterhold drive shaft of air conditioner compressor (B), and turn clutch plate (C) in (direction of arrow). [Note: The torque for driving the air conditioner compressor is applied to the compressor shaft via the threaded attachment of the clutch plate (C). If the clutch plate (C) was tightened to the compressor shaft (B) during operation such that it can no longer be loosened (the 7 mm hexagon flats can no longer transmit the necessary torque), the air conditioner compressor must be renewed.] [Note: If the circlip has been removed and the belt pulley (A) cannot be pulled off the air conditioner compressor flange by hand (e.g. due to dirt), carefully pull off belt pulley as described below.If the belt pulley (A) is to be reused, fit the arms of the puller in such a way that the outer side of the belt pulley will not be damaged.]
5. Carefully pull off belt pulley (A) using a puller (B) (with 3 arms). [Note: When pulling off belt pulley (A), do not support the spindle of the puller (B) on the shaft of the air conditioner compressor.Use a sleeve (C) (e.g. sleeve V.A.G 1719/1 from the magnetic clutch pullerV.A.G 1719) to support the spindle of the puller (B) on the air conditioner compressor flange.After the belt pulley (A) has been pulled off, clean the air conditioner compressor thoroughly. It must be possible to push on the belt pulley (A) by hand.] [Note: The clearance must be within the permissible range over the complete circumference.The clearance can also be measured when the air conditioner compressor is installed.If the clearance is outside the permissible range, remove the clutch plate, and adjust the clearance to the specified value by removing or adding spacers.]

6. Remove front noise insulation. General body repairs, exterior66Noise insulation; Assembly overview - noise insulation
7. Relieve tension on poly V-belt, and remove it 13Cylinder block (pulley end); Removing and installing poly V-belt.
8. Use a depth gauge (F) to measure dimension "“1”" between belt pulley (B) and clutch plate (C) at 3 positions on the circumference of clutch plate (C) (note measured values).
9. Apply a voltage of 12 V to 1-pin connector (A).
10. Connect compressor housing (D) to earth.
11. Use a depth gauge (F) to measure dimension "“2”" between belt pulley (B) and clutch plate (C) at 3 positions on the circumference of clutch plate (C) (note measured values).
12. Calculate clearance from dimensions "“1”" and "“2”".

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