Audi Workshop Service and Repair Manuals

• Release and tighten bolt -15 Nm
• ◆ Loosening and tightening => Fig.1
• Detach clutch plate
• ◆ Pulling off => Fig.2
• Spacers
• ◆ For adjusting the gap width
• ◆ Checking and adjusting gap width => Fig.4
• Circlip
• ◆ Replace
• ◆ Install on correct side (flat side facing compressor)
• ◆ Ensure correct seating in groove
• Pulley
• ◆ Pull off seized belt pulley, for example with a two- and three-arm puller. Do not damage belt pulley.

• Circlip
• ◆ Replace
• ◆ Install on correct side (flat side facing compressor)
• ◆ Ensure correct seating in groove
• Solenoid
• ◆ With overheating cut-out fitted. It interrupts the solenoid as soon as the magnetic clutch becomes too hot (for example, if the compressor is stiff)
• ◆ The protective diode -J201 previously used is fitted (reduces the voltage peaks which may occur when the magnetic clutch is disengaged)
• ◆ Installing => Fig.3
• Bolt
• Compressor

→ Fig.1    Loosening and tightening hexagon bolt

• ‒ Use a commercially available fabric strap wrench -A- to counterhold at the clutch plate.
• ‒ Tighten bolt to 15 Nm.

→ Fig.2    Detaching clutch plate

• ‒ Carefully prise off the clutch plate with two screwdrivers.

Note:

Use a two-arm or three-arm puller if the clutch plate is seized.

→ Fig.3    Installing solenoid

• ‒ Install the lug -A- in the recess -B-.

→ Fig.4    Checking and adjusting gap width

• ‒ Use a depth gauge -C- to measure dimension "1" between the belt pulley and clutch plate at 3 points.
• ‒ Apply a voltage of 12 V to the solenoid.

•     A -    Positive at 1-way connector
•     B -    Earth at compressor housing

• ‒ Use a depth gauge -C- to measure dimension "2" between the belt pulley and clutch plate at 3 points.
• ‒ Calculate the gap width from the difference between measurements "1" and "2".
• ‒ Specified value: 0.4...0.6 mm

Notes:

• ◆ The gap width must be within the tolerance over the entire periphery.
• ◆ You may also measure the gap width with the compressor fitted.
• ◆ If the gap width is not within the tolerance, remove the clutch plate and set the gap width by removing or inserting spacers.