A8 Quattro Sedan V8-42L (AKB) (2002) HVAC Compressor Clutch Specs
NOTE: With a tight fitting clutch disc, use commercial two or three-arm puller.
Fig. 3 Installing magnetic coil
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Align tab -A- in recess -B-.
Fig. 4 Checking and adjusting gap
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Measure gap between belt pulley and clutch plate using depth gauge -C- at 3 points. This is measurement -1-.
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Apply 12 V DC to magnetic coil.
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Positive B+ voltage to single pin connector -A
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Ground (-) to A/C compressor housing -B-
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Measure gap again between pulley and clutch disc measured with gauge -C-. This is measurement -2-.
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Difference between two measurements -1- and -2- must be: 0.4 to 0.6 mm (0.016 to 0.024 in.)
NOTE:
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The gap must lie within tolerances around the entire circumference.
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Gap can also be measured with compressor installed.
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If gap dimension lies outside of the permissible range, remove clutch disc and adjust gap dimension by removing or inserting spacer.