Gap Dimension Between Belt And Clutch Plate, Checking

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NOTE:

The Gap Dimension Must Be Within The Permissible Range Over The Entire Circumference.

Gap Dimension May Also Be Measured With A/C Compressor Installed.

If The Gap Dimension Is Outside Of The Permissible Range, First Remove The Clutch Plate And Then Remove Or Insert Spacers To Get To Attain The Correct Dimension.

-- Turn Off The Ignition.

-- Perform The Preliminary Work As For Replacing The Belt Pulley. Refer To PRELIMINARY WORK FOR REPLACING BELT PULLEY .

Tighten The Clutch Plate -C- On The A/C Compressor Shaft -E- To 30 Nm.

Fig 1: Identifying A/C Compressor Belt Pulley And Clutch Plate Gap, Checking
Courtesy of AUDI OF AMERICA, LLC

-- Measure The Dimension "1" Between The Belt Pulley -B- And The Clutch Plate -C- With A Depth Gauge -F- At Three Places On The Clutch Plate -C- Circumference And Then Write Down The Measured Values.

-- Apply 12 Volts To The 1-Pin Connector -A-.

-- Connect The Ground To The Compressor Housing -D-.

-- Measure The Dimension "2" Between The Belt Pulley -B- And The Clutch Plate -C- With A Depth Gauge -F- At Three Places On The Clutch Plate -C- Circumference And Then Write Down The Measured Values.

-- Calculate The Gap Dimension Using Dimensions "1" And "2".

Gap Dimension Specified Value: 0.4 To 0.6 Mm (Up To 0.8 Mm On An A/C Clutch Already Used).