RS 4 Quattro Sedan V8-4.2L (BNS) (2007)
Compressor Clutch: Removal and Replacement
Compressor Drive Unit, Checking, Replacing
Compressor Drive Unit, Checking, Replacing
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Replacement involves removing compressor.
NOTE: If drive plate overload safeguard has been triggered, check freedom of movement of compressor before replacing drive unit. Replace
entire compressor if it is stiff.
1. Compressor drive shaft
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Check; after tightening threaded connection, drive shaft must engage snugly in splines of drive pinion.
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Tightening torque 60 Nm
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Loosening and tightening
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Lubricate drive pinion splines with special grease G 000 100
2. Socket-head bolt
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Tightening torque 10 Nm
3. Drive plate
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With overload safeguard, triggered in the event of excessive torque (e.g. stiff compressor) and drive shaft just free-wheels without driving
compressor
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Checking run-out and adjusting
4. Drive plate
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Threaded to compressor drive shaft
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With overload safeguard, triggered in the event of excessive torque (e.g. stiff compressor) and drive shaft just free-wheels without driving
compressor
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Tightening torque 30 Nm
5. Rubber element
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Isolates drive unit, damps vibration and sound
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When installing, moisten rubber elements slightly with soap solution for example to provide lubrication
6. Spacing disc
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Genuine spacer must be installed
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Dimensions: 17.5 x 10 x 3 mm
7. Securing ring