Compressor Drive Unit, Checking, Replacing

Compressor Drive Unit, Checking, Replacing

- 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
- Check; after tightening threaded connection, drive shaft must engage snugly in splines of drive pinion
- Tightening torque 60 Nm
- Loosening and tightening
- Lubricate drive pinion splines with special grease G 000 100

2. Socket-head bolt
- Tightening torque 10 Nm

3. Drive plate
- With overload safeguard, triggered in the event of excessive torque (e.g. stiff compressor) and drive shaft just free- wheels without driving compressor
- Checking run-out and adjusting

4. Drive plate
- Threaded to compressor drive shaft
- With overload safeguard, triggered in the event of excessive torque (e.g. stiff compressor) and drive shaft just free- wheels without driving compressor
- Tightening torque 30 Nm

5. Rubber element
- Isolates drive unit, damps vibration and sound
- When installing, moisten rubber elements slightly with soap solution for example to provide lubrication

6. Spacing disc
- Genuine spacer must be installed
- Dimensions: 17.5 x 10 x 3 mm

7. Securing ring
- Replace
- Ensure correct positioning (flat side facing compressor)

8. Drive plate
- With rolling bearing
- Clean compressor flange before installing drive plate

9. Compressor
- Different models may be installed depending on engine and country version