Check rear brake disc
Check
- Check surface and thickness of brake discs.
Result
» Brake disc thickness has fallen below the minimum.
Scoring, heat cracks or thickness differences are present.
Measure
- Replace brake discs.
See: 34 21 320 Removing and installing/replacing both BRAKE DISCS
Measure minimum brake disc thickness (rear brake)
- Check minimum brake disc thickness:
Place the special tool 0 495 451 (34 1 280) at three measuring points in area (1) and measure.
Compare measurement result and lowest value with setpoint value.
New brake pads may only be installed if the brake disk thickness is greater than the minimum brake disc thickness.
TECHNICAL DATA - BRAKE DISC THICKNESS SPECIFICATION
| Minimum brake disc thickness MIN TH (nominal dimension 330x20) | ||
|---|---|---|
| Minimum brake disc thickness MIN TH (brake disc 330x20) | 18.4 mm | |
TECHNICAL DATA - BRAKE DISC THICKNESS SPECIFICATION
| Minimum brake disc thickness MIN TH (nominal dimension 345x24) | ||
|---|---|---|
| Minimum brake disc thickness MIN TH (brake disc 345x24) | 22.4 mm | |
TECHNICAL DATA - BRAKE DISC THICKNESS SPECIFICATION
| Minimum brake disc thickness MIN TH (nominal dimension 370x24) | ||
|---|---|---|
| Minimum brake disc thickness MIN TH (brake disc 370x24) | 22.4 mm | |