| Brake booster gear ratio (i) |
|
Factor |
5.5 |
|
|
| Brake disc diameter, front |
|
Diameter |
350 mm |
|
|
| Brake disc diameter, rear |
|
Diameter |
350 mm |
|
|
| Effective brake disc diameter, front |
|
Diameter |
286, 6 mm |
|
|
| Effective brake disc diameter, rear |
|
Diameter |
292 mm |
|
|
| Piston diameter in front brake calliper |
|
Diameter |
30/32/34 mm |
|
|
| Piston diameter in rear brake calliper |
|
Diameter |
28/30 mm |
|
|
| Effective brake pad area per wheel, front |
|
Area |
212 cm2 |
|
|
| Effective brake pad area per wheel, rear |
|
Area |
124 cm2 |
|
|
| Pad thickness, front |
All |
Measured value |
9.4 mm |
|
|
| Pad thickness, front (wear limit) |
All |
Measured value |
2 mm |
|
|
| Pad thickness, rear |
All |
Measured value |
11.2 mm |
|
|
| Pad thickness, rear (wear limit) |
All |
Measured value |
2 mm |
|
|
| Brake disc thickness, new (front) |
All |
Measured value |
34 mm |
|
|
| Brake disc thickness, new (rear) |
All |
Measured value |
28 mm |
|
|
| Brake disc wear limit, front |
Minimum brake disc thickness (wear limit) is stamped on the brake disc hub. Example: Min. Th.33.7 mm |
Measured value |
(Read off value on brake disc hub) X.XX mm |
|
|
| Brake disc wear limit, rear |
Minimum brake disc thickness (wear limit) is stamped on the brake disc hub. Example: Min. Th.27.7 mm |
Measured value |
(Read off value on brake disc hub) X.XX mm |
|
|
| Wear limit: Surface changes in front and rear brake discs |
Wear limit: Connected surface fracture > 1 cm2
and/or surface roughness of brake disc > 80 micrometer. Replace PCCB brake discs on both sides of the axle. |
Surface changes |
Values and procedure for: 46 51 02 Checking PCCB brake discs/46 54 02 Checking rear PCCB brake discs. |
|
|
| Thickness tolerance of brake discs (max.) |
All |
Measured value |
0.02 mm |
|
|
| Lateral runout of brake disc (max.) |
All |
Measured value |
0.03 mm |
|
|
| Lateral runout of wheel hub (max.) |
All |
Measured value |
0.03 mm |
|
|
| Lateral runout of brake disc when installed (max.) |
All |
Measured value |
0.06 mm |
|
|
| Push rod play |
Measured at brake pedal plate |
Measured value |
approx. 1 mm |
|
|
| Diameter of parking-brake drum |
Parking brake (electrically actuated, drum brake acting on the rear axle) |
Diameter |
180 mm |
|
|
| Diameter of parking-brake drum (wear limit) |
All |
Diameter |
181 mm |
|
|
| Width of parking-brake shoe |
All |
Measured value |
24 mm |
|
|