Disk brake example |
010 | Vernier caliper |
1 | Brake disk |
2 | Crack length |
P42.10-2758-11
Warning | Risk of injury. Skin or eye injuries may result when handling hot or glowing objects. | Wear protective gloves, protective clothing and safety glasses, if necessary. | |
Topical note | Notes on repairs to brake system | ||
| Remove | ||
1 | Remove wheels | ||
| |||
| Check | ||
2 | Check brake disks (1) on front and rear axle for score marks and cracks | Cracks can occur due to high stress. | |
Brake disks (1) must be replaced for a crack length (x) > 25 mm, gaping cracks or score marks deeper than 0.5 mm or pitted corrosion or deeply contoured ridging at the outer edge. | |||
For gaping cracks or score marks deeper than 0.5 mm or pitted corrosion or deeply contoured ridging at the outer edge: | |||
| |||
Replace brake disks (1) on each axle, subject to separate repair order. | |||
| Remove/install front axle brake disk | ||
| Remove/install rear axle brake disk | ||
| Measure | ||
3 | Measure thickness of brake disks on front and rear axles using caliper gauge (010) | Brake disk thickness | |
Brake disk thickness | |||
Caliper gauge | |||
Observe recommended limit dimensions. If the wear limit has been exceeded or will be exceeded before the next brake pad change: | |||
| |||
Replace brake disks (1) on each axle, subject to separate repair order. | |||
| Remove/install front axle brake disk | ||
| Remove/install rear axle brake disk | ||
| Install | ||
4 | Mount wheels | ||
|
Check values for front axle brake disks |
Number | Designation | Model 447, 448 | Model 447, 448 | ||
BE42.10-N-1001-08H | Brake disk thickness | Thickness when new | mm | 28 | 32 |
Wear limit | mm | 25 | 28 | ||
Lateral runout (max.) | mm | 0,01 | 0,01 | ||
Axial runout (max.) | mm | 0,04 | 0,04 | ||
Outside diameter | mm | 300 | 330 |
140 589 00 19 00
Caliper gauge