Assess Condition Of Brake Disks - AP42.10-S-4256E
Model 447, 448
| Notice | General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment | Model 447 with engine 780 | AH00.00-Z-0300-01A |
| Notice | Notes on evaluating brake disks | AH42.10-D-9406-07KOP | |
| Check | |||
| 1 | Check all brake disks (1) on front and rear axle through opening on wheel disk and from the vehicle underside. | If crack lengths > 25 mm, gaping cracks, score marks deeper than 0.5 mm, pitted corrosion or deeply contoured ridging are present at the outer edge, ↓ replace brake disks (1) per axle. |
|
| Remove/install front axle brake disk | AR42.10-S-0230E | ||
| Remove/install rear axle brake disk | AR42.10-S-0240E | ||
If brake disks (1) are soiled with oil or grease, ↓ clean or replace brake disks (1). If it is not possible to check the brake disks (1) through the opening on the wheel disk or from the vehicle underside, ↓ Remove wheels and perform check again. |
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| Measure | |||
| 2 | Remove wheels. | ||
| AR40.10-S-1100E | |||
| 3 | Measure brake disk thickness. | *BE42.10-Z-1001-08KOH | |
| *BE42.10-Z-1001-09KOB | |||
If the wear limit is reached or exceeded, |
Fig 1 | ||
| ↓ replace brake disks (1) per axle. Remove/install front axle brake disk |
AR42.10-S-0230E | ||
| Remove/install rear axle brake disk |
AR42.10-S-0240E |
CHECK VALUES FOR FRONT AXLE BRAKE DISKS
| Number | Designation | Model 447, 448 With 16" brake system | Model 447, 448 with 17" brake system | ||
|---|---|---|---|---|---|
| BE42.10-Z-1001-08KOH | 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 | ||
| Measure outside diameter | mm | 300 | 330 | ||
CHECK VALUES FOR REAR AXLE BRAKE DISKS
| Number | Designation | Model 447, 448 | ||
|---|---|---|---|---|
| BE42.10-Z-1001-09KOB | Brake disk thickness | New | mm | 12 |
| Wear limit | mm | 9 | ||
| Max. lateral runout | mm | ≤ 0, 01 | ||
| Max. axial runout | mm | ≤ 0, 04 | ||
| Repair limit dimension | mm | - | ||