AR42.15-B-0010B | Remove/install automatic linkage adjuster | 12.02.16 |
Vehicle 688.156, 688.177
Vehicle 979.02, 979.07, 979.09, 979.27
B42.15-0031-12
1 Combined cylinder
2 Fork
3 Smaller pin
4 Larger pin
5 Retractible plug
6 Manual adjustment nut
7 Automatic brake adjuster
| Remove | ||
1 | Compress and lock the membrane cylinder spring (1) to ensure that the brake is totally released | Certify that there is no air pressure in the service chamber. | |
2 | Use a screwdriver to push away the catch of the retractible plug (5) and of the dented portion of the actuator | If the plug is not removed or pushed away together with the catch, the catch will damage the actuator teeth when the manual adjustment nut is turned. | |
3 | Remove the two pins from the fork (3 and 4) together with their counter pins. | ||
4 | Use a key to turn the manual adjustment nut (6) and push the adjuster away from the fork | ||
Use an adequate tool. | |||
5 | Remove the expander ring and washers from the expansion shaft and remove the adjuster | ||
| Install | ||
1 | Install the adjuster (7) on shaft “S” CAM | ||
2 | Install the spacing washers and the expander ring until the maximum clearance of 1.5 mm is achieved between the washer and the expander ring | ||
3 | Use a screwdriver to push away the actuator catch (5) | ||
4 | Turn the manual adjustment nut (6) to align the adjuster (7) with the fork (2) | ||
5 | Install pins (3 and 4) and the counter pins |
Drum brake
Número | Denominação | Vehicle 688.156 with rear axle 743.415 | Veículo 688.177 with rear axle 743.439 | |||
BE42.10-B-1002-12C | Axial clearance of expanding axle | mm | 1.5 | 1.5 | ||
Test values for mechanical system