Cylinder rod travel |
B42.10-0010-01
B42.10-0286-01
| Check | ||
Service brake | |||
Warning | Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | |
1 | Run the engine until you obtain the brake pneumatic system working pressure | .Operating pressure | |
2 | Chock the wheels and release the parking brake | ||
3 | Fully actuate the service brake with the help of another person | ||
4 | Measure the cylinder rod travel (a) | If the travel (a) of at least one-cylinder rod exceeds the established value, adjust the clearance of the brake shoes. | |
.Cylinder rod travel | |||
5.1 | Adjust the brake shoes clearance | Only vehicles with brake mechanical adjuster. | |
| Adjust play of drum brake | . | |
In the vehicles that operate under sever conditions, it is recommended to carry out the adjustment of the brake shoes before checking the travel of the cylinders rods travel. | |||
.Clearance between the brakepad and brake drum | |||
.Operating pressure | |||
5.2 | Check brake linings and pads for wear | Before adjusting the shoes check the linings wear. | |
Check brake lining thickness. | |||
6.1 | Check the automatic brake adjuster | Only for vehicles with automatic brake adjuster. | |
| Checking adjuster | . | |
Vehicles fitted with automatic brake lash adjusters do not require periodic adjustment. In the case the cylinders' rods travel exceeds the prescribed value, the operation and installation of the brake automatic regulator must be checked. | |||
6.2 | Measure the cylinder rod travel | Only for vehicles with automatic brake adjuster. | |
Automatic brake adjusters - Checking wheel cylinder release travel. | |||
Parking brake | |||
7 | Apply the parking brake | The control light in dashboard must light-up when applying the parking brake. | |
The parking brake operates in the service brake mechanism and does not require an individual adjustment. Apply the brake and check the rear axle brake cylinder rods for uniform displacement. | |||
8 | Actuate many times the service brake | When the brake system's pneumatic pressure falls below 5.5 bar, the control light has to come on. | |
When depressing the service brake, the peculiar pneumatic resistance must be felt. |