2) 2) OPERATION OPERATION (1) (1) Purpose Purpose The pressure switches are used to visually or audibly warn the driver of the pressure within the system. (2) (2) Make contact / circuit closer Make contact / circuit closer The pressure switch can be fitted in the braking system or directly on one of its components. The system pressure acts on an absorption area within the switch, making an electrical contact as the pressure on that area is increased. The resulting current is used to activate a warning facility, for instance. (3) (3) Break contact / circuit breaker Break contact / circuit breaker The pressure switch can be fitted in the braking system or directly on one of its components.
The system pressure acts on a absorption area within the switch, breaking an electrical contact as the pressure on that area is increased. The current is now broken, e.g. to deactivate a warning facility. (4) (4) Installation requirements Installation requirements No special measures need to be taken. (5) (5) Maintenance of the pressure switch Maintenance of the pressure switch No special maintenance beyond the legal requirements is necessary. When using high-pressure cleaners on the vehicle, please make sure that the water jet is not directed at the pressure switch (corrosion of contacts).
(6) (6) Repair work Repair work When working on the braking system, always make sure that there is absolutely no pressure in the system. Even when the engine is switched off there will be some residual pressure in the system. When doing repair work, make sure your environment is very clean. Immediately close all open ports on the components and on pipes using plugs. For safety reasons the pressure switch needs to be replaced as a whole if damaged. ц ц 4-21