Warning lamps, pressure gauge and pressure switch, function

B42.60-0087-04

9.01 Lamps

10.01 Pressure shut-off device

11.02 Double pressure gauge

a Supply pressure

b Control pressure

c Braking pressure

d Electrical drive

Operation

The basic function performed by the components of this group (KO) of the brake system is to alert the vehicle's driver about any possible irregularity on the pneumatic pressure.

The double pressure gauge (11.02) informs the existing pressure on the pneumatic circuit, since the connections 41 and 42 are normally linked to the reservoirs (5.01).

The lamps (9.01), in turn, alert the driver about the:

9.01 (I) - low pressure on the pneumatic system.

9.01 (II) - application of the parking brake.

The lamps (9.01) are linked to the pressure shut-off devices (10.01) which remain with the open contact while the pneumatic pressure is above the threshold. When the pneumatic pressure drops below this value, the pressure shut-off device contact (10.01) closes and the lamps (9.01) are activated.

The pressure shut-off device (10.02) has the role of activating the brake light when the brake pedal valve is applied (28.02).