Warning lamps, pressure gauge and pressure switch, function

B42.60-0166-04

9.01 Lamps

10.01 Pressure switches

11.02 Double pressure gauge

a Supply pressure

b Control pressure

d Electrical drive

Operation

The basic task executed by the components of this set (KO) of the brake system is to warn the vehicle driver of any possible irregularity on the pneumatic pressure.

The double pressure gauge (11.02) informs the existing pressure in the pneumatic circuit, because connections 41 e 42 are commonly linked to the tanks (5.01).

The lamps (9.01), on the other hand, warn the driver of:

9.01 (I) - application of the parking brake.

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

The lamps (9.01) are linked to the pressure switches (10.01), which remain with an open contact as long as the pneumatic pressure is above a limit value. When the pneumatic pressure drops below this value, the pressure switch contact (10.01) closes and the lamps (9.01) are activated.