Operations | IW4/IW7 WB/WBV |
3.5.3Maximum Brake Force Test
On test stands with brake force application limiter (optional), the motors switch off automatically if the brake pedal was depressed too fast, and/or the brake force application limiter warning lamp lights up. In this case the vehicle must be braked until the wheels block or, if this is not possible, the vehicle must exit the roller set. Once the
!Depress brake pedal completely. Depress brake pedal slowly and evenly.
!Observe the instruments on the display panel
Observe the pointer instruments on the display cabinet. The pointers of the brake forces should move forward corresponding to the applied pedal force.
!Terminate the measurement
As soon as one wheel has reached a slip of 30%, both rollers will be switched off. Now the maximum brake force has been reached. This value will be displayed by the needles until the motors are restarted (needle stop). Should the motor not switch off inspite of maximum pedal force, the brake force reached at maximum pedal force is the maximum brake force.
On test stands equipped with a brake force application limiter (optional) the red "Application limiter" lamp will be lit if the brake pedal is depressed too fast. In this case the test will have to be repeated.
The ratio of maximum brake force of the service brake to the weight of the vehicle should not be less than the legally permissable min. brake force!
Never drive a driven axle from the roller set unless both motors are running and the yellow ready lamp is lit. This could lead to serious damage to the electrical and mechanical system of the test stand!
Brake Test
Fig. 3-8: Running a Brake Test
24 | D1 |