Parking Brake System: Testing and Inspection

34 00 012 - Parking brake function check





Note:
If deviations are identified during the following check, the parking brake must be adjusted:

Drive vehicle onto chassis dynamometer.
Warm up brakes.
Check handbrake.
0th tooth (handbrake released): -
Vehicles with manual transmission: Shift lever in neutral position.
Vehicles with automatic transmission: Selector lever in "N" position.
- Without locking differential ≤ 150 N.
- With locking differential ≤ 200 N (possibly odd display).
1st tooth: - No increase in braking force with regard to 0th tooth. Indicator lamp can be lit.
2nd tooth: - Indicator lamp must be lit.
3rd tooth: - Increase in braking force.
5th tooth: - The brake force display must have reached ≥ 400 N.
Checking brake force differential at wheel:
Apply handbrake until a wheel circumferential force (measured on brake test stand) of min. 1000 N is reached.
Max. permitted brake force differential right/left ≤ 35% (referred to greater brake value).
It must be possible to brake with locked wheels with the handbrake.