34 00 012 Parking brake function check

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.