34 10 014 Adjusting handbrake
Perform inspection in the following manner:
When 1st ratchet is engaged, no braking force should be exerted.
The difference in wheel circumferential forces between the left and right wheels may deviate by max. 30 % from the greater value (measured on brake test stand).
In event of larger deviations of wheel circumferential force: readjust parking brake.
Braking with locked wheels must be possible with the parking brake.
The parking brake must be reset if the actuation stroke is greater than 6 teeth.
Basic setting of the parking brake is required:
- In event of excessive actuation stroke (6 teeth).
- When replacing parking brake Bowden cables
- When replacing parking brake lever
Adjusting instructions for parking brake Bowden cables
Release the gaiter (1) of the parking brake lever from the clips.
Release self-locking nut (2) until the load on the Bowden cable has been relieved completely.
Screw in adjusting nut on parking brake lever until a gap (A) of 0.5-1.5 mm between parking brake lever (2) and stop (1) is set at brake calipers.
- Release adjusting nut on parking brake lever completely.
- Adjust adjusting nut on parking brake lever as shown above.
- Apply parking brake lever three times.
- Press brake pedal to floor at least three times so that air gap can be set.
- Carry out function check
Checking adjustment on brake test stand
0th tooth (parking brake released):
Vehicles with manual transmission: Shift lever in neutral position.
Vehicles with automatic transmission: Selector lever position "N" wheel circumferential force ≤100 N.
1st tooth:
No brake force increase with regard to the 0th tooth. Indicator light may light up.
2nd tooth:
An increase in braking force must take place. Indicator lamp must be lit.
3rd tooth:
Increase in braking force.
4th tooth:
Wheel circumferential force per wheel: 700 N to 1300 N.
(Must be achieved in the 4th tooth at the latest)