Brake test

AP42.00-P-4290G

Brake test

06.02.2019

Model

460, 461

Model

463

up to model year 2019

Prepare brake test

1

Switch off the differential lock.

2

Switch off all-wheel drive.

Vehicle with manually selectable four wheel drive.

General brake test (Only applies for countries without a specified brake test on the brake test stand)

3

Check braking behavior of service brake when driving.


It must be ensured that the brake test when driving is performed as per the country-specific legislation and regulations.
Otherwise, people may be injured or there may be damage to material and the environment.

 Press brake pedal uniformly.

In event of braking deceleration fluctuations or a pulsating brake pedal,



determine cause and correct.

 After obtaining special order.

In event of any difference in service brake performance on wheels on a single axle,



check and correct tire pressure.

 After obtaining special order.

If the service brake performance difference remains even after repeat brake test on the wheels on a single axle,



determine cause and correct.

 After obtaining special order.

If locking limit is not reached,



check whether the brake values still comply with the legal regulations.

 After obtaining special order.

If the specified minimum requirements and tolerance limits for the brake system are not fulfilled in accordance with the country-specific legislation,



determine cause and correct.

 After obtaining special order.

4

Check braking behavior and actuating travel of service brake when driving.


It must be ensured that the brake test when driving is performed as per the country-specific legislation and regulations.
Otherwise, people may be injured or there may be damage to material and the environment.

 Operate parking brake lever evenly.

Number of notches by which the hand brake has to be adjusted, if until then there is no adequate braking effect

*BE42.20-P-1002-02A

If an insufficient braking effect, brake deceleration fluctuations or a pulsating operation occurs,



determine cause and correct.

 After obtaining special order.

If locking limit is not reached,



check whether the brake values still comply with the legal regulations.

 After obtaining special order.

If the specified minimum requirements and tolerance limits for the brake system are not fulfilled in accordance with the country-specific legislation,



determine cause and correct.

 After obtaining special order.

Brake test on brake test stand

 Danger

Risk of death caused by limbs being caught or crushed by rotating parts when performing tests on the brake test stand

Never leave the vehicle unattended on the rollers except in an emergency. Ensure that no one is under the vehicle or near rotating parts during testing. In case of emergency, use the EMERGENCY OFF switch to shut down test stand.

AS42.00-Z-0001-01A

5

Move vehicle with front axle onto roller brake test stand.



000 588 05 21 00 Roller brake test stand

WS42.00-P-0006B

6

Move automatic transmission to selector lever position "N" or shift manual transmission to neutral.

With transmission 722, 725.0

7

Determine and document the front axle braking characteristics and brake values.


The speed of the roller brake test stand rollers be a max. of 5 km/h and may not last longer than 10 s for each axle test.
Between the tests, a waiting period of at least 15 s must be observed, during which the axle may not be driven by the roller brake test stand rollers.
The drive train and brake system can otherwise be damaged.

 Press brake pedal uniformly. The maximum value prior to the wheels locking up is to be documented.

8

Move rear axle of vehicle into roller brake test stand.



000 588 05 21 00 Roller brake test stand

WS42.00-P-0006B

9

Move automatic transmission to selector lever position "N" or shift manual transmission to neutral.

With transmission 722, 725.0

10

Determine and document the rear axle braking characteristics and brake values.


The speed of the roller brake test stand rollers be a max. of 5 km/h and may not last longer than 10 s for each axle test.
Between the tests, a waiting period of at least 15 s must be observed, during which the axle may not be driven by the roller brake test stand rollers.
The drive train and brake system can otherwise be damaged.

 Press brake pedal uniformly. The maximum value prior to the wheels locking up is to be documented.

11

Determine and document braking response, brake values and actuating travel of parking brake.

 Operate parking brake evenly. The maximum values prior to the wheels locking up are to be documented.

12

Release parking brake and drive vehicle out of roller brake test stand.

13

Evaluate braking characteristics and documented brake values of service brake.

Notes on the evaluating and interpreting brake tests on test stands

AH42.00-N-0004-01S

If there are brake value fluctuations or a pulsating brake pedal or if the difference in the braking effect of the wheels on an axle is more than 25 % of the highest value,



determine cause and correct.

 After obtaining special order.

If locking limit is not reached,



check whether the brake values still comply with the legal regulations.

 After obtaining special order.

 The stated deviation applies for the Federal Republic of Germany; differently phrased country-specific regulations must be observed accordingly.

14

Evaluate braking characteristics and documented brake values of parking brake.

Notes on the evaluating and interpreting brake tests on test stands

AH42.00-N-0004-01S

Number of notches by which the hand brake has to be adjusted, if until then there is no adequate braking effect

*BE42.20-P-1002-02A

If there are brake value fluctuations, pulsating operation or if the difference in the braking effect of the parking brake at the wheels of one axle is more than 50 % of the highest value,



determine cause and correct.

 After obtaining special order.

If locking limit is not reached,



check whether the brake values still comply with the legal regulations.

 After obtaining special order.

 The stated deviation applies for the Federal Republic of Germany; differently phrased country-specific regulations must be observed accordingly.

Adjustment values for parking brake during maintenance operations

Number

Designation

Model 460, 461
Model 463
up to model year 2019

BE42.20-P-1002-02A

Number of notches by which the hand brake has to be adjusted, if until then there is no adequate braking effect

Anzahl

4