Ignore any brake imbalance on an axle if the lower force recorded is due to a locked wheel or if the higher braking force of a wheel does not exceed 40 kg. A brake pedal rubber is a non-slip material and is therefore not considered a defect if worn smoothly. An electronic parking brake (ILL) can be activated automatically under certain conditions, such as when the ignition is switched off or the driver`s door is open. Testers should be aware of this throughout the test. Some brake pads have metal wear indicators, so if the pads become excessively worn, the metal indicator will touch the disc and make a grinding noise. Other pads may have a cut that, if worn, indicates that the pad needs to be replaced. Gradually release the service brake and observe how the braking force on each wheel decreases. An inclination test shall only be carried out on vehicles which are not suitable for a parking brake test with the primary brake tester or deceleration meter. This will normally only be necessary for certain all-wheel drive vehicles equipped with electronic parking brakes for which no technical information is available. Empty the container completely by pressing the service brake pedal several times. Record the measured value from which the maximum braking force is reached and indicate whether the brake is locked.
Stop the rollers if they have not been stopped automatically. If a vehicle fails any aspect of the plate brake test, the check shall be repeated to confirm the result. It is sufficient to inspect vehicles whose parking braking system has not yet been tested as a secondary brake. Vehicles equipped with a single-line braking system shall meet the following minimum secondary brake performance requirements: Large vehicles equipped with spring brakes, actuators or compressed-air brakes may require a brake test to evaluate the performance of the parking brake. This test shall only be carried out on an approved Class 5 roller brake test with the appropriate brake test programme applied. Apply the parking brake completely, then activate the bracket. The service brake can be used to help adjust the parking brake. Place the wheels of the next axle in the brake rollers and repeat the above process.
Vehicles of categories M2 and M3 which were first used before 1. January 1968 and having a service brake that works on at least 4 wheels, have no specified requirements for parking brake effectiveness. However, they must have a parking brake that can prevent at least two wheels from turning. For definitions of vehicle categories, see “Abbreviations and definitions” in the introduction. Duel braking systems consist of two hydraulic systems, they can be divided from front to rear, diagonally or like the classic Range Rover and Disco 1, the rear axles and part of the fronts, then the rest of the fronts. These are called primary and secondary circuits. For most vehicles, the TÜV inspection service automatically calculates braking efficiency. The braking system is subject to two detailed checks. One will be an inspection of the physical components of the brakes. The other will be a test to determine braking performance. The TÜV inspector checks that the brake pedal does not have suspension travel and excessive clearance during assembly.
It then checks the wear of the individual brake components. and leaks. These include brake boosters, master cylinders, brake lines and mechanical brake components. Then they tested the handbrake in the same way. Now, I felt like as a transmission brake, you were never meant to pull the handbrake when traveling at any speed. Fortunately (?) my handbrake has no effect. I questioned this procedure as potentially dangerous, but they claim they are instructed to test 4×4 handbrakes by applying them at 10 miles per hour. Enter the braking force of each wheel and whether they “lock”. The TÜV inspection service automatically calculates braking efficiency and unbalanced results (the alternative is a “slope test”). You only need to achieve 16% efficiency.
The deceleration brake test shall always be carried out on suitable roads with as little traffic as possible. A particular public road should not be used for testing so frequently that it could lead to complaints from local residents. During the first test, just before the plate wheels have high-friction surfaces, apply gentle constant pressure to the brake pedal. Don`t stop at the tester. Notice how the braking force fluctuates. Repairs to hydraulic brake system pressure lines are not acceptable without proper plugs. Compression joints of a type with separate ferrules are not suitable. A brake disc or drum must be worn significantly before it is rejected. Wearing below the manufacturer`s recommended limits is not in itself a reason. Condition, operation and performance. Suitable vehicles are tested on a roller brake tester.
Vehicles such as those equipped with permanent 4-wheel drive shall be tested either on a suitable road with a properly calibrated and maintained brake gauge or, if installed on the dynamometer, a plate brake tester. Braking system Gradually press the service brake again, this time until maximum force is reached or until the wheel locks and slides on the rollers. Stop the rollers. Divide the weight of the vehicle by the total braking force, then multiply the number by 100 to get the percentage of braking effectiveness. No, not just a parking brake. The law prescribes a scondary braking system that can be actuated in the event of failure of the primary system while driving.