The adjustment arm, also known as the brake gap adjustment arm, mainly functions to adjust the brake gap of the brake.
In the process of braking, the brake element will wear continuously, and the gap between the brake drum and the brake shoe will also increase to different degrees, resulting in the formation of overly tall pedal, brake chamber thrust decline, resulting in braking lag, braking force decline, wheel deviation, vehicle tail rejection and even brake failure and other problems.
In order to ensure driving safety, maintain the stability of the brake pedal stroke and the balance between the brakes, the brake gap needs to be adjusted continuously.
Automatic adjustment arm refers to a vehicle adjustment arm that can be automatically adjusted according to the wear of brake shoes and brake drum to ensure that the brake drum and brake shoes are constantly in the set optimal clearance.
In simple terms, the working principle is that the brake gap value is set at the time of design. If the gap is exceeded in the process of use, the self-adjusting arm will drive the internal one-way clutch to reduce the gap value when the brake returns to the position, so that the brake gap is always kept in the preset range.
Compared with the manual adjustment arm, the automatic adjustment arm has the advantages of excellent consistency of brake gap adjustment, short braking stroke, large torque, stable effect, less gas consumption and no manual intervention. It has been the standard configuration of Semi Trailer Manufacturers in Europe and America more than ten years ago.
Then, the use of automatic adjustment arm of the vehicle, can manually adjust the brake gap? In other words, can the automatic adjustment arm be used as a manual adjustment arm?
If the worm bolt on the self-adjusting arm is turned by the wrench, the brake clearance can be adjusted. But in general, it is not recommended that owners do so, because manual adjustment is extremely damaging to the internal mechanical structure of the self-adjusting arm, and manual adjustment several times may lead to the damage of the transmission mechanism.
In addition, some owners ask whether the control arm of the self-adjusting arm can be removed and then used as the self-adjusting arm, which is also not possible, because the most common cause of damage to the adjusting arm is the failure of locking and can not play the role of fixing the gap. If the control arm is removed, the internal mechanism of the automatic adjusting arm will not be able to meet the self-locking condition. When the vehicle brakes, the internal mechanism of the self-adjusting arm will rotate, and the braking gap will become larger and larger over time, which will eventually lead to the brake failure.
It is worth noting that the matching on different models of vehicles can arm is difference, especially the brake clearance of presupposition. The owner had better not do STH without authorization to be modified, otherwise it may cause the brake clearance to be too large or too tiny. If you want to switch, suggest confirming excellent self-adjustable arm model, it is best to use the original factory accessories.
In terms of maintenance and maintenance, the self-regulating arm is relatively simple. Under normal circumstances, it is checked every three months, and greased every twenty thousand kilometers or every six months.