What happens to the self adjuster when the brake is applied?
What happens to the self adjuster when the brake is applied?
When the brakes are applied, the lever cannot move the adjuster screw because the brake pressure is being used to apply the shoes. The adjuster lever mechanism must store the adjustment and turn the notched wheel when the brake is released. There are two types of Bendix/Wagner self-adjusters.
How is the adjuster attached to the secondary shoe?
The adjuster mechanism is attached to the secondary shoe. It is a mechanical device that is made up of the three components. First, an adjusting screw is a threaded device like a nut and bolt. The head of the bolt is a notched wheel with a cylindrical pin. A washer and slotted cap fits over the pin and engages the web section of the secondary shoe.
How do you adjust the self adjuster on a drum?
The process was to tighten the adjuster or eccentric adjusting cam to a point where the shoes contact the drum friction surface and backing off the adjuster or eccentric adjusting cam to where the shoes just cleared the drum. It’s all in the “feel” as you turn the wheel and move the adjuster or eccentric cam.
Where is the adjuster located on a drum brake?
The lever is attached to the secondary shoe at the shoe hold down. A lever return spring is placed between the lever assembly and shoe. A spring connects the primary and secondary shoe to contain the adjuster.
When the brakes are applied, the lever cannot move the adjuster screw because the brake pressure is being used to apply the shoes. The adjuster lever mechanism must store the adjustment and turn the notched wheel when the brake is released. There are two types of Bendix/Wagner self-adjusters.
The adjuster mechanism is attached to the secondary shoe. It is a mechanical device that is made up of the three components. First, an adjusting screw is a threaded device like a nut and bolt. The head of the bolt is a notched wheel with a cylindrical pin. A washer and slotted cap fits over the pin and engages the web section of the secondary shoe.
When do you adjust the drum self adjusters?
Drum brake self adjusters should adjust when reversing and coming to a COMPLETE stop, no rolling then into forward. They only adjust one click each time this happens and if the rear brakes are already adjusted they will not tighten any farther.
What happens if you put the self adjuster on the wrong side?
Don’t forget that there are left and right adjusting screws. If you install one on the wrong side the lever, it will turn the screw the wrong way. In a disc/drum application, the automatic adjusters play an important role in maintaining proper brake balance during the time when the shoes are seating to the drum.
