Forklift Brakes - A brake drum is wherein the friction is provided by the brake shoes or brake pads. The pads or shoes press up against the rotating brake drum. There are some various brake drums kinds together with certain specific differences. A "break drum" would usually refer to when either shoes or pads press onto the inner outside of the drum. A "clasp brake" is the term used to describe if shoes press next to the exterior of the drum. One more type of brake, known as a "band brake" uses a flexible belt or band to wrap all-around the exterior of the drum. Whenever the drum is pinched in between two shoes, it can be known as a "pinch brake drum." Similar to a typical disc brake, these types of brakes are somewhat uncommon.
Early brake drums, prior to 1955, required to be constantly adjusted so as to compensate for wear of the drum and shoe. "Low pedal" can result if the required modifications are not carried out satisfactorily. The vehicle could become dangerous and the brakes can become useless when low pedal is combined with brake fade.
There are some different Self-Adjusting systems meant for braking accessible today. They could be classed into two separate categories, the RAD and RAI. RAI systems are built-in systems that help the apparatus recover from overheating. The most well known RAI manufacturers are Lucas, Bosch, AP and Bendix. The most famous RAD systems consist of Volkswagen, VAG, AP, Bendix and Ford recovery systems.
Self adjusting brakes usually utilize a device which engages just when the vehicle is being stopped from reverse motion. This stopping technique is acceptable for use where all wheels use brake drums. Nearly all vehicles today make use of disc brakes on the front wheels. By operating only in reverse it is less probable that the brakes would be adjusted while hot and the brake drums are expanded. If adapted while hot, "dragging brakes" could occur, which raises fuel consumption and accelerates wear. A ratchet mechanism which becomes engaged as the hand brake is set is another way the self adjusting brakes may function. This means is just appropriate in applications where rear brake drums are used. When the parking or emergency brake actuator lever goes over a certain amount of travel, the ratchet advances an adjuster screw and the brake shoes move in the direction of the drum.
There is a manual adjustment knob situated at the base of the drum. It is typically adjusted via a hole on the opposite side of the wheel and this involves going beneath the forklift together with a flathead screwdriver. It is of utmost importance to move the click wheel properly and modify every wheel equally. If uneven adjustment occurs, the vehicle could pull to one side during heavy braking. The most effective way in order to ensure this tiresome job is accomplished safely is to either lift every wheel off the ground and hand spin it while measuring how much force it takes and feeling if the shoes are dragging, or give each one the exact amount of manual clicks and then do a road test.
Click to Download the pdf