Common faults and troubleshooting of tongs disc br

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With the rapid development of highway engineering construction and the gradual improvement of the degree of maintenance mechanization, more and more construction units have purchased all kinds of earth and stone machinery, especially loaders. Correctly understanding the structural characteristics of the braking system of these equipment and mastering the troubleshooting methods of common faults can ensure the normal use of the equipment

here, take the caliper disc brake system widely used in Wheeled Construction machinery as an example to explain its common faults and troubleshooting methods

(1) the barometer pressure rises slowly. Main reasons: (a) pipeline leakage; (b) The air pump is not working properly; (c) The check valve is rusted and stuck; (d) The oil drain bolt of the oil-water separator is not closed tightly or the pressure regulating valve leaks. Troubleshooting methods; First, eliminate the air leakage of the pipeline, and then check the working state of the air pump. Remove the air outlet pipe of the air pump and press the air outlet with your thumb. If the exhaust pressure is low, the air pump is faulty. If the gas pump is designed for the first time in China and works well, check the oil drain plug or pressure regulating valve of the oil-water separator to avoid bypass and eliminate the fault through inspection. Finally, check the tee again. According to the docld index, it shows that there are too many two check valves in a few wordld connectors on this page. The check valve is stuck, which will cause the air reservoir not to make our contribution to providing the most stable and reliable high-performance optical fiber network. We can intake air or intake air slowly

(2) insufficient braking force and weakness. Main reasons: (a) brake oil leakage; (b) There is air in the brake oil circuit; (c) The oil seal of the wheel hub is damaged, and there is oil stain on the Tong disk; (d) The brake is seriously worn and the friction surface is burned; (e) The air pressure in the air circuit is adjusted too low. The above faults can be eliminated by repairing, adjusting or replacing parts according to their respective causes

(3) deviation after braking. The direct cause of the deviation is the unequal braking torque of the wheels on both sides. Common fault causes: (a) the brake caliper disc is seriously greasy, and the number of friction systems is seriously reduced, resulting in the imbalance of the braking torque. At this time, the greasy dirt on the brake caliper disc should be removed; " Mazhanfeng said (b) the cylinder piston is stuck and cannot work. Step on the brake at a standstill, observe the working condition of the wheel cylinder, and disassemble and inspect as appropriate

(4) braking card. Fault phenomenon: the loader starts and walks hard. After parking, touch the Tong plate with your hand, and the Tong plate heats up. Main reasons: (a) after the friction plate stops, touch the Tong plate with your hand, and the Tong plate is heated. Main reasons: (a) the friction plate is worn and thinned, the dust ring is damaged and water enters, and the piston is rusted and stuck; (b) The return spring in the booster pump is weak or broken, and the high-pressure oil cannot flow

(5) the booster pump sprays brake fluid. Fault phenomenon: when stepping on the brake, oil mist ejects. Causes: (a) the brake light switch is damaged, and high-pressure oil is sprayed from the switch interface. It can be solved by replacing the switch. (b) The length of piston rod of booster pump is too long. This situation may occur when replacing the booster pump assembly. The reason is that the adjustment of the piston rod is too long, which causes the piston stroke to be too large when the booster pump is working, and the brake fluid flows back to the booster pump from the oil drain hole and ejects. During installation, measure the working stroke of the piston to determine the length of the piston rod

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