Cheyou Q: What does the car show when the brake shoe wears? Automotive equipment network reply: 1 - - brake pads worn to the alarm position [above the brake pads are equipped with metal sheets for alarm, after the brake pads are thinned, the metal sheet produces abnormal noise, suggesting that replacement is required]. 2 -- An alarm circuit is set between the friction material of the brake pad and the metal lining iron. When the brake pad wears to a certain thickness, the alarm line will be worn out, the alarm line will be broken, and the brake pad will be lighted. Alarm lights. Or this alarm line has caused an open circuit fault due to abnormal damage, which has caused an alarm and is not really the brake pad wear limit. Check the actual thickness of the brake pad and handle it as appropriate. What is the brake shoe? Brake shoes are commonly referred to as brake linings. Brake linings are accessories that are pushed by the amount of action of a brake cam or push rod to push out the brake. 1. Check the brake shoe for every 5,000 kilometers under normal driving conditions. Not only check the remaining thickness, but also check the condition of the wear of the shoe. Whether the two sides are the same degree of wear and whether the return is comfortable, etc. The situation must be dealt with immediately. 2. The brake shoe is generally composed of two parts: iron lining plate and friction material. Do not replace the shoe with friction material. For example, for the front brake shoe of the Jetta, the new sheet has a thickness of 14 mm, and the limit thickness of the replacement is 7 mm, which includes more than 3 mm of iron plate thickness and nearly 4 mm of friction material thickness. Some vehicles have brake shoe alarms. Once the wear limit is reached, the instrument will alarm to replace the shoe. The shoe that has reached the limit of use must be replaced. Even if it can be used for a period of time, it will reduce the effect of braking and affect the safety of driving. 3. To replace the brake pads provided by the original spare parts, the only way to make the braking effect between the brake pad and the brake disc is the best, the minimum wear. 4. When replacing the shoe, special tools must be used to push the brake cylinder back. Can not use other crowbar hard pressure back, it is easy to cause brake caliper guide screws to bend, so that brake pads stuck. 5. After the replacement is completed, be sure to step on the brakes a few feet to eliminate the gap between the shoe and the brake disc, resulting in no brake on the first leg and prone to accidents. 6. After the brake shoe is replaced, it needs to run 200 km to achieve the best braking effect. The newly-changed shoe must be moved carefully. Brake shoe clearance adjustment There must be a certain gap between the brake shoe and the brake drum. Brake shoes gap does not meet the requirements, will directly affect the car's braking performance. If the clearance is too large, the braking delay time will increase, the braking distance will increase, and the safety of the vehicle will decrease. If the clearance is too small, the brake will not be fully relieved and the running resistance will increase, which will accelerate the wear of the brake drum and the shoe. The adjustment method is as follows: Push up the wheel and make sure that the hub is not shaken. Remove the dust plug from the adjusting hole and check the quality of the shoe. If it wears to the step where the limit mark is used, replace the shoe. When checking the gap between the wheel brake shoe and the brake drum, the brake pedal should be stepped to the end. The distance between the outer edge of the brake pedal and the front fender of the cab should be not less than the specified value. If it is less than the specified value, the brake linings wear out. As the gap increases, adjustments should be made. When adjusting, insert a screwdriver through the adjustment hole and move the adjustment gear in the direction of the arrow until the wheel cannot rotate. Depress the brake pedal several times to reconfirm that the wheel cannot be turned, and reverse the 4 to 5 teeth (if the wheel can still move). At this time, insert a plug gauge with an appropriate thickness into the brake drum. When pulling out the plug gauge, feel that there is a certain resistance. If it is not required, adjust gears by adjusting the gears. Use the same method to adjust the gap of the other side shoe. Turn the wheel by hand. The wheel should be capable of smooth rotation without any stagnation. If you feel that there is a phenomenon of stagnation, you can loosen the adjustment gear back to 1 to 2 teeth. Put on the dust plug of the adjustment hole, then start the car, test the braking effect of the brake at a speed of 30 km/h, and check whether there is a brake or other abnormal phenomenon. If there is a brake or other abnormal phenomenon, the brake should be readjusted. Some new car drum brakes are equipped with self-adjusting device. Since the self-regulating device functions when reversing, it is necessary to depress the brake pedal while slowly reversing. Some car self-adjusting devices are operated by hand brakes. In this case, to pull up the hand brake lever, it is possible to achieve the purpose of adjusting the clearance between the wheel and shoe. Motor Grader Motor Grader,Small Motor Grader,Road Grader,Grader Machine SINO HEAVY MACHINERY CO., LTD. , https://www.sinoauto-machinery.com
â— It adopts an articulated frame and cooperates with the steering of the front wheels. It has a small turning radius and is flexible.
â— Electro-hydraulic power transmission control gearbox, forward six gears, back three gears.
â— The use of international supporting hydraulic parts, reliable work.
â— Blade action is full hydraulic control.
â— The rear axle is a drive axle with a self-locking differential.
â— Adjustable console, seat, joystick and instrument layout are reasonable, easy to use, improved driving comfort.