The small concrete mixer has a slow reset, which means that the speed of the small concrete mixer can not be increased quickly when it releases the brake pedal after braking and decelerating, and it is even difficult to start. After the small concrete mixer has a brake seizure fault, it can be checked and eliminated according to the following steps:
1. If the free stroke of the pedal is appropriate, there is gas discharged from the exhaust port of the main brake valve, and the vehicle starts in gear. If the vehicle can start, check whether the brake drum heats up after driving for a certain distance. If the brake drum heats up, it is generally caused by the small gap between the brake shoe and the brake drum. The clearance between the brake shoe and the brake drum shall be checked to keep it normal.
2. If it is not possible to start, step on the pedal, place the gear lever in neutral, and then check whether the push rods of each brake chamber can return to their original positions while releasing the brake pedal. If the push rod of a brake chamber fails to return, it is caused by the stuck relay valve, or the brake shoe return spring is too soft and broken, or the front brake shoe pin is rusted.
3. Check the free stroke of the brake pedal, or step down the brake pedal after the air pressure of the air reservoir reaches the specified value, and then check whether there is gas discharge from the exhaust port of the main brake valve when releasing the pedal. If there is no gas discharge, the pedal has no free stroke, which means that the exhaust valve of the main brake valve cannot be opened. Adjust the pull rod of the main brake valve to make sure that there is a normal clearance between the piston rod of the main brake valve and the exhaust valve, Keep the brake pedal at normal free stroke.
This is the reason why the pedal of small concrete mixer is slow to reset after braking. If you want to know anything about this, please come to our website Take a look.