When do the brake drums need to be replaced?

The method to determine the replacement of the brake drum is:
1. Observe that the thickness of the brake drum is only one third of the original;
2, light brake at the same time accompanied by abnormal sound;
3, the brake response is slow, and the brake bremsstrahlung becomes weak.
The brake drum is composed of a rotating part, a fixed part, an actuating part and a positioning and adjusting device.

The method of replacing the brake drum is:
1. Lift up the car and remove the tires;
2. Unscrew the fixing screw on the brake sub pump and remove the brake sub pump;
3. Remove the old brake drum and push back the piston of the brake sub pump;
4. Clean the mounting bracket of the brake disc and install the new brake drum.