Symptom |
Causes |
Measures |
Noise and vibration of braking |
The disc brake and its parts are not fixed on the axle according to the requirement ; |
follow the vehicle operation manual |
There is crack / slot on the disc; |
Replace or repair the disc |
The jumping amount of the disc does not meet the requirement; |
Replace or repair the disc |
The pad retainer is deformed permanently; |
Replace the pad retainer |
The pad can not move freely on the bracket; |
Take off the pad and the pad support, clean the pad, pad support and bracket |
Not adopt the pad designated by Wuhan Youfin ; |
Adopt the pad with Youfin mark; |
Braking deflection |
Either side of the pad is polished |
Replace the pad |
The clearance between the pad and disc is abnormal |
Adjust the initial clearance and do the functional testing. |
The pad can not move freely on the bracket |
Take off the pad and the pad support; clean the pad, pad support and bracket |
The air pressure of the chambers on both side of the axle is not consistent |
Follow the vehicle operation manual |
The air release plug on the brake chamber is not removed |
Remove the air release plug of the braking chamber |
Not adopt the pads designated by Youfin |
Adopt the pad with Youfin mark |
Braking drag or braking can not be released |
There is compressed air in the brake chamber when the braking is released |
Refer the operation manual provided by the vehicle manufacturer |
The spring braking of all braking chambers has not been released when the braking for parking is released |
Release the spring braking |
The clearance between the pad and the disc is abnormal. |
Adjust the initial clearance |
The pad can not move freely on the bracket |
Take off the pad and push plate, clean the pad, push plate and bracket |
The sliding function of the braking clamp is abnormal |
Replace the guide sleeve or lining |
The clearance of the hub bearing is abnormal |
Reference the operation manual provided by the vehicle manufacturer |
The air release plug of the brake chamber has not been removed |
Remove the air release plug of the braking chamber |
Not adopt the pads designated by Youfin |
Adopt the pad with Youfin mark |
No braking or poor braking effect |
The pad is polished |
Replace the pad |
The clearance between pad and disc is too wide |
Adjust clearance |
The disc is not in good condition |
Replace or repair the disc |
The air pressure of the brake chamber is abnormal |
Take remedy measures according to the requirement of the operation manual provided by the vehicle manufacturer |
The air release plug of the brake chamber is not removed |
Remove the air release plug of the braking chamber |
Not adopt the pads designated by Youfin |
Adopt the pad with Youfin mark |
Brake smoking |
The semi-axle oil seal is worn out |
Replace the semi-axle oil seal |
The clearance between the pad and disc is too narrow
The oil in the axle shell is too much |
Adjust the initial clearance
Adjust the oil level in the axle shell |
Not adopt the pads designated by Youfin |
Adopt the pad with Youfin mark |