245 

 

 
 

 

 

246 

 

No. 178 Braking with abnormal sound   

Malfunction  

Causes 

Solution  

Fixed screws for suspension connection of 
brake system loosening or damaged; 

Check fixed screws for suspension connection of brake 
system are loosening or damaged; if so, fasten or replace; 

Fixed bolt of front brake tongs loosening or with 
worn lining;   

Fasten or replace front brake tongs assembly;   

Vacuum booster internally damaged;   

Check vacuum booster is internally damaged; if so, 
replace it;   

Brake disk severely worn;   

Check brake disk is severely worn; if so, replace it;   

Material of brake disk too hard;   

Check material of brake disk is too hard; if so, grind or 
replace it;   

Brake hub or disk severely worn with groove;    Replace brake hub or disk;   

Braking with 
abnormal sound 
while vehicle is 
driving normally 

Rubber cover of front and rear suspensions 
loosening, aging;   

Replace rubber cover of front and rear suspensions;   

 

 
 

 

 

247 

 

Grind or replace 

Replace 

Fasten or replace 

Check fixed screws for suspension connection of brake system are 
loosening or damaged; 

Rubber cover of front and rear 
suspensions loosening, aging 

Vacuum booster internally damaged 

Brake disk severely worn 

Fixed bolt of front brake tongs loosening or with worn 
lining 

Brake hub or disk severely worn with 
groove 

Grind or replace 

Replace 

Braking with 
unusual noise 

Material of brake disk too hard 

Grind or replace 

Replace 

Unusual 

Abnormal 

Abrasion 

Abnormal 

Abnormal 

Abnormal 

Abnormal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

 
 

 

 

248 

 

No. 179 Braking sideslipping, swerving   

Malfunction  

Causes 

Solution  

Tire worn smoothly 

Check tire is worn smoothly; if so, replace it;   

Tire of the same axle not consistent 

Check tire of the same axle is consistent; if not, adjust it;   

Tire pressure too low or too high 

Check tire pressure is too low or too high; if so, adjust to specified 
pressure;  

Brake shoe, brake disk with oil sludge;  Check brake shoe, brake disk are with oil sludge; if so, clean it;   

Air in the pipeline;   

Check air is in the pipeline; if so, empty it;   

Pressure dividing valve incorrectly 
adjusted 

Check pressure dividing valve is incorrectly adjusted; if so, readjust 
it;  

While braking, 
vehicle slips to one 
side or swerves   

Rubber cover of chassis suspension 
loosening  

Check rubber cover of chassis suspension is loosening; if 
necessary, replace rubber cover;