213 

 

No. 158 Shaking startup   

Malfunction Causes 

Solution 

 

Inner end of releasing lever not within the 

same plane 

1. Get off the vehicle and check flywheel, 
flywheel casing, transmission connection is 
loosening, engine support is fixed, bolt is 
loosening? If loosening, fasten it; 2. check 
pressing spring or circlip of release bearing is 
broken; replace it;   

Driven disk or clutch plate deformed or 
warped; end face of flywheel severely 
jumps  

1. Check if any large abrasion sound is heard 
during rotation, even rotating resistance is 
larger?  
2. A. Check cushion sheet on clutch plate is 
broken, damping spring is fatigue or broken; B. 
friction rivet on clutch plate is loosening;   
Repair or replace it if malfunctions exist.   

When the vehicle starts at low 
speed, release clutch gradually 
according to operation rules, and 
slowly step down accelerator 
pedal. Clutch could not jointed 
stably and cause shaking, even 
buffeting to whole vehicle. 

Friction disk of driven disk with uneven 
depth, oil sludge, scorching, uneven 
surface, hardened surface, exposed rivet 
head, loosening or broken rivet   

Check driven disk is with uneven depth, oil 
sludge, scorching, uneven surface, hardened 
surface, exposed rivet head, loosening or 
broken rivet 
Replace it if exist.   

 

 
 

 

 

214 

 

 
 

 

 

215 

Chassis 

No.159 Shaking startup   

Malfunction Causes 

Solution 

(1) Clutch pedal has too large free stroke, diaphragm spring 
force fully or partially acting on operation mechanism, making 
driven disk unable to well separated with flywheel and clutch 
plate; 

Adjust free stroke of clutch;   

(2) Clutch housing or transmission housing loosening   

Fasten loosening parts; 

(3) Rivet on driven disk loosening or driven disk too thick;   

Clinch or replace driven disk;   

(4) Driven friction disk, clutch plate and flywheel’s working face 
warped, deformed; 

Replace warped driven disk, clutch plate 
or flywheel;   

(5) Spring annealing, diaphragm spring fatigue, with uneven 
and insufficient elastica, or broken;   

Replace clutch plate assembly; 

(6) Fixed screws for clutch plate and flywheel loosening;   

Fasten bolt;   

Malfunction: while 
startup, clutch 
could not be 
jointed stably, 
causing shaking.   

(7) Space between release bearing sleeve and its guide pipe 
with oil sludge, dust or blocked, unable to return; 

Clean guide pipe; 

 

 
 

 

 

216 

 

Diagnosis flowchart of shaking startup