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Check whether the positioning spring
breaks off or its elasticity is insufficient.
Replace it.
Check whether convex pawls of mesh
g e a r a r e w o r n t o c o n e-s h a p e d a n d
whether opposite groove of gear end is
worn to be bell-mouthed.
Yes
R e p l a c e
C h e c k w h e t h e r t h e
gear.
s p l i n e o f m a i n a n d
secondary axle and the
spline trough of slip
gear are worn.
1.9 Analysis of slide and uncomplete disengagement of clutch
Clutch slides and disengages
uncompletely.
Check whether the clutch adjuster is
adjusted to the best state.
No
Readjust it.
No
Clean,lubricate or
replace it.
1.8 Analysis of derailleur gearshift
d e r a i l l e u r
gear shift
Yes
Disassemble crankcase and check
whether its mesh of gear is correct
according to the standard.
Yes
T h e d e p t h o f g e a r
mesh is enough.
Check whether the fork is
worn or distorted.
Yes
Rep lace
fork.
No
Clutch slides and disengages
uncompletely.
Check whether the elasticity of cluth
spring is well-proportioned.
Yes
Check whether drive and
d r i v e n h u b t r o u g h a r e
worn to be zigzag.
Yes
[1]Check whether the pressing bolt of clutch
Repair or replace
spring is loose.
them.
[2]Check whether the friction pieces of clutch are
worn or ablate.
[3]Check whether the elasticity of clutch spring is
poor.
[4]Check whether drive hub of clutch and the
connecting surface of pressing plate and friction
pieces are worn.
[5]Check whether the driven pieces of clutch are
distorted.
[6]Check whether the operation components of
clutch(separatory cam,separatory handspike and so on)
are worn.
No
No
The depth of gear
mesh is not enough.
No
[1]Check whether fork hole and
fork axle are worn.
[2]Check whether the installation
of derailleur is correct.
Yes
No
W h o l l y r e p l a c e
cluth spring.
No
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