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Check whether convex pawls of mesh gear are worn to
cone-shaped and whether opposite groove of gear end
is worn to be bell-mouthed.
Yes
Rep lace gear.
1.9
Clean,lubricate or re-
place it.
62
1.8 Analysis of derailleur gearshift
derailleur gearshift
Check whether the positioning spring breaks off
or its elasticity is insufficient.
Yes
Replace it.
Yes
The depth of gear mesh
is enough.
No
Check whether the spline of
main and secondary axle and
the spline trough of slip gear
are worn.
Analysis of slide and uncomplete disengagement of clutch
Clutch slides and disengages uncompletely.
Automatic,wet and multiple clutch slides.
Check whether the clutch adjuster is adjusted to the
best state.
No
Readjust it.
Check whether the elasticity of cluth spring
is well-proportioned.
No
Yes
Check whether drive and driven
hub trough are worn to be zigzag.
Yes
Repair or replace
them.
No
Disassemble crankcase and check
whether its mesh of gear is correct
according to the standard.
No
Th e d e p th o f ge a r
mesh is not enough.
Check whether the fork is worn or distorted.
Yes
Replace fork.
[1]Check whether fork hole and fork axle
are worn.
[2]Check whether the installation of de-
railleur is correct.
Yes
No
Wholly replace cluth spring.
No
[1]Check whether the pressing bolt of clutch spring is
loose.
[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
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