KEEWAY FACT 50 4T Maintenance Manual page 27

Diagnosis on transmission gear skip shift
Check whether the engaging end of the cam claw on the engaged gear
face is abraded to be conical or largely circular, and whether the groove
on the corresponding gear face is abraded to be trumpet-shaped.
Y
Replace gear
Diagnosis on clutch slipping
Check whether the shoe-
type friction
excessively abraded.
N
Check whether the contact
surface area between shoe-
type friction plate
friction disc is beyond 70%.
Transmission gear
Check whether the positioning wheel spring
is ruptured or lacks elasticity.
Y
Replacement
Proper depth in
engaging
N
Check whether the spline teeth of
main shaft/countershaft and the
spline groove in the clash gear are
excessively abraded.
Automatic shoe-type centrifugal & dry
clutch is slipping.
Check whether the shoe-type friction plate
is spotted with oil stain.
N
plate is
Replace the whole set of
clutch shoes
and
N
Check whether the contact surface between shoe-
type friction plate and friction disc is excessively
abraded.
skip shift
N
Disassemble crankcase and check whether the engagement
depth for each gear is in accordance with requirements.
Check whether shift fork hole and shift shaft
are abraded.
Check whether the gap between shift fork
pin/gearshift shaft and cam groove is too big.
Check whether the installation of transmission
is correct.
Clutch slipping
Y
27
Insufficient depth in
engaging
Check whether the shift fork is
excessively abraded or deformed.
N
修理或更换
离合器蹄块
Y
Clean and
remove oil stain
Y
Repair or replace clutch shoes
Y
Replace shift
fork