King Long XMQ6900 Series, Operating Manual

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Common trouble and elimination
6-4
Transmission
Fault
symptom
Possible cause Eliminating method
Difficult
gear shift
(Difficult
gear
engagement)
1. Control mechanism
1) Improper height of the control hinge
2) There has clearance between the
control hinge connection
3) The control hinge bend
2. Transmission
1) Abrasion or damage of the bearing
2) Synchronizer operates abnormally
3) The shaft or the gear is wore or
damaged
4) Abnormal slip of the gear shifter
shaft
3. Others
1) Clutch can not disengage normally
2)
The lubrication viscosity is too high
1
）
Adjust the control hinge
2
）
Correct or replace the parts
3
）
Correct or replace the control hinge
1
）
Replace the bearing
2
）
Correct or replace the parts
3
）
Correct or replace the parts
4
）
Correct
1
）
See "Clutch does not disengage smoothly
or can not disengage "
2
）
Use the lubrication of given grade
The
transmission
gear is off
the engaging
position
Transmission
1)
Shift fork distorted or worn
2) Abrasion of the lockup ball or the
ball on the gear shifter shaft
3)
Breakdown or fatigue of the lock
spring
4) Excessive clearance of the gear
engagement
5) Excessive clearance along the
gearing axial direction
6) Abrasion of the sliding bearing
slipper or its end surface
7) Abrasion of the main bearing
Control mechanism
1) The control mechanism is out of
work
2) Movement of the shifter lever causes
vibration of the vehicle
1
） Check the gear-shifter fork and make
adjustment or replacement in case of
bending
2
）
Disassemble and replace the worn-out
parts
3
）
Replace the spring
4
）
Adjust the gear clearance or replace the
gear
5
）
Measure the axial clearance and replace
the thrust washer if necessary
6
）
Replace the bushing
7
）
Replace the main bearing
1) Check and correct the control hinge
2)
Check damage of the engine rubber
suspension and replace the faulted
parts