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Symptom: Difficult gearshift on transmission
Check if gearshift box is distorted and shift lever is deformed or over worn.
Replace
Symptom: Drum-type brake fails
Brake rocker arm
rotates
freely but there is resistance
feeling from brake handle.
Brake
control
cable
does not pull flexibly in
the jacket.
Difficult gearshift on transmission
Start engine and check if idle is too high.
Yes
Re-adjust
Check if clutch is completely separated.
No
No
Yes
1. Check if groove of gearshift camshaft is
over worn or injured; 2. Check if shift fork
hole is excessively worn; 3. Check if shift
fork is deformed; 4. Check if fork shaft is
distorted or over worn.
Diagnosis procedures
Check if clearance of brake handle bar is within 10mm~20mm
or clearance of brake pedal within 20mm ~ 30mm range.
No
Re-adjust
Separate cable of brake rocker arm from brake control cable. Move rocker arm by hands.
Rocker
arm turns
inflexibly
.
Movable parts of
brake cam rusts or
is stuck by foreign
substances.
Diagnosis procedures
Check if the operation is harmonious at gearshift.
Yes
Yes
1. Check if clearance of clutch handle bar is
within 10mm~20mm; 2. Check if elasticity of
clutch spring is even; 3. Check if splines on
clutch active and drive hubs are worn into
zigzag form; 4. Check if clutch driven plate is
warping
components of clutch control mechanism are
excessively worn.
Drum-type brake fails.
Yes
Arrow on the indicating board
of cam aims at or exceeds"▽"
mark on hub cap.
1. Check if crown face of brake cam
is over worn; 2. Check if brake shoe
friction disc is over worn; 3. Check if
bore of brake hub is excessively
worn.
No
No
Improve operation method.
and
distorted;
5.
Arrow on the indicating board of cam
does not align to the"▽" mark on
hub cap.
制动凸轮上指示牌上的箭头未对准制
动毂盖上的"▽"标记
1.Check if there is oil adhered to
the surface of brake shoe
friction disc; 2.Check if contact
area between braking shoe and
friction disc is less than
Check
if
70％
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