KEEWAY RKV125 Instruction And Maintenance Manual page 29

Symptom: Transmission jumps of gear
Check if meshing end of cam pawl on end face of meshing gear is worn or
forms great roundness; and if corresponding gear end groove is worn or like a
horn mouth.
Yes
Replace
gear
Symptom: Hydraulic disc brake fails
Brake liquid level is lower than lower limit line of tank.
Refill brake liquid to
the upper limit line of
tank, meantime,
check if oil leaks at
brake caliper, brake
hose and hose
connector.
Replace brake shoe
and brake disc.
Diagnosis procedures
Transmission jumps of gear
Check if spring of position wheel is broken or of insufficient elasticity.
Yes
Replace
Disassemble crankcase and check if meshing depth of each gear meets requirement.
Enough meshing depth
No
Check if spline gear of main shaft
and counter shaft, or spline
groove of sliding gear is over
worn.
Diagnosis procedures
Hydraulic disc brake fails
Check brake liquid level in the liquid tank of main brake pump
If there is sponge-like feeling while operating brake handle.
No
Check if brake shoe has been worn to the limit mark and brake disc is over worn.
Yes
1. Check if piston surface of main brake pump and cylinder wall surface are
over worn or injured; 2.Check if piston cup of main brake pump is damaged,
cracked or aged; 3. Check if sealing ring of brake caliper is damaged,
cracked or aged; 4.Check if piston surface of brake caliper and cylinder wall
surface are over worn or injured.
No
Insufficient meshing depth
Check if shift fork is over distorted.
No
1. Check if fork hole and fork shaft are over
worn; 2. Check if matching clearance
between fork pin and cam groove of shift
gear shaft is big. 3. Check if transmission is
correctly installed.
Brake liquid level is higher than lower limit line of tank.
No
Yes
Replace fork.
Yes
Air contained in
hydraulic brake system.
the