Yingang YG48Q-5A, Maintenance Manual

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YG48Q-5A Maintenance ManualRear wheel and rear suspension device
123
For the damage form, fault symptom and repair method of rear wheels
Component
description Damage form Trouble symptom
ofcomponent Trouble symptom of
motorcycle Repair method
Rear wheel
Rear rim is twisted
anddeformed
．
Rear rim is twisted and
deformed
．
Off racking in
running
．
rearwheelwobbles
in running
Replace rear rim
The hub bearing hole
is over worn
The bearing block hole
has a loose match with
the bearing.
Off racking in
running
．
rearwheelwobbles
in running
Replace rear rim
The
bearingisoverworn
and
damaged
The axial and radial
gaps of bearing inner
and outer rings are
toobig or is insufficient
rotation.
Off racking in
running
．
rearwheelwobbles
in running
Replace bearing
Rear tire
The inner tire is
pricked orbroken Rear tire has very low
pressure
Inflexible of direction
handle,insufficient engine
output
Repair or replace
inner tire
The tire is over worn
(the tire vein depth is
less than 2mm)
It is possible to slip and has
a poorslipprooffunction
Replace outer tire
Maintenance of Rear Transmission
Component
description Damage form Trouble symptom
ofcomponent Trouble symptom of
motorcycle Repair method
Sprocket
and cam
sprocket
Gear is over wor
Drive chain has abnormal
sound, drive chain is easy
to fall out.
Replace sprocket
and cam sprocket
Drive chain
Too dirty or poor
lubrication Drive chain has abnormal
sound Clean and lubricate
the chain.
Improper chain
tightness.
Chain is over tight
Drive chain has abnormal
sound
Adjust the chain
tightness to
15~25mm
Chain is over loose
Drive chain is easy to fall
out.
Adjust the chain
tightness to
15~25mm
Over worn
Drive chain has abnormal
sound, and is easy to fall.
Replace drive chain
Maintenance of Rear Suspension
Component
description
Damage form Trouble symptom of
component Trouble symptom of
motorcycle Repair method
Rear shock
absorber
assembly
Rear shock
absorber springis
broken or with
insufficient
elastic force
Rear shock absorber
spring isbroken or
with insufficient
elastic force
Rearshockabsorberisover
soft or overhard
Replace rear
shockabsorbersprin
g
Leakage at rear
damper Leakage at rear
damper
Leakage at rear shock
absorber
，
rear
shock absorberisover soft
Replace rear
damper
Piston rod on rear
damper is bent,
deformed or broken Piston rod on rear
damper is bent,
deformed or broken Rearshockabsorberisoverh
ard
Replace rear
damper