ZONGSHEN ZS250GY-3, Service Manual

Page: 31 / 76

EN
G
LIS
H
27
The direction of motorcycle is operated by steering handlebar.The steering handlebar connects with
direction pole.It sees the frame as the center and run the front shock absorber and operate the front wheel
through the rotation of direction pole.
Section 6 Steering System
1 The Structure and Working Principle of Steering System
2 Disassembly and Maintenance of Steering System
[1]Steering handlebar
The right steering handlebar of motorcycle is the throttle control grip,Control oil flow rate.The right
holding lever is the front brake lever.Also,there are left and right controlling switches,rear view mirrior and
choke switch respectively installed on the left and right handlebar.
[2]Direction pole assembly
Direction pole assembly is the important part of steering system.It mainly consists of direction
pole,lower connecting board,bearing and bearing ring.Normally,the direction pole is jointed with lower
board(wholly called direction pole) and installed within the frame pipe.The weight of motorcycle and rider
transfers to front wheel through the direction pole.However,the weight caused by the strike of road for the
front wheel transfers to motorcycle body through the direction pole. Therefore,direction pole not only must
bear the big loads strike,but also ensure the flexible turning during running.
In order to make motorcycle keep a good operation,you should maintain the steering system termly.For
the first time,disassemble vehicle after 1500km,and then disassemble it every 600km.Check the abrasion
of inner and outer bearing and rolling ball.Replace them if necessary.When replacing rolling ball,you must
replace it completely.Don
’
t mix the new parts with the old ones.
The maintenance of direction pole should stress on bearing.If the bearing is always lack of lubrication
and adjusting nut is loose,the clearance of bearing will be
too big,so that the steering handlebar will shake during
running,which influences the stability and safety of
motorcycle.On the other hand,if the bearing is damaged or
adjusting nut is too tight,the turning resistance of steering
handlebar will be too big,so that the steering handlebar
will be locked,which is hard to be operated or cannot be
operated.Therefore it influences riding safety.
Support motorcycle with main stand and make front
wheel off the ground.Rotate the front fork and front shock
absorber and check whether the bearing is loose.Turn
the steering handlebar and check whether the bearing
is flexible.Adjust it if the bearing is too loose or tight.
First,unscrew the locknut of direction pole,rotate adjusting
nut and check the tightness of bearing.Re-tighten the
locknut until the bearing is normal.
Table 4-6
Component
Description
Cause
Trouble description
of component
Trouble description of
motorcycle
Repair method
bearing ring
Adjusting nut is
too tight.
The match
clearance of
bearing and
bearing ring is too
small.
Turning handlebar is
not flexible.
Adjust nut with lock wrench
until the handlebar is flexible
and there is no bearing
rolling between direction pole
and frame pipe.
Bearing ring
is too worn or
damaged and
has pit,press
mark and spit.
Turning handlebar is
not flexible and shakes
during running.
Wholly replace bearing ring.
bearing
B e a r i n g i s
worn,distorted or
damaged.
Turning handlebar is
not flexible and shakes
during running.
Wholly replaceball bearing
direction pole Direction pole is
distorted.
Direction pole is
distorted.
Turning handlebar is
not flexible.
Correct or replace direction
pole.
The cause,trouble description and repair method of direction pole
Maintenance of direction pole