Beta Motorcycles X Trainer 300 2T 2015, Руководство по ремонту, Страница: 53 / 117

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3.4 GEARBOx UNIT: CONTROLS
ANd REASSEMBLY
The gearbox unit is made up of the gearshift and
of the gearbox itself. The gearshift is then divided
into external and internal gearshift.
The following are the verifications and procedures
for checking and reassembling these units to the
engine.
3.4.1 Gearbox unit check
Use protective jaws to clamp the primary and
secondary shaft.
Use a thickness gauge to check the axial play
between the gearshift forks and the gearwheels.
The play detected must not exceed the service
limit indicated below:
service limit: 0,5mm
If the detected axial play is greater, before re-
placing either the gearwheels or the forks, check
their state of wear (par. 3.4.4).
Remove the various elements and check that:
• the support surfaces of the primary and sec-
ondary shafts are free of abnormal wear or
signs of seizure;
• the sides of the teeth are free from chipping or
abnormal wear;
• the sliding areas of the gearwheels are free
from abnormal wear or traces of seizure;
• the front claw clutches of the gearwheels are
not chipped or rounded;
• the roller bearings are intact and efficient;
• none of the thrust washers show traces of ab-
normal wear or meshing;
Should any of these defects present them-
selves, replace the concerned parts.
check of wear of forks and gearwheels.