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Checking wear of forks and gearwheels.
GEARBOX UNIT: CONTROLS AND
REASSEMBLY
The gearbox unit is made up of the gear-
shift and of the gearbox itself. The gearshift
is then divided into external and internal
gearshift.
The following are the verifications and pro-
cedures for checking and reassembling the-
se units to the engine.
CHECKING GEARBOX UNIT
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 ge-
arwheels. The play detected must not exce-
ed the service limit indicated below:
service limit: 0,5mm
If the detected axial play is greater, before
replacing either the gearwheels or the forks,
check their state of wear (par. 2.4.4).
Remove the various elements and check
that:
∙ The support surfaces of the primary and
secondary shafts are free of abnormal wear
or signs of seizure.
∙ the sides of the teeth are free from chip-
ping or abnormal wear;
∙ the sliding areas of the gearwheels are
free from abnormal wear or traces of sei-
zure
∙ 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
abnormal wear or meshing.
Should any of these defects present them-
selves, replaced the concerned parts.
2
.4
2
.4
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