Work On The Left Section Of The Engine Case; Removing The Crankshaft Bearing Inner Race - KTM 250 EXC EU Repair Manual

18 ENGINE
18.4.2

Work on the left section of the engine case

18.4.3

Removing the crankshaft bearing inner race

–
Remove all dowels.
–
Remove shaft seal ring
–
Clean the engine case section thoroughly.
–
Warm the engine case section in an oven.
Guideline
150 °C (302 °F)
–
Knock the engine case section against a level wooden plate. This will cause the
bearings to drop out of the bearing seats.
Info
Any bearings that remain in the engine case section must be removed using
a suitable tool.
–
Insert the new cold bearings in the bearing seats of the heated section of the
engine case; if necessary, use a suitable press drift to push them all the way in and
make them flush.
Info
When pressing the bearing in, ensure that the engine case section is level to
prevent damage.
308183-10
Only press the bearings in via the outer ring; otherwise, the bearings will be
damaged when they are pressed in.
–
After the engine case section has cooled, check that the bearings are firmly seated.
Info
If the bearings are not firmly seated after cooling, it is likely that they will
rotate in the engine case when warm. In this case, the engine case must be
renewed.
–
Press in shaft seal ring
in.
–
Press in shaft seal ring
in.
–
Press in shaft seal ring
ing in.
–
Blow out lubrication bore
–
Mount the dowels.
303029-10
–
Fixate the crankshaft in the vice with special tool
Separator plate (54829009000) (
Info
Use soft jaws.
–
Warm up special tool
Guideline
150 °C (302 °F)
303480-10
Tool for inner bearing race (58429037040) (
of the crankshaft, shift shaft and
1 2
of the crankshaft so it is flush with the open side facing
1
of the shift shaft so it is flush with the open side facing
2
of the countershaft so it is flush with the open side fac-
3
with compressed air and check that it is clear.
4
p. 273)
.
2
countershaft.
3
.
1
p. 275)
145