Work On Individual Parts; Work On The Right Section Of The Engine Case - KTM 250 EXC EU Repair Manual

18 ENGINE
18.4

Work on individual parts

18.4.1

Work on the right section of the engine case

–
Remove all dowels.
–
Remove shaft seal ring
–
Remove screws
–
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.
308182-10
–
Blow out lubrication bore
–
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.
Only press the bearings in via the outer ring; otherwise, the bearings will be
damaged when they are pressed in.
303028-10
–
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.
–
Mount and tighten screws
Guideline
Screw, bearing retainer
–
Mount the dowels.
of the crankshaft.
1
. Remove the bearing retainers.
2
with compressed air and check that it is clear.
3
of the crankshaft so it is flush with the open side facing
1
with the bearing retainers.
2
M6 10 Nm Loctite ® 243™
(7.4 lbf ft)
144