KTM 250 EXC, Owner'S Manual

Page: 118 / 410

5-3E
1
2
3
4
5
6
7
The oil pump housing must not have any score marks or seizing marks.
Blow compressed air through all oil ducts and check them for
unobstructed passage.
Check the 2 dowels
1
for tight fit and, if necessary, adhere them by
means of Loctite 243.
Right casing half
Remove all shaft seal rings and use an oven to heat the casing half to
approx. 150°C.
Cylindrical-roller bearing of crankshaft
2
Use a suitable punch to press the cylindrical-roller bearing from the
outside to the inside. From the inside, press in a new cylindrical-roller
bearing up to the stop.
Grooved ball bearing of main shaft
3
Use a suitable punch to press the grooved ball bearing from the outside
to the inside. From the inside, press in a new grooved ball bearing up to
the stop.
NOTE: The grooved ball bearing on the main shaft
3
is secured with a
screw from the 2003 models. Apply Loctite 243 to the thread of the
screw and tighten to 5 Nm.
Grooved ball bearing of countershaft
4
Use a suitable punch to press the grooved ball bearing from the outside
to the inside. From the inside, press in a new grooved ball bearing up to
the stop.
Shaft seal ring of crankshaft
5
Press in new shaft seal ring to a flush position, its open side facing
inward.
Bearing bolt of the kickstarter idler gear
6
Bearing bolt of the E-starter idler gear
7
By experience, no wear occurs on the bearing bolts. Exchanging of
bearing bolts is possible only to a limited extent because, in most cases,
this will cause damage to the casing.