KTM 300 EXC, Repair Manual

Page: 149 / 289

18 ENGINE
147
303487-10
–
Position special tool
7
on the press.
Pressing device for crankshaft, complete (75029047000) ( p. 276)
Insert for crankshaft pressing tool (54829108000) ( p. 274)
–
Insert the crank web with connecting rod and bearing. Position the second crank
web.
303488-10
–
Position special tool
8
with the heel pointing down.
Insert for crankshaft pressing tool (54829108000) ( p. 274)
–
Press in the upper crank web as far as possible.
Info
The press mandrel must be positioned over the crank pin.
–
Take the crankshaft out of the special tool and check that the connecting rod can
move freely.
303330-10
–
Measure axial play
A
between the connecting rod and the crank webs using the
special tool.
Feeler gauge (59029041100) ( p. 275)
Connecting rod - axial play of lower
conrod bearing 0.60… 0.70 mm (0.0236…
0.0276 in)
» If the specification is not reached:
–
Correct it so the dimension is equal to the specified value.
Finishing work
–
Check the crankshaft run-out at the bearing pin. ( p. 147)
18.4.6 Checking the crankshaft run-out at the bearing pin
303493-10
–
Position the crankshaft on a roller block.
–
Turn the crankshaft slowly.
–
Check the crankshaft run-out on both bearing pins.
Crankshaft - run-out at bearing pin
≤
0.03 mm (
≤
0.0012 in)
» If the crankshaft run-out at the bearing pin is larger than the specification:
–
Align the crankshaft.
18.4.7 Checking/measuring the cylinder
303017-10
–
Check the cylinder bearing surface for damage.
» If the cylinder bearing surface is damaged:
–
Change the cylinder and piston.
–
Measure the cylinder diameter at several locations on the
X
‑
and
Y
‑
axes using a
micrometer to identify oval wear.