Checking The Crankshaft Run-Out At The Bearing Pin; Checking/Measuring The Cylinder - KTM 250 EXC EU Repair Manual

18 ENGINE
18.4.6

Checking the crankshaft run-out at the bearing pin

18.4.7

Checking/measuring the cylinder

–
Position special tool
Pressing device for crankshaft, complete (75029047000) (
Insert for crankshaft pressing tool (54829108000) (
–
Insert the crank web with connecting rod and bearing. Position the second crank
web.
303487-10
–
Position special tool
Insert for crankshaft pressing tool (54829108000) (
–
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.
303488-10
–
Measure axial play
special tool.
Feeler gauge (59029041100) (
Connecting rod - axial play of lower
conrod bearing
» If the specification is not reached:
–
Correct it so the dimension is equal to the specified value.
303330-10
Finishing work
–
Check the crankshaft run-out at the bearing pin. (
–
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
» If the crankshaft run-out at the bearing pin is larger than the specification:
–
Align the crankshaft.
303493-10
–
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
micrometer to identify oval wear.
303017-10
on the press.
7
with the heel pointing down.
8
between the connecting rod and the crank webs using the
A
p. 275)
0.60... 0.70 mm (0.0236...
0.0276 in)
≤ 0.03 mm (≤ 0.0012 in)
p. 276)
p. 274)
p. 274)
p. 147)
‑ and ‑axes using a
X Y
147