Crankshaft - Rotax 125 MAX DD2 Repair Manual

Crankshaft

➩ Thoroughly clean the crankshaft.
➩ Clean the residues of the securing medium from
the conical starter crown wheel.
✔ Inspect the crankshaft for visible damage and
traces of wear:
❇
Conical thread,
❇
Bearing seats,
❇
Running surface of the bearing,
❇
Contact surface of the shaft seals,
❇
Woodruff key groove.
✔ Measure values for the two main bearing seats
(M02), the bearing surface of the clutch (M03) and
of the piston pin (M04).
✔ Determine the axial play of the connecting rod
bearing (M05) using a feeler gauge.
✔ Determine the radial clearance of the connecting
rod bearing (M06).
✔ Determine the radial run out of the crankshaft (M07).
❇
M02 = 29.96 mm;
❇
M03 = 14.95 mm;
❇
M04 = 18.97 mm;
❇
M05 = 1.0 mm;
❇
M06 = 0.05 mm;
❇
M07 = 0.03 mm;
◆ Note:
If one of the named limit values M02
or M03 is reached, the crankshaft,
complete, must be replaced. If a limit
value M04 to M07 is reached,BRP-
ROTAX recommends the use of the
appropriate repair set.
◆ Note:
If the limit value M07 is reached, in
addition the crankshaft must be
realigned.
Page 31
Repair Manual 125 MAX DD2
M02
M04
M02
M05
M06
M07
M03
Fig. 45
Fig. 46
Issue 01/2006