Inspection Of The Crankshaft - Rotax 125 MAX evo Repair Manual

INSPECTION OF THE CRANKSHAFT

General
• Thoroughly clean the crankshaft with a grease-free cleaning agent.
Instructions See
1. Inspect the crankshaft for visible damage and traces of wear:
• Cone/centered thread
• Bearing seats
• Running surface of the bearing
• Contact surface of the shaft seals
• Woodruff key groove
Measuring the
crankshaft
2. Measure values for the two main bearing seats (CS01), the bearing surface of the clutch
(CS02) and of the piston pin (CS03).
3. Determine the axial play of the con rod bearing (CS04) using a feeler gauge.
4. Check the specific dimension (CS07).
5. Determine the radial clearance of the connecting rod bearing (CS05).
6. Check the run out of the crankshaft (CS06).
N N O O T T E E
If one of the wear limits CS01 or CS02 is reached, the complete crankshaft must
be replaced.
N N O O T T E E
If one of the wear limits CS03, CS04 or CS05 is reached, BRP-Rotax recom-
mends use of the applicable repair kit. See also Chapter 5 Figure: Con rod parts.
N N O O T T E E
If the maximum approved stroke (CS06) of the crankshaft is exceeded, the crank-
shaft must be realigned. See also Chapter 5 Figure: Crankshaft measurements.
Effectivity: 125 MAX evo, Junior MAX
evo, Mini MAX evo, Micro MAX evo
Edition - February 01 2018 /Rev. 0
BRP-Rotax
REPAIR MANUAL
Figure: Crankshaft measurements.
Chapter 5
Page 19