Piston Pin - Inspection; Cylinder - Inspection - Rotax 915 i A series Maintenance Manual

PISTON PIN — INSPECTION
ATTENTION
The mono hook circlips for the axial piston pin
must only be used once and must therefore be
replaced.
Step Procedure
1 Check the piston pin for traces of wear in
the region of the conrod bearing and in
the region of the piston bearing and
measure it.
NOTE
If perceptible traces of wear are found, even if
the pistons are within tolerable dimensions, the
piston pin must be replaced.
Step Procedure
2 Measure dimension PI03. See
72-30-10 section Wear
Figure 9.11
CYLINDER — INSPECTION
ATTENTION
If the engine has been overheated, a hardness
test of the cylinder is necessary.
See Chapter 72-30-00 section Harness test
72–30–10
Page 10
August 01 2018
BRP-Rotax
MAINTENANCE MANUAL HEAVY
Chapter
limits.
method.
NOTE
If the sealing surface of the cylinder has slight
carbon residues, this is a sign of leaking. The
cylinder must be touched up with the cylinder
head until uniform contact is achieved.
Step Procedure
1 Clean the cooling fins of the cylinder and
remove carbon residues in the upper re-
gion of the cylinder bore.
2 Clean and check the sealing surfaces on
the upper side and rear side.
Figure 9.12
Cooling fins
1
Sealing surface
3
Step Procedure
3 Measure the cylinder and enter the meas-
urement data (CY01/CY02/CY03). See
Chapter 72-30-10 section Wear
4 Determine the installation clearance. See
Chapter 72-30-10 section Piston
inspection.
NOTE
As long as the min. clearance is achieved, Cylin-
der B with red piston and/or Cylinder A with
green piston can be paired.
2 Cylinder bore
limits.
Effectivity: 915 i A Series
Edition 0/Rev. 0