Slight Pitting - Rotax 915 i A Series Maintenance Manual

SLIGHT PITTING

Features:
Individual small pits (up to approx. 0.5% of the flank
area) or pore-like areas of pitting, generally only
present in the dedendum area of the flank. This pit
formation can cease during the operating phase of
the gearbox.
Causes:
Locally high stresses in gears which have not yet run
in can result in isolated pits. The adjustable running-
in wear which results in these areas being relieved of
stress, as a result of which the formation of pits can
cease. Similarly, changed operating conditions can
prevent pits which have already formed from
developing.
Conclusion:
These pits are not important for safe operation. The
gear set can still be used.
NOTE
The illustrations are sometimes not very infor-
mative due to fine pitting or the printing process.
If in doubt, consult technical literature or contact
the ROTAX® Authorized Distributor or their in-
dependent Service Centers.
72–10–00
Page 28
June 01 2019
BRP-Rotax
MAINTENANCE MANUAL HEAVY
Figure 6.45: Magnification: approx. 2x
Figure 6.46: Magnification: approx. 1.5x
Figure 6.47: Magnification: approx. 1.5x
Effectivity: 915 i A Series
Edition 0/Rev. 1