Rotax 914 F Maintenance Manual page 98

magnification: approx.
Page Date
98 1997 02 01
Tiny pitting: See Pic. 42, 43 and 44.
Features:
Isolated tiny pitting (up to approx. 0,5 % of flank surface) or pore like zones of
pitting, normally only at root range of the flank. This process of pitting
formation may stop with gear box operation.
Causes:
High local pressure on not yet run-in gears could lead to isolated pitting. The
seasoning wear leads to stress relieve, resulting in possible stop of pitting
formation. Changed conditions of operation may stop progress of pitting
formation too.
Conclusion
These pitting are of no hindrance for the safe operation. The gear set can be
used further on.
NOTE: Pic. 42 to 44 show tooth flanks with tiny pitting.
Pic. 43
1,5 times
NOTE: Because of the tiny pitting depicted and the copying process
these iIlustrations might not proof very revealing. In case of
doubt seek assistance by studying technical publications.
Main
914 F
00149
Reference
Pic. 42
magnification: approx. 2
times
00148
00150
Pic. 44
magnification: approx.
1,5 times
Modification no.
- 0 -