Inspection Of The Oil Filter Insert - Rotax 912 Series Maintenance Manual

11.4) Inspection of the filter insert
General note
This inspection is important as it allows conclusions to be drawn regarding
the internal condition of the engine and provides information about the
possible cause of any damage.
Procedure To carry out the procedure the following steps are necessary:
Step
1
2
3
4
5
6
Possible for-
eign matter
Steel chips
Aluminium chips
Remains of sealing compound
Carbon fiber
Increased for-
If an increased amount of metal particles is found, such as brass- or
eign matter
bronze chips or sliver from bearing abrasion, repair or overhaul the engine
in accordance with the BRP-Powertrain instructions for continued airwor-
thiness. If the filter mat is clogged by foreign matter, the lube oil reaches
the bearing points unfiltered via the by-pass valve in the oil filter.
Unclear findings
In the case of unclear findings:
Step
1
2
3
4
Effectivity: 912 Series
Edition 3 / Rev. 1
BRP-Powertrain
MAINTENANCE MANUAL
The filter insert must be inspected carefully for metal
NOTICE WARNUNG
chips.
Oil filter cut open using special tool taking care not to produce chips.
Remove filter insert.
Cut top and bottom edges off the mat with a knife.
Remove filter mat, fold up and press remaining oil out.
Unroll and inspect it for metal chips, foreign matter, contamination and abra-
sion.
Pass over matt with a clean magnet and inspect for metal.
Flush the oil circuit.
Fit a new oil filter.
Engine test run. See chap. 12-20-00 section: 8).
Inspect the oil filter once more.
Procedure
Bronze chips
Sliver of bearing material
Plastic (thrust washer)
Sliver of copper
Procedure
12-20-00
page 52
January 01/2013