Purging The Oil System; Flushing The Oil Circuit - Rotax 912 Series Maintenance Manual

11.6) Purging the oil system

General note
Procedure
Purging the oil system is necessary:
- before each first start up (e.g. after overhaul)
- after maintenance work during which the lubrication system was
opened and voided.
- when engine was cranked with open oil lines (e.g. during oil change).
- when oil system or oil lines were blown through with compressed air.
11.7)

Flushing the oil circuit

General note
Oil lines
Dismantle and flush oil lines as per instructions of the aircraft manufac-
turer.
Oil tank Clean the oil tank.
Temporary oil Temporary oil lines (only for flushing) must be fitted so that the oil cooler is
lines
not connected. The return line is routed into a separate, clean receptacle
and not back to the oil tank.
NOTES:
Filling
Fill the oil tank with approx. 3 l (0.8 gal (US)) of engine oil.
Procedure
The following steps have to be carried out after refilling:
Effectivity: 912 Series
Edition 3 / Rev. 1
BRP-Powertrain
MAINTENANCE MANUAL
Purging of the oil system is extremely important for op-
NOTICE WARNUNG
eration and service life of the engine and therefore the
procedure must be followed meticulously. It must be
carried out in accordance with SI-912-018,"Purging
the lubrication system", latest issue.
Risk of electric shock!
WARNUNG WARNING
Switch off ignition and remove key! Disconnect nega-
tive terminal of aircraft battery.
Otherwise, metal chips could penetrate the radiator or oil
tank during flushing.
The oil level in the tank must not drop below the end of
WARNUNG
NOTICE
suction pipe, otherwise air will be sucked in again.
12-20-00
page 56
January 01/2013