2) Venting Of The Lubrication System - Rotax 912 Series Maintenance Manual

5.2.2)
Effectivity: 912 Series
MAINTENANCE MANUAL
Venting of the lubrication system
See fig. 16/1.
CAUTION: Purging of the lubrication system is extremely impor-
tant for operation and life of the engine and therefore it
has to be followed meticulously.
Fill oil tank with motor oil.
WARNING: Ignition „OFF" and system grounded. Disconnect nega-
tive terminal of aircraft battery.
Disconnect suction hose (1) from oil tank and fill the oil hose with oil
utilizing a suitable funnel. By cranking the engine with a few turns of the
propeller oil will be sucked in by the oil pump.
NOTE: As in the suction line of the oil pump an oil cooler is
installed, this procedure will take a bit longer as the
cooler has to be filled with oil first.
Reconnect oil suction line on tank and crank engine with starter but with
ignition 'OFF' until steady min. oil pressure is indicated on oil pressure
gauge.
Switch on ignition and start engine and observe oil pressure.
CAUTION: The oil pressure must rise within 10 seconds to at least
2 bar (30 psi). If not stop the engine instantly and purge
the suction line between the oil tank and oil pump again
as stated above.
After short idling, stop engine and replenish oil to max. mark on dip stick.
Never overfill, otherwise oil would escape through the vent tube during
operation. At oil level inspect, do not exceed the max. mark.
NOTE: For further helpful information refer to SI-04-1997,
Venting of the lubrication system, current issue.
AIRCRAFT ENGINES
12-00-00
page 28
Rev. 1, Jan. 01/2002