Purging Of Lubrication System - Rotax 912 ULS 3 Installation Manual

13.10) Purging of lubrication system

See Fig. 51.
- Verify that oil tank connections are connected correctly and secured, and that
the oil cooler (if fitted) is in the suction line (1) between the oil tank and the oil
pump inlet. Verify that the oil tank is filled up to the maximum level (to the top
of the flat portion of the dipstick). Additional oil (up to 0.5 litre) may be added
to the tank for the purpose of this procedure.
■ CAUTION:
- Disconnect oil line (2) at the oil tank connection.
- Place the free end (3) of the return oil line into a suitable container (4) below
the engine.
- Plug open connection (5) at the oil tank with suitable air tight cap. See Fig.
51.
- Remove the spark plug connectors.
- For easier rotation of engine remove one spark plug from each cylinder.
■ CAUTION:
- Using a compressed air line, pressurize the oil tank through its breather
connection (6) (on the neck of the tank). Adjust the compressor outlet
regulator so that the air line pressure is between 0,4 (6 psi) and 1 bar (15 psi).
Do not exceed 1 bar (15 psi).
◆ NOTE:
▲ WARNING: Do not remove oil tank or cover before ensuring that air
- The pressure in the oil tank has to be maintained during the following step.
■ CAUTION:
- Turn the engine by hand in direction of normal rotation until the first pressure
indication on the oil pressure gauge. Normally this will take approx. 20 turns.
Depending on installation it may take up to 60 turns.
■ CAUTION:
Effectivity: 912 Series
Edition 1 / Rev. 0
BRP-Rotax
INSTALLATION MANUAL
Incorrectly connected oil lines to the oil tank or to the engine will
result in severe engine damage.
Prevent entering of foreign substance through spark plug hole.
Oil tank cover is not designed to hold pressure. Some air will
escape.
pressure has been completely released from the tank.
It is possible to empty the oil tank and as a result introduce
more air into the oil system. Pay attention to the oil level and
fill tank as required.
Do not use starter for this purpose. Fit propeller and use it to turn
engine.
page 78
May 01/2007