Checking Of The Lubrication System; 1) Measuring Of The Vacuum - Rotax 912 Series Installation Manual

13.3) Checking of the lubrication system

To control the proper function of the lubrication system the following readings
have to be taken on the running engine as part of the test/qualification
procedure.
◆ NOTE:

13.3.1) Measuring of the vacuum

max. 0.3 bar (4.35 psi) below atmospheric pressure
Effectivity: 912 Series
Edition 1 / Rev. 0
BRP-Rotax
INSTALLATION MANUAL
The required pressure gauges and connection parts are not
included in the BRP-Rotax engine delivery.
Measuring of vacuum in the oil suction line (1) (line from oil tank to oil
pump via oil cooler) at a max. distance of 100 mm (4 in) from pump inlet
(2).
At take-off performance the indicated vacuum (3) must not be more
than 0,3 bar (4.35 psi) otherwise the oil hose (1) could collapse and thus
blocking the oil supply to the engine (Fig. 41).
▲ WARNING: The vacuum (3) must be verified over the total range
of engine operation. Specially on cold oil temperature
the flow resistance increases, so that not enough oil
can flow on suction side.
1
3
2
Fig. 41
09161
page 69
May 01/2007