Hi! Remi.
The official Rotax plan to bleed the oil cooler calls for the top of the
tank to be pressurized (so you are correct partly ) however it is not to
use all the oil in the tank or the oil system would be taking in air
defeating the objective of bleeding the cooler. Having embarked on bleeding
the oil cooler provided the tank level remains adequate and is topped up to
remain sure the oil cooler is evacuated of air,( that should be sufficient
to achieve oil pressure on the instrument) then replace the ignition plugs
and top up with oil which will pressure oil from the sump to the oil pump
and so evacuate the sump again.( BUT BE SURE NOT TO FINISH UP WITH THE TANK
OVER FILLED!)( Almost wish I hadn't entered into this issue !)
Regards to all
Bob Harrison G-PTAG
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Remi Guerner
Sent: 21 May 2019 08:18
Subject: Europa-List: Re: Fly day
A word of caution here: assuming we are talking about a Rotax, without the
spark plugs, there is no blow-by to pressurize the crankcase, so the oil is
not returned to the tank. Therefore the tank may become empty and you pump
air into the oil circuit. The crankcase may be flooded.
To use this method safely, you need to disconnect the oil return line and
set it so that the oil is drained from the crankcase by gravity, and refill
the oil tank at the same time to keep the oil level high enough.
Remi
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=489315#489315
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