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1. 06:37 AM - Re: Pre-oiling 912ULS (FLYaDIVE)
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| Subject: | Re: Pre-oiling 912ULS |
Jim:
As they say your idea is Spot On. The entire idea of Pre-Oiling is to
saturate and cover all the rotating parts PRIOR to rotating the the engine.
To rotate the engine prior to pre-oiling or during pre-oiling is counter
productive.
Since your engine is from 2005 the two questions that come up are:
1 - Where was the engine stored, was it kept in a low humidity area?
2 - Was the engine 'pickled', that is to say - Oiled with
a preservative oil that does not run off the engine areas?
When it comes to 'pickling' a little research has to be done:
1 - Does Rotax make a storage oil? If so use it.
2 - If Rotax does NOT make a storage oil, use any storage oil you can
obtain. Remember you are NOT running on this oil ONLY storing with it.
Yes - You do run the engine for a short time just to coat the insides of
the engine BUT, that is a SHORT TIME and it is WITHOUT LOADS.
Special Note: Take a look at Page 8 - 2 Para 8.2
It states that preservation is for only one year and if stored for more
than one year the preservation procedure should be repeated every year.
Have you been doing that?
If not - Start with that procedure prior to Pre-Oiling.
Why do i say that? Only because Pre-Oiling takes care of the engine NOT
the gearbox gears. Do everything you can to get those gears wet with oil -
SHORT of rotating them - Without oil.
So, how should you Pre-Oil?
1 - Take a look at the manual - Page 7-6 Figure 3 .
2 - Notice the Oil Flow Direction. It goes OUT of the Oil Cooler (item 5)
- Into the Engine - Out of the engine and into the Oil Tank (item 4).
3 - I do not know if the picture I attached will get through. If it does
not contact me directly and I will send it directly to you.
4 - This picture is of a Pre-Oiler I made. It can handle oil pressure up
to 150 PSI. YOU pick the oil pressure your engine operates at and Pre-Oil
at that pressure.
5 - Use the engine operating pressure so any valves will be opened by the
pressure and the oil spray will cover the same areas as during normal
operation.
6 - Since the engine has an Oil Pressure Regulator (item 1), you should
pressure the pre-oiler higher than operating pressure and because the
pressure drops in the pre-oilier quickly as volume of oil drops.
7 - Monitor the Oil Pressure Gauge of the plane/engine, since the Oil
Pressure Sensor (item 2) is hooked up. There will probably be only a small
deflection since the pre-oilier is applying pressure for only a short time.
8 - Now, here I have to ask a question. Does the Oil Pump (item 3) have a
reverse flow check valve? If YES then you are limited to pre-oilier flow
direction.
If NO then - Use the Pre-Oilier in BOTH directions - The IN and the OUT.
9 - When I Pre-Oil, it is done with one (1) quart of oil in each direction
- From the Oil Cooler into the Engine and then Into the Engine on the
OUTPUT side of the Engine. See note 8.
10 - Now, here you have some options:
a> You can leave the Oil Tank (item 4) attached and it will catch any oil
that makes it to the exit of the engine. And remember to hook up a
overflow tube to Vent Tube (item 7). I really doubt if this will ever
happen, or...
b> Put a Plug on the Engine Exit line/hose so it develops a good pressure
to spray the oil all around inside the engine.
The Pictures:
Pic #1 is a general overview
Pic #2 shows the fittings. One thing you can not see is the inside of the
unit. From the oil line on the outside is a nylon pick-up tube that goes
to the bottom of the unit.
You will see a Shrader valve on top. I hook up a 12VDC portable tire pump.
Pressurize the unit to 125 PSI, you can leave the tire pump on and running
when you open the valve.
This system is so easy that I pre-oil anytime the engine sits for a month
or more.
Barry
On Fri, Oct 26, 2012 at 5:13 PM, Jim Clayton <jspc78@yahoo.com> wrote:
>
> Greetings all:
>
> I looked in the archives and didn't see an answer so here goes:
>
> I have a 912ULS, in the crate I bought it in 2005. I just unwrapped it
> and would like to pressurize the oil system with engine oil since the
> engine has been sitting so long and I am very concerned about roating the
> engine (dry) to get the internal pump to move oil. I have a 12 volt oil
> pump, return tank and accessories to accomplish this, however I have a
> question:
>
> Can I simply feed the oil pump inlet hose-barb with oil pressure to
> circulate oil throughout the gallery? I am concerned the pump will not
> pass oil if the engine is not turning.
>
> Alternately I could remove the pressure sender and feed the gallery from
> there unless there is some reason not to. My preference is to feed through
> the larger oil pump inlet in the hipe of greater flow through the gallery.
>
> I plan to return the oil by draining the crankcase through the return
> hosebarb and back into the return tank.
>
> Any thoughts or suggestions to circulate oil through my engine?
>
> Thanks, Jim
>
> Kolb Mark3X
> 912ULS
> 80% completed
>
>
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