Today's Message Index:
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1. 05:15 AM - Re: Pre-oiling 912ULS (Thom Riddle)
2. 10:08 AM - Re: Re: Pre-oiling 912ULS (Jim Clayton)
Message 1
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| Subject: | Re: Pre-oiling 912ULS |
Jim,
Roger is correct that you must rotate the engine to get oil through the system
even if externally pressurizing the inlet side of the pump. The reason is that
the oil pump on the front of the engine is a positive displacement pump, which
will allow very little oil (if any) to pass if it is not turning. BTW, when
the engine is running, the inlet side of the oil pump is at lower than atmospheric
pressure, never pressurized.
I'm not recommending this but you could pressurize the oil system on the outlet
side of the pump through the oil pressure relief valve port. If you do this,
make sure you remove the relief valve and spring and that the applied pressure
is controlled within the allowable range. I don't think it is necessary to do
this but in theory it could be done this way.
With a $20,000 engine, why not just follow the manufacturer's directions? It is
certainly simpler and Rotax doesn't leave much to chance.
--------
Thom Riddle
Buffalo, NY (9G0)
Kolb Slingshot SS-021
Jabiru 2200A #1574
Diamond Katana DA20-A1
Rotax 912 F3
Don't worry about old age... it doesn't last very long.
- Anonymous
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=386100#386100
Message 2
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| Subject: | Re: Pre-oiling 912ULS |
Thom, Roger:
Appreciate the confirmation and suggestions! Point certainly taken regarding adherence
to the Rotax procedure. My problem is I waited so long to maintain this
engine I am concerned the journals will score if I rotate the engine without
adding oil first. I regret not following the Rotax procedure 5 years ago.
I had the same though with regard to pressurizing the upstream side of the galley,
and am studying the gallery details in the manual now.
Thanks all, and have a great weekend.
-Jim
--- On Sat, 10/27/12, Thom Riddle <riddletr@gmail.com> wrote:
> From: Thom Riddle <riddletr@gmail.com>
> Subject: RotaxEngines-List: Re: Pre-oiling 912ULS
> To: rotaxengines-list@matronics.com
> Date: Saturday, October 27, 2012, 5:14 AM
> --> RotaxEngines-List message
> posted by: "Thom Riddle" <riddletr@gmail.com>
>
> Jim,
> Roger is correct that you must rotate the engine to get oil
> through the system even if externally pressurizing the inlet
> side of the pump. The reason is that the oil pump on
> the front of the engine is a positive displacement pump,
> which will allow very little oil (if any) to pass if it is
> not turning. BTW, when the engine is running, the inlet side
> of the oil pump is at lower than atmospheric pressure, never
> pressurized.
>
> I'm not recommending this but you could pressurize the oil
> system on the outlet side of the pump through the oil
> pressure relief valve port. If you do this, make sure you
> remove the relief valve and spring and that the applied
> pressure is controlled within the allowable range. I don't
> think it is necessary to do this but in theory it could be
> done this way.
>
> With a $20,000 engine, why not just follow the
> manufacturer's directions? It is certainly simpler and Rotax
> doesn't leave much to chance.
>
> --------
> Thom Riddle
> Buffalo, NY (9G0)
>
> Kolb Slingshot SS-021
> Jabiru 2200A #1574
>
> Diamond Katana DA20-A1
> Rotax 912 F3
>
> Don't worry about old age... it doesn't last very long.
> - Anonymous
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=386100#386100
>
>
>
>
>
>
>
> RotaxEngines-List Email Forum -
> - MATRONICS WEB FORUMS -
> List Contribution Web Site -
> -Matt
> Dralle, List Admin.
>
>
>
>
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