---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Sat 10/27/12: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:15 AM - Re: Pre-oiling 912ULS (Thom Riddle) 2. 10:08 AM - Re: Re: Pre-oiling 912ULS (Jim Clayton) ________________________________ Message 1 _____________________________________ Time: 05:15:24 AM PST US Subject: RotaxEngines-List: Re: Pre-oiling 912ULS From: "Thom Riddle" 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 _____________________________________ Time: 10:08:49 AM PST US From: Jim Clayton Subject: Re: RotaxEngines-List: 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 wrote: > From: Thom Riddle > 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" > > 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. > > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.