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rowlandcarson(at)gmail.co
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 Posted: Wed Apr 19, 2017 11:43 am Post subject: oil sump banjo orientation |
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On my Rotax 912S the outlet of the banjo fitting on the oil sump points forward. The pipe connected to it goes aft to starboard. The manual (Fig 7, page 5-5, 912S Installation) shows it pointing about 45 degrees forward and starboard. It looks as though it would be sensible to re-orient the banjo to point about 45 degrees aft and starboard. Is this a good or bad idea?
in friendship
Rowland
| Rowland Carson ... that's Rowland with a 'w' ...
| <rowlandcarson(at)gmail.com> http://www.rowlandcarson.org.uk
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JonathanMilbank
Joined: 14 Apr 2012
Posts: 391
Location: Aberdeen area
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| Posted: Wed Apr 19, 2017 1:10 pm Post subject: Re: oil sump banjo orientation |
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Rowland. When I installed my engine recently I also needed to re-orientate the banjo. What I found was that it's really awkward under the crankcase because of its shape and the potential for the hose clip to get in the way and the difficulty of manipulating a screwdriver, all affected by the angle of the banjo in relation to projecting parts of the casing.
So I loosened the banjo quite a lot and first fitted the hose clip in such a way that the screwdriver would have good access, tightened the clip and then positioned the banjo in a position as near as practicable to the way it needed to point.
After the final tighten and wire-locking of the banjo, I could then focus on routing the oil hose as required.
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rlborger(at)mac.com
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| Posted: Wed Apr 19, 2017 1:10 pm Post subject: oil sump banjo orientation |
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Rowland,
FWIW, on my 914, I left the banjo fitting as it was and ran the return line forward, up the port front and across the top of the engine back to the oil reservoir inlet. The hose is covered with heat shield near exhaust pipes.
Perhaps if I did it again, I’d obtain the necessary crush washers and reorient the banjo to point aft toward the reservoir for a shorter run.
In any case, make sure you apply heat shield when close to hot stuff.
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop (75 hrs).
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger(at)mac.com
On Apr 19, 2017, at 2:41 PM, Rowland Carson <rowlandcarson(at)gmail.com> wrote:
On my Rotax 912S the outlet of the banjo fitting on the oil sump points forward. The pipe connected to it goes aft to starboard. The manual (Fig 7, page 5-5, 912S Installation) shows it pointing about 45 degrees forward and starboard. It looks as though it would be sensible to re-orient the banjo to point about 45 degrees aft and starboard. Is this a good or bad idea?
in friendship
Rowland
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kingsnjan(at)westnet.com.
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| Posted: Thu Apr 20, 2017 4:39 pm Post subject: oil sump banjo orientation |
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< On my Rotax 912S the outlet of the banjo fitting on the oil sump points forward. The pipe connected to it goes aft to starboard. The manual (Fig 7, page 5-5, 912S Installation) shows it pointing about 45 degrees forward and starboard. It looks as though it would be sensible to re-orient the banjo to point about 45 degrees aft and starboard. Is this a good or bad idea?
Rowland,
I remember reading in a Europa Tech Talk (or similar) several years ago to install the banjo such that the oil return hose takes the shortest route to get away from the muffler. Unfortunately, a protrusion on the sump precludes running the hose fully to the rear. In other words, set the banjo in order to run the hose the best way you can to avoid heat sources.
From my experience with our 914 Mono, may I make the following suggestions. . . .
- Take your oil return hose and banjo fitting to a hose fitting company and ask them to crimp the hose to your banjo. (This will not only give you a professional job, it will give you more options as to orientation of the banjo and hose exiting the sump and alleviates the need to stuff around with the hose clamp.)
- While at the same hose fitting company, ask for two Dowty washers to use in lieu of the copper washers on the banjo. (when I asked for replacement copper washers, I was in return asked why I was using 1930’s technology?) I had never heard of Dowty washers so if you are like me, check out this link. https://en.wikipedia.org/wiki/Bonded_seal
Regarding your other post about water hoses may I make further suggestions . . . .
- I don’t know what you are using but I suggest at least for the two main water hoses using silicon hoses as supplied by Stefan Ingemarsson. (After blowing on of the hoses as supplied by Europa and finding there was no reinforcement within the rubber, I was horrified so will not use them again)
- When fitting the silicon hoses, just a smear of petroleum jelly around the fitting (and inside the hose) will make the hose slip on much easier.Using water on them also helps but I find the petroleum jelly works better. There is no need for concern that the hoses might slip off again
Best regards
Kingsley in Oz
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