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wise(at)txc.net.au
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 Posted: Sat Jul 25, 2009 1:42 pm Post subject: Front prop shaft seal |
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G'Day,
The prop shaft front seal my friends Yak 18T has decided to have a hemorrhage and is leaking like a sieve.
We are about to remove the front section and replace the seal.
Have any of you done this seal replacement and if so, are there any intricate snags that we should be aware of?
Any advice before we start this job would be greatly appreciated.
Thanks and cheers,
Chris.
[quote][b]
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cjpilot710(at)aol.com
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| Posted: Sun Jul 26, 2009 4:47 am Post subject: Front prop shaft seal |
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That seal is sort of like a V shape. Make sure you put it in correctly OR she'll hemorrhage worse than before.
Also, its good idea to take a very fine emery cloth and remove any scratches or sharp edges on sides that the piston rides in. It is surprising to me that they show up there but its common and usually the cause of a lot of leaks.
Should take you :30 to :45 minutes to do.
Jim "Pappy" Goolsby
In a message dated 7/25/2009 5:43:39 P.M. Eastern Daylight Time, wise(at)txc.net.au writes:
| Quote: | G'Day,
The prop shaft front seal my friends Yak 18T has decided to have a hemorrhage and is leaking like a sieve.
We are about to remove the front section and replace the seal.
Have any of you done this seal replacement and if so, are there any intricate snags that we should be aware of?
Any advice before we start this job would be greatly appreciated.
Thanks and cheers,
Chris.
|
A00126575x1221323048x1201367271/aol?redir=http://www.freecreditreport.com/pm/default.aspx?sc=668072&hmpgID=62&bcd=JulyExcfooterNO62>See Yours in Just 2 Easy Steps!
[quote][b]
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cjpilot710(at)aol.com
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| Posted: Sun Jul 26, 2009 4:48 am Post subject: Front prop shaft seal |
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Oooooops.
I thinks I was talking about the wrong problem! Me thinks I was talking about the prop seal. Disregard last post.
Jim "Pappy" Goolsby
In a message dated 7/25/2009 5:43:39 P.M. Eastern Daylight Time, wise(at)txc.net.au writes:
| Quote: | G'Day,
The prop shaft front seal my friends Yak 18T has decided to have a hemorrhage and is leaking like a sieve.
We are about to remove the front section and replace the seal.
Have any of you done this seal replacement and if so, are there any intricate snags that we should be aware of?
Any advice before we start this job would be greatly appreciated.
Thanks and cheers,
Chris.
|
A00126575x1221323048x1201367271/aol?redir=http://www.freecreditreport.com/pm/default.aspx?sc=668072&hmpgID=62&bcd=JulyExcfooterNO62>See Yours in Just 2 Easy Steps!
[quote][b]
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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dsavarese0812(at)bellsout
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| Posted: Sun Jul 26, 2009 5:33 am Post subject: Front prop shaft seal |
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Copy that. Disregard my reply please Pappy.
Dennis
[quote] ---
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dsavarese0812(at)bellsout
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| Posted: Sun Jul 26, 2009 5:33 am Post subject: Front prop shaft seal |
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Pappy,
I believe he was asking about the prop SHAFT seal. Not the prop hub piston/dome seal. That's definitely not a 30-45 minute job.
Dennis
[quote] ---
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wlannon(at)persona.ca
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| Posted: Sun Jul 26, 2009 10:43 am Post subject: Front prop shaft seal |
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Have you checked the M14P Manual. If you are describing a leak from the area of the engine front section (gearbox) immediately behind the propellor mounting flange it is possible that there is no seal to change.
That would be the case with Pratt & Whitney engines that rely on a "slinger ring" to return thrust bearing lube oil to the crank case.
Since I do not have the manual in front of me I don't know if that is the case with the M14P. If it is you may want to consider the possibility of a front case vent problem.
Walt
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mark.bitterlich(at)navy.m
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| Posted: Mon Jul 27, 2009 9:13 am Post subject: Front prop shaft seal |
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There is a front case seal on the M-14 that becomes especially pronounced when you do aerobatics. The seal is rather interesting to replace and requires a special tool to get at. It is a round like a big socket, but has "segmented teeth" on the front of it to mate with the part on the aircraft that you have to loosen up. This thing has some serious torque on it and requires a long breaker bar to turn while removing.
I know Sergei Boriak and Hubie Tolson had to replace theirs, and I watched them doing it. Also Vladimir Yastremski might know where to find one. The tool required is hard to get ahold of and is NOT in the normal toolboxes.
Mark Bitterlich
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