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727gs
Joined: 11 May 2016
Posts: 17
Location: Wadsworth
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 Posted: Fri May 13, 2016 7:35 am Post subject: Oily Prop |
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My Stock CJ prop has been slinging a fine mist of oil from the blade seals, it appears. The local Dramader duster guy does his own props and has offered to help. Anyone have any advice? Are the seals available and easy? Anyone done this? Prop operates normally in flight.
Thanks in advance,
Steve near Chicago
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Steve near Chicago |
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jbsoar(at)gmail.com
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| Posted: Fri May 13, 2016 7:46 am Post subject: Oily Prop |
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The MT propeller, from Germany, solves the oil-slinging problem.
On Fri, May 13, 2016 at 8:35 AM, 727gs <727gs(at)att.net (727gs(at)att.net)> wrote:
| Quote: | --> Yak-List message posted by: "727gs" <727gs(at)att.net (727gs(at)att.net)>
My Stock CJ prop has been slinging a fine mist of oil from the blade seals, it appears. The local Dramader duster guy does his own props and has offered to help. Anyone have any advice? Are the seals available and easy? Anyone done this? Prop operates normally in flight.
Thanks in advance,
Steve near Chicago
--------
Steve near Chicago
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=456190#456190
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draftsjust417(at)gmail.co
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| Posted: Fri May 13, 2016 7:48 am Post subject: Oily Prop |
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Good morning Steve -
Yup, Doug Sapp offers a set of new prop hub seals at a good price. Altho I've not (yet) replaced a set, I'm told its not a difficult task to do.
There's a special tool that's required as well.
Justin
On Fri, May 13, 2016 at 7:35 AM, 727gs <727gs(at)att.net (727gs(at)att.net)> wrote:
| Quote: | --> Yak-List message posted by: "727gs" <727gs(at)att.net (727gs(at)att.net)>
My Stock CJ prop has been slinging a fine mist of oil from the blade seals, it appears. The local Dramader duster guy does his own props and has offered to help. Anyone have any advice? Are the seals available and easy? Anyone done this? Prop operates normally in flight.
Thanks in advance,
Steve near Chicago
--------
Steve near Chicago
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=456190#456190
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FORUMS -
_blank" rel="noreferrer">http://forums.matronics.com
===========
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===========
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-Matt Dralle, List Admin.
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wlannon(at)shaw.ca
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| Posted: Fri May 13, 2016 9:03 am Post subject: Oily Prop |
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Steve;
Not necessarily from the "blade" seals.
Take a very close look at where the oil is exiting at the blade root. If it
is coming from the 3 slots in the blade grip it has nothing to do with the
seals.
In this case the oil is coming directly from the hub. If it is a new or
freshly overhauled prop. you should expect to see oil here for a few hours.
Under centrifugal loading oil will separate from the grease and exit at this
location. That is reason #1 from the slots and is of no concern as it will
dry up.
Reason #2 (from the slots) is different. Oil is still coming directly from
the hub but the source is engine oil leaking from the pitch change INNER
seal (or a leaking transfer tube gasket) into the hub. Unlike OUTER seal
leakage this will not initially be externally evident.
If oil or grease leakage is evident around the blade grip rather than (or in
addition to) the slots the Blade Bearing Grease seals are leaking.
If in doubt remove the pitch change unit and check for oil in the hub.
There should be none. Oil could also leak into the hub from a loose
transfer tube or poor gasket.
Walt
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727gs
Joined: 11 May 2016
Posts: 17
Location: Wadsworth
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| Posted: Fri May 13, 2016 5:42 pm Post subject: Re: Oily Prop |
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Thanks guys.
I'll wipe it down and run it this weekend and pay more attention to where it's coming from.
I appreciate the help and Walt, the exhaust fit fabulously.
Steve
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Steve near Chicago |
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Viperdoc
Joined: 19 Apr 2014
Posts: 484
Location: 08A
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| Posted: Fri May 13, 2016 7:33 pm Post subject: Oily Prop |
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Call Doug Sapp. He should have them
Doc
Sent from my iPad
| Quote: | On May 13, 2016, at 10:35 AM, 727gs <727gs(at)att.net> wrote:
My Stock CJ prop has been slinging a fine mist of oil from the blade seals, it appears. The local Dramader duster guy does his own props and has offered to help. Anyone have any advice? Are the seals available and easy? Anyone done this? Prop operates normally in flight.
Thanks in advance,
Steve near Chicago
--------
Steve near Chicago
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=456190#456190
|
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http://www.matronics.com/Navigator?Yak-List |
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Viperdoc |
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Viperdoc
Joined: 19 Apr 2014
Posts: 484
Location: 08A
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| Posted: Fri May 13, 2016 7:33 pm Post subject: Oily Prop |
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New seals are a hell of a lot cheaper.
Doc
Sent from my iPad
On May 13, 2016, at 10:45 AM, John B <jbsoar(at)gmail.com (jbsoar(at)gmail.com)> wrote:
| Quote: | The MT propeller, from Germany, solves the oil-slinging problem.
On Fri, May 13, 2016 at 8:35 AM, 727gs <727gs(at)att.net (727gs(at)att.net)> wrote:
|
| | - 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:
http://www.matronics.com/Navigator?Yak-List |
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Viperdoc |
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Viperdoc
Joined: 19 Apr 2014
Posts: 484
Location: 08A
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| Posted: Fri May 13, 2016 7:38 pm Post subject: Oily Prop |
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Excellent Walt
Doc
Sent from my iPad
[quote] On May 13, 2016, at 12:02 PM, Walter Lannon <wlannon(at)shaw.ca> wrote:
Steve;
Not necessarily from the "blade" seals.
Take a very close look at where the oil is exiting at the blade root. If it is coming from the 3 slots in the blade grip it has nothing to do with the seals.
In this case the oil is coming directly from the hub. If it is a new or freshly overhauled prop. you should expect to see oil here for a few hours. Under centrifugal loading oil will separate from the grease and exit at this location. That is reason #1 from the slots and is of no concern as it will dry up.
Reason #2 (from the slots) is different. Oil is still coming directly from the hub but the source is engine oil leaking from the pitch change INNER seal (or a leaking transfer tube gasket) into the hub. Unlike OUTER seal leakage this will not initially be externally evident.
If oil or grease leakage is evident around the blade grip rather than (or in addition to) the slots the Blade Bearing Grease seals are leaking.
If in doubt remove the pitch change unit and check for oil in the hub. There should be none. Oil could also leak into the hub from a loose transfer tube or poor gasket.
Walt
--
| | - 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:
http://www.matronics.com/Navigator?Yak-List |
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