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recapen(at)earthlink.net
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 Posted: Fri Sep 01, 2006 7:47 am Post subject: CS Crankshaft end - what's it look like |
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Reposting since my original post failed to make it......
Fellow listers,
I'm trying to determine what the prop end of the crankshaft is supposed to look
like when it is set up for a constant speed prop.
Folks have written about plugs - but that doesn't tell me what to look for.
If it's plugged, should I only see the plug? If it's not plugged, what
does the inside look like?
FWIW, I'm not seeing 'just a plug' - I'm seeing stuff in there -
looks like a bar going across with a notch cut in to it...maybe to allow a tool
to get all the way in to the back.
Anyone have any drawings or photographs?
I know this is one that I don't want to have the wrong way...
Thanks,
Ralph Capen
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rhdudley1(at)bellsouth.ne
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| Posted: Fri Sep 01, 2006 8:44 am Post subject: CS Crankshaft end - what's it look like |
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Ralph,
In my new Lyc. O-320 D1A from Van's, as received, the plug was an
approximately 50mil thick steel disc within an inch or so of the open
end of the crankshaft. It was slightly convex toward the open end. When
the plug is removed, the shaft end is open for some distance in. I have
not looked for or measured just how far in the shaft is hollow.
To prepare for my C/S prop, I followed the Orndorf video which suggested
using a sharp punch to penetrate the center of the disc and work it out
of the crankshaft opening. It came out quite easily. Be prepared for oil
to flow out of the crankshaft when the disc is removed.
Hope this is helpful
Richard Dudley
-6A flying
n
Ralph E. Capen wrote:
| Quote: |
Reposting since my original post failed to make it......
Fellow listers,
I'm trying to determine what the prop end of the crankshaft is supposed to look
like when it is set up for a constant speed prop.
Folks have written about plugs - but that doesn't tell me what to look for.
If it's plugged, should I only see the plug? If it's not plugged, what
does the inside look like?
FWIW, I'm not seeing 'just a plug' - I'm seeing stuff in there -
looks like a bar going across with a notch cut in to it...maybe to allow a tool
to get all the way in to the back.
Anyone have any drawings or photographs?
I know this is one that I don't want to have the wrong way...
Thanks,
Ralph Capen
|
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pitts_pilot(at)bellsouth.
Guest
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| Posted: Fri Sep 01, 2006 10:57 am Post subject: CS Crankshaft end - what's it look like |
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Richard Dudley wrote:
| Quote: |
Ralph,
In my new Lyc. O-320 D1A from Van's, as received, the plug was an
approximately 50mil thick steel disc within an inch or so of the open
end of the crankshaft. It was slightly convex toward the open end.
When the plug is removed, the shaft end is open for some distance in.
I have not looked for or measured just how far in the shaft is hollow.
|
It's hollow all the way through to the first crank throw.
| Quote: | To prepare for my C/S prop, I followed the Orndorf video which
suggested using a sharp punch to penetrate the center of the disc and
work it out of the crankshaft opening. It came out quite easily. Be
prepared for oil to flow out of the crankshaft when the disc is removed.
|
Hmmm. I may be wrong, but when a hollow crank (for a controllable pitch
prop) is set up for a fixed pitch prop, the plug (looks like a standard
soft plug from your car engine ...... and just may be the same!) is put
in and no plug is placed in the other end ..... to prevent high oil
pressure in the cavity that may blow out that front seal.
To convert back to a CS prop, the front seal is removed and the rear
seal is put in place ..... to make a cavity that can be presurized for
the CS prop.
Linn
do not archive
| Quote: |
Hope this is helpful
Richard Dudley
-6A flying
n
Ralph E. Capen wrote:
>
>
> Reposting since my original post failed to make it......
>
> Fellow listers,
>
> I'm trying to determine what the prop end of the crankshaft is
> supposed to look
> like when it is set up for a constant speed prop.
>
> Folks have written about plugs - but that doesn't tell me what to
> look for. If it's plugged, should I only see the plug? If it's not
> plugged, what does the inside look like?
>
> FWIW, I'm not seeing 'just a plug' - I'm seeing stuff in there -
> looks like a bar going across with a notch cut in to it...maybe to
> allow a tool to get all the way in to the back.
>
> Anyone have any drawings or photographs?
>
> I know this is one that I don't want to have the wrong way...
>
> Thanks,
> Ralph Capen
>
>
>
>
|
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dale1rv6(at)comcast.net
Guest
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| Posted: Fri Sep 01, 2006 12:13 pm Post subject: CS Crankshaft end - what's it look like |
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Hi Ralph,
The bar you see is a spray bar. About 7 or 8 inches back. Farther in, about
an inch is a plug. For a CS prop the plug should be closed, no hole, to
maintain oil pressure to control the prop. If your engine had a fixed prop
before they were supposed to pierce the plug to avoid oil leaks against an
unsealed prop. I changed from fixed to CS and removed the rear plug (which
had been pierced)and replaced with a new one. Lycoming cautions to treat the
spray bar like glass, if it is damaged the crank must be sent to the factory
to replace. I can send you some pics. Your crank also has a place for an
outer seal to be used with a fixed prop. It is placed less than an inch from
the prop end of the crank and keeps the oil in.
Dale
Do not archive
--
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Dale Ensing
Joined: 11 Jan 2006
Posts: 571
Location: Aero Plantation Weddington NC
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| Posted: Fri Sep 01, 2006 1:29 pm Post subject: CS Crankshaft end - what's it look like |
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Ralph,
As Dale Walter stated, the new plug must go behind the spray bar for the C/S
prop setup. You can make a long handle hook from stiff SS wire that will
pull out the old pierced plug that is probably still in there.
To get the new plug into place, carefully slide the new plug into the crank
cavity and up behind the spray bar. This can be done with the plug lying
flat and the crank positioned so the spray bar is horizontal. To set the
plug into the recessed area in the crank, I made a tool from a cheap socket
that would just fit/slide inside the crank cavity. I ground relief slots in
the socket sides180 degrees apart that would fit over the spray bar and yet
allow the "tool" to press the new plug in place. Using a long extension on
the socket I tapped the new plug into place.
I am sure someone makes an expensive tool to do this but my homebuilders
tool worked very well.
Can send you a pict of the tool if you need. Also, somewhere in my notes, I
have the dimension from the flange to the plug to help assure that the plug
is all the way into the recess.
Dale Ensing
| Quote: | Hi Ralph,
The bar you see is a spray bar. About 7 or 8 inches back. Farther in,
about
|
| Quote: | an inch is a plug. For a CS prop the plug should be closed, no hole, to
maintain oil pressure to control the prop. If your engine had a fixed prop
before they were supposed to pierce the plug to avoid oil leaks against an
unsealed prop. I changed from fixed to CS and removed the rear plug (which
had been pierced)and replaced with a new one. Lycoming cautions to treat
the
|
| Quote: | spray bar like glass, if it is damaged the crank must be sent to the
factory
|
| Quote: | to replace. I can send you some pics. Your crank also has a place for an
outer seal to be used with a fixed prop. It is placed less than an inch
from
|
| Quote: | the prop end of the crank and keeps the oil in.
Dale
> I'm trying to determine what the prop end of the crankshaft is supposed
to
|
| Quote: | look
like when it is set up for a constant speed prop.
Folks have written about plugs - but that doesn't tell me what to look
for.
|
| Quote: | If it's plugged, should I only see the plug? If it's not plugged, what
does the inside look like?
FWIW, I'm not seeing 'just a plug' - I'm seeing stuff in there -
looks like a bar going across with a notch cut in to it...maybe to allow a
tool
to get all the way in to the back.
Anyone have any drawings or photographs?
I know this is one that I don't want to have the wrong way...
Thanks,
Ralph Capen
|
| | - The Matronics RV-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?RV-List |
|
_________________
Dale Ensing
RV-6A
Aero Plantation
Weddington NC |
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rickgray(at)adelphia.net
Guest
|
| Posted: Fri Sep 01, 2006 3:30 pm Post subject: CS Crankshaft end - what's it look like |
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|
Forget the 'stiff wire' to remove the old plug from behind the sludge tube....the wire will just keep bending back and pulling out of the hole. Best way to remove the plug is to borrow a dent puller from your local body shop...or make your own. You simply pierce a hole in the plug (if there isn't one or if the existing hole is inadequate), screw in the threaded end (screw) of the dent puller, and give it a little whack. The plug will come out in a New York minute.
Rick in Ohio at the Buffalo Farm - Ohio Valley RVators
http://rv6rick.tripod.com/ohiovalleyrvators/
for the archives
| Quote: | Ralph,
As Dale Walter stated, the new plug must go behind the spray bar for the C/S
prop setup. You can make a long handle hook from stiff SS wire that will
pull out the old pierced plug that is probably still in there.
To get the new plug into place, carefully slide the new plug into the crank
cavity and up behind the spray bar. This can be done with the plug lying
flat and the crank positioned so the spray bar is horizontal. To set the
plug into the recessed area in the crank, I made a tool from a cheap socket
that would just fit/slide inside the crank cavity. I ground relief slots in
the socket sides180 degrees apart that would fit over the spray bar and yet
allow the "tool" to press the new plug in place. Using a long extension on
the socket I tapped the new plug into place.
I am sure someone makes an expensive tool to do this but my homebuilders
tool worked very well.
Can send you a pict of the tool if you need. Also, somewhere in my notes, I
have the dimension from the flange to the plug to help assure that the plug
is all the way into the recess.
Dale Ensing
> Hi Ralph,
> The bar you see is a spray bar. About 7 or 8 inches back. Farther in,
about
> an inch is a plug. For a CS prop the plug should be closed, no hole, to
> maintain oil pressure to control the prop. If your engine had a fixed prop
> before they were supposed to pierce the plug to avoid oil leaks against an
> unsealed prop. I changed from fixed to CS and removed the rear plug (which
> had been pierced)and replaced with a new one. Lycoming cautions to treat
the
> spray bar like glass, if it is damaged the crank must be sent to the
factory
> to replace. I can send you some pics. Your crank also has a place for an
> outer seal to be used with a fixed prop. It is placed less than an inch
from
> the prop end of the crank and keeps the oil in.
> Dale
>
> > I'm trying to determine what the prop end of the crankshaft is supposed
to
> look
> like when it is set up for a constant speed prop.
>
> Folks have written about plugs - but that doesn't tell me what to look
for.
> If it's plugged, should I only see the plug? If it's not plugged, what
> does the inside look like?
>
> FWIW, I'm not seeing 'just a plug' - I'm seeing stuff in there -
> looks like a bar going across with a notch cut in to it...maybe to allow a
> tool
> to get all the way in to the back.
>
> Anyone have any drawings or photographs?
>
> I know this is one that I don't want to have the wrong way...
>
> Thanks,
> Ralph Capen
>
>
>
>
>
>
>
>
>
>
>
|
| | - The Matronics RV-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?RV-List |
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