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LycomingEngines-List Digest: 1 Msgs - 11/15/07

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capmrp(at)cfu.net
Guest

Posted: Fri Nov 16, 2007 12:15 pm Post subject: LycomingEngines-List Digest: 1 Msgs - 11/15/07

Gents,



I am thinking of changing out the bushings in the prop flange on the  

crank to allow clocking the c/s 2-blade prop to cut down vibrations at  

cruise power.  I have the procedure but since I have never swapped out  

the bushings, I'm wondering if anyone out there can give insight.



1. Are the bushings oversize fit?

2. Are the sides of the bushings textured in any way in order to grip  

the flange tighter ie: make it more difficult to remove?

3. Since the "special tool" for bushing removal/insall costs $1800  

does anyone know of where I can borrow one or of other tools that will  

work just as well?



Any insight would be appreciated.



Thanks.

Mike

capmrp(at)cfu.net

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flyinwithme99(at)yahoo.co
Guest

Posted: Fri Nov 16, 2007 2:55 pm Post subject: LycomingEngines-List Digest: 1 Msgs - 11/15/07

The bushings are an "interference fit"

  The bushings are not "textured", they are held in place by the above interference fit.

   

  I have removed the bushings very easily by using a piece of tubing that just fits over the flange of the bushing on the back side of the crank flange, use a bolt, nut and a washer placed on the front side of the bushing where the washer is slightly smaller than the O.D. of the bushing, and simply using two wrenches to squeeze the nut bolt combination together will force the bushing from the crankflange.

   

  Installation is done by using a bolt that fits the threads in the I.D. of the bushing and placing an appropriate piece of tubing on the front side of the crankflange, insert the bolt throught the tubing, crankflange, and screw into the bushing placed on the back side of the crankflange, pull the bushing into place by turning the bolt.  Lightly oil all  surfaces to keep from galling.  The press fit is not real tight so it should go in easily.

   

  Please be careful of what you may consider "proper clocking" of the prop to the crank.  Use the information from the prop manufacturer if available, or call the prop manufacturer.

   

  Manuel Weber

  A&P 



capmrp(at)cfu.net wrote:

  [quote]--> LycomingEngines-List message posted by: capmrp(at)cfu.net



Gents,



I am thinking of changing out the bushings in the prop flange on the 

crank to allow clocking the c/s 2-blade prop to cut down vibrations at 

cruise power. I have the procedure but since I have never swapped out 

the bushings, I'm wondering if anyone out there can give insight.



1. Are the bushings oversize fit?

2. Are the sides of the bushings textured in       Get easy, one-click access to your favorites.    [quote][b]

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jdhcv(at)yahoo.com
Guest

Posted: Fri Nov 16, 2007 4:05 pm Post subject: LycomingEngines-List Digest: 1 Msgs - 11/15/07

It's pretty easy. Put a socket on the back sid that the bushing will fit through and use a c-clamp to push the bushing out. Hope this helps.

   

  Jack



capmrp(at)cfu.net wrote:

  [quote]--> LycomingEngines-List message posted by: capmrp(at)cfu.net



Gents,



I am thinking of changing out the bushings in the prop flange on the 

crank to allow clocking the c/s 2-blade prop to cut down vibrations at 

cruise power. I have the procedure but since I have never swapped out 

the bushings, I'm wondering if anyone out there can give insight.



1. Are the bushings oversize fit?

2. Are the sides of the bushings textured in any way in order to grip 

the flange tighter ie: make it more difficult to remove?

3. Since the "special tool" for bushing removal/insall costs $1800 

does anyone know of where I can    [quote][b]

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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?LycomingEngines-List

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