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Prop piston cup[LashBack]

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dsavarese(at)elmore.rr.co
Guest

Posted: Thu Aug 17, 2006 4:10 pm Post subject: Prop piston cup[LashBack]

Be very careful because if you take too much material off the dome/cup 

interior, the large seal on the piston will not seal properly and you will 

have a constant oil leak from around the dome.  Replacing the seal with a 

new seal will not fix the problem.  You may be better off buying a 

new/reconditioned piston and dome.

Dennis



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dsavarese(at)elmore.rr.co
Guest

Posted: Thu Aug 17, 2006 5:41 pm Post subject: Prop piston cup[LashBack]

I'm assuming a cup/dome can be turned only "x" number of thousands.  But I 

do not have those specifications available.  I also do not know the 

procedure for reconditioning.  Most likely though, it's a resurface only to 

the maximum inside diameter.  If the dome is scored, it usually means the 

inner seal on the piston was probably badly worn.  A worn inner seal usually 

permits oil to leak into the hub where it then shows up at the sawtooth 

mating surface of the prop flange/hub.



Call Doug Sapp or Carl or Jill Hays for a price on the hub dome.

Dennis



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JBernier(at)dart.org
Guest

Posted: Fri Aug 18, 2006 4:32 am Post subject: Prop piston cup[LashBack]

 	  Quote: 	
		  >> dsavarese(at)elmore.rr.com 08/17/06 8:39 PM >>>

	




I'm assuming a cup/dome can be turned only "x" number of thousands.  But I 

do not have those specifications available.  I also do not know the 

procedure for reconditioning.  Most likely though, it's a resurface only to 

the maximum inside diameter.  If the dome is scored, it usually means the 

inner seal on the piston was probably badly worn.  A worn inner seal usually 

permits oil to leak into the hub where it then shows up at the sawtooth 

mating surface of the prop flange/hub.



Call Doug Sapp or Carl or Jill Hays for a price on the hub dome.

Dennis



---

- 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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JBernier(at)dart.org
Guest

Posted: Fri Aug 18, 2006 4:49 am Post subject: Prop piston cup[LashBack]

Sorry, spoke to soon.



What I wanted to say was, if a thousand or so is enough to clean it up, and it is out of tolerance, can it be chromed? And at what cost? If it can be found new or servicable used, then it is likely that this would be the better alternative.

IMHO

Jim B



 	  Quote: 	
		  >> JBernier(at)dart.org 08/18/06 7:32 AM >>>

	




 	  Quote: 	
		  >> dsavarese(at)elmore.rr.com 08/17/06 8:39 PM >>>

	




I'm assuming a cup/dome can be turned only "x" number of thousands.  But I 

do not have those specifications available.  I also do not know the 

procedure for reconditioning.  Most likely though, it's a resurface only to 

the maximum inside diameter.  If the dome is scored, it usually means the 

inner seal on the piston was probably badly worn.  A worn inner seal usually 

permits oil to leak into the hub where it then shows up at the sawtooth 

mating surface of the prop flange/hub.



Call Doug Sapp or Carl or Jill Hays for a price on the hub dome.

Dennis



---

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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:

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dsavarese(at)elmore.rr.co
Guest

Posted: Fri Aug 18, 2006 5:00 am Post subject: Prop piston cup[LashBack]

If aluminum can be chromed, then the dome could be chromed.  I have no idea 

what the cost would be though.  I think purchasing a new or reconditioned 

unit would be less costly and certainly the turn around time would be much 

faster too.

Dennis



---

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