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Alternator pulley and flywheel misalignment

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sfarner(at)gmail.com
Guest

Posted: Wed May 03, 2006 2:16 pm Post subject: Alternator pulley and flywheel misalignment

Listers,



I was installing the alternator (60 amp from Van's) on my IO-390 using the

supplied bracket and noticed that the alternator pulley is offset about

5/16" forward of the flywheel. The bracket also overhangs the boss mount on

the engine by about this amount, and there is the same deal on the bracket

connecting the alternator to the starter.



Here is a picture of what I am talking about:



www.scottfarner.com/altflywheel.JPG



Anybody run in to this problem and come up with a fix?



Thanks,



Scott Farner

www.scottfarner.com

RV-7A Engine

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erichweaver(at)cox.net
Guest

Posted: Wed May 03, 2006 3:11 pm Post subject: alternator pulley and flywheel misalignment

Scott:



Hope I dont insult your intellignece here, but make sure the ring gear/prop flange is oriented on the mounting bushings correctly and is firmly pressed into place.  One of the mounting bushings is slightly oversized, so it only fits correctly when you have the bushings in the correct hole.  Took me awhile to realize that.  Once I got it on correctly, I found the small index marks that indicate how they line up....Duhhhhh!  .  And then, voila!  - my alternator pulley instantly came into the proper alignment.



If you have already taken all this into account, you need someone smarter than me



regards



Erich Weaver

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jhstarn(at)verizon.net
Guest

Posted: Wed May 03, 2006 4:52 pm Post subject: alternator pulley and flywheel misalignment

Had the same problem with the same fix. ("What'da mean it don't fit right 

?") When properly aligned the ring on our IO-540 J4A5 when on with a real 

solid "clunk" with NO wobble/wiggle what so ever, there are five ways of 

doing it wrong and only one way to do it right. OR you may have to go a 

local alternator rebuild shop & change out the pulley (local yellow pages). 

KABONG  Do Not Archive



Subject: alternator pulley and flywheel misalignment

 	  Quote: 	
		   Hope I dont insult your intellignece here, but make sure the ring 

 gear/prop flange is oriented on the mounting bushings correctly and is 

 firmly pressed into place.  One of the mounting bushings is slightly 

 oversized, so it only fits correctly when you have the bushings in the 

 correct hole.  Took me awhile to realize that.  Once I got it on 

 correctly, I found the small index marks that indicate how they line 

 up....Duhhhhh!  .  And then, voila!  - my alternator pulley instantly came 

 into the proper alignment.



 If you have already taken all this into account, you need someone smarter 

 than me



 regards



 Erich Weaver

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jsflyrv(at)verizon.net
Guest

Posted: Wed May 03, 2006 5:07 pm Post subject: Alternator pulley and flywheel misalignment

Scott Farner wrote:



 	  Quote: 	
		  



Listers,



I was installing the alternator (60 amp from Van's) on my IO-390 using the

supplied bracket and noticed that the alternator pulley is offset about

5/16" forward of the flywheel. The bracket also overhangs the boss mount on

the engine by about this amount, and there is the same deal on the bracket

connecting the alternator to the starter.



Here is a picture of what I am talking about:



www.scottfarner.com/altflywheel.JPG



Anybody run in to this problem and come up with a fix?



Thanks,



Scott Farner

www.scottfarner.com

RV-7A Engine





 

 



On the IO 390 is the alternator mounted on the opposite side of what it 
	


is mounted on a O-360?

I know that on my airplane the alternator is on the right side of the 

engine looking from cockpit.

Maybe the difference? Or is your mount made for a IO-390?

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dan(at)rvproject.com
Guest

Posted: Wed May 03, 2006 6:00 pm Post subject: Alternator pulley and flywheel misalignment

 	  Quote: 	
		   On the IO 390 is the alternator mounted on the opposite side of what it

 is mounted on a O-360?

 I know that on my airplane the alternator is on the right side of the

 engine looking from cockpit.

 Maybe the difference? Or is your mount made for a IO-390?


	


Looks like Scott's photo was from the bottom looking up.  And to the 

previous poster, if the flywheel weren't engaged fully with the prop flange 

bushings, he would have the opposite problem.



Scott, I wish I had some advice for you.other than...it looks like that 

alternator/bracket setup isn't gonna work (duh, sorry to state the obvious). 

FWIW, the B&C alternator & bracket worked out of the box on my IO-360-A1B6 

(which I believe is the same external form factor as your case).  On that 

setup the alternator goes on the "inside" of the bracket.



http://rvimg.com/images/2003/20030720_alternator_in_place.jpg



I assume you could fabricate a similar U bracket to work with your setup, 

but you may not be able to use the cross brace to the starter.



Hopefully somebody out there who used Van's alternator on an angle valve 

engine can come up with something simple.  Otherwise you could always just 

go with a tried and true B&C...  



)_( Dan

RV-7 N714D (888 hours)

http://www.rvproject.com

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yenduc(at)sbcglobal.net
Guest

Posted: Wed May 03, 2006 7:16 pm Post subject: Alternator pulley and flywheel misalignment

I ran into the same problem last week with my RV 7A with a superior  

io 360.

I cut a spacer out of 1/4" aluminum stock to fill the gap --- it  

worked just fine.  Check

the length of the bolt  to make sure you have enough threads for a  

good grip --

you may need to get a longer bolt -- mine fit fine.  I note that  

others have made a

double bend (an "S") in the brace to accommodate the gap.



Dave(at) RAL



On May 3, 2006, at 3:11 PM, Scott Farner wrote:



 	  Quote: 	
		   



 Listers,



 I was installing the alternator (60 amp from Van's) on my IO-390  

 using the

 supplied bracket and noticed that the alternator pulley is offset  

 about

 5/16" forward of the flywheel. The bracket also overhangs the boss  

 mount on

 the engine by about this amount, and there is the same deal on the  

 bracket

 connecting the alternator to the starter.



 Here is a picture of what I am talking about:



 www.scottfarner.com/altflywheel.JPG



 Anybody run in to this problem and come up with a fix?



 Thanks,



 Scott Farner

 www.scottfarner.com

 RV-7A Engine

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yenduc(at)sbcglobal.net
Guest

Posted: Wed May 03, 2006 8:37 pm Post subject: Alternator pulley and flywheel misalignment

Scott:



I just took another look at your picture.  I thought you were  

referring to the

gap and not the misalignment.   It looks like your ring gear is

pushed all the way on and sets inside of the alt pulley.  I just  

looked at mine.

Your 60 amp alt looks a bit different than mine and protrudes further  

forward from

the mounting boss.  You might want to give Vans a call.



Sorry

dave



On May 3, 2006, at 8:13 PM, Dave Cudney wrote:



 	  Quote: 	
		   



 I ran into the same problem last week with my RV 7A with a superior

 io 360.

 I cut a spacer out of 1/4" aluminum stock to fill the gap --- it

 worked just fine.  Check

 the length of the bolt  to make sure you have enough threads for a

 good grip --

 you may need to get a longer bolt -- mine fit fine.  I note that

 others have made a

 double bend (an "S") in the brace to accommodate the gap.



 Dave(at) RAL



 On May 3, 2006, at 3:11 PM, Scott Farner wrote:

> 

>

> Listers,

>

> I was installing the alternator (60 amp from Van's) on my IO-390

> using the

> supplied bracket and noticed that the alternator pulley is offset

> about

> 5/16" forward of the flywheel. The bracket also overhangs the boss

> mount on

> the engine by about this amount, and there is the same deal on the

> bracket

> connecting the alternator to the starter.

>

> Here is a picture of what I am talking about:

>

> www.scottfarner.com/altflywheel.JPG

>

> Anybody run in to this problem and come up with a fix?

>

> Thanks,

>

> Scott Farner

> www.scottfarner.com

> RV-7A Engine

>

- 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:

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