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sfarner(at)gmail.com Guest
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Posted: Wed May 03, 2006 2:16 pm Post subject: Alternator pulley and flywheel misalignment |
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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
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Posted: Wed May 03, 2006 3:11 pm Post subject: alternator pulley and flywheel misalignment |
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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
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Posted: Wed May 03, 2006 4:52 pm Post subject: alternator pulley and flywheel misalignment |
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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
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Posted: Wed May 03, 2006 5:07 pm Post subject: Alternator pulley and flywheel misalignment |
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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
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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
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Posted: Wed May 03, 2006 6:00 pm Post subject: Alternator pulley and flywheel misalignment |
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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?
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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
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Posted: Wed May 03, 2006 7:16 pm Post subject: Alternator pulley and flywheel misalignment |
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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
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Posted: Wed May 03, 2006 8:37 pm Post subject: Alternator pulley and flywheel misalignment |
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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
>
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