[AJD] Installing Wico C Mag

[John Paur]

Perhaps the spring was weak and when it was rebuilt a stronger spring was
installed.  In any case position of the lugs should not have changed because
of rebuild.  To install, first fire the mag on the #1 (top) post. At that
point the lugs will be in a horizontal position.  Now turn the engine to the
top of compression stroke on #1 (flywheel side) cylinder.  Line up the marks
on the flywheel (L H inpulse) with the mark on the transmission case/bearing
cage.  If  your tractor is a late styled version with the enclosed flywheel,
then line up the punchmark on the flywheel hub with the mark on the bottom
of the flywheel cover opening.  At this point the magneto drive slots will
also be horizontal.  Install the magneto, making sure the lugs and slots
mesh.  Install the bolts finger tight and turn the mag as far foreward as
possible.  Now turn the engine over two revolutions, lining up those timing
marks exactly again.  Now go to the mag and slowly, carefully rotate the mag
towards the rear of the tractor.  When the mag (impulse) clicks, stop
exactly there. Tighten the mag bolts.  Your magneto is installed and
perfectly timed!!  Good luck.  John

----- Original Message -----
From: "LeRoy Price" <lep at epix.net>
To: "Antique John Deere mailinglist"
<antique-johndeere at lists.antique-tractor.com>
Sent: Sunday, May 29, 2005 5:55 PM
Subject: Re: Re: [AJD] Installing Wico C Mag


> John,
>
> So because its been rebuilt its harder to do?  I did it with my fingers
before.  I know when I took it off it was just about ready to fire.  I
assume I just need to get it back to that position let it fire and then turn
it backwards and then put it on.
>
> Correct?
>
> I'm wondering if the position has changed since its been rebuilt?
>
> LeRoy
>
>
> >
> > From: "John Paur" <johnjanpaur at directcon.net>
> > Date: 2005/05/29 Sun PM 08:14:43 EDT
> > To: "Antique John Deere mailing list"
> > <antique-johndeere at lists.antique-tractor.com>
> > Subject: Re: [AJD] Installing Wico C Mag
> >
> > LeRoy,  Keep turning it.  You will need a plier or some tool to grip the
lug
> > and just turn it until it snaps over.  That's the impulse, a spring
loaded
> > delay that holds the rotar and then lets it spin past the magnet to
produce
> > the spark.  At higher revolutions (after the engine starts), centrifugal
> > force bypasses the delay mechanism (impulse).  An oversimplistic
description
> > but gives a general idea of how it works.  John
> >
> > ----- Original Message -----
> > From: "LeRoy Price" <lep at epix.net>
> > To: "Antique John Deere mailinglist"
> > <antique-johndeere at lists.antique-tractor.com>
> > Sent: Sunday, May 29, 2005 9:17 AM
> > Subject: [AJD] Installing Wico C Mag
> >
> >
> > >
> > > I'm going to try and re-install a rebuilt mag on my earlier 1947 B
> > tomorrow but thought I'd ask a question first.
> > >
> > > I was looking at the mag today and turning it clockwise which is free,
> > normal I think.  Then turning it counterclockwise it catches a small
> > protruding piece of metal.  If I recall right it should go so far in
tension
> > and release.  But it doesn't seem to release.
> > >
> > > Soooo, I probably have it wrong.  So can anyone help?  Any install
tips?
> > >
> > > Also the top wire position on the mag does that normally go to the
> > flywheel side of the tractor?
> > >
> > > LeRoy
> > >
> > > _______________________________________________
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> > >
> > >
> >
> >
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