Topica Loopframe_Guzzi Archive


Subject: Re: Generator Woes/Alternator conversion? (Long)

Author: Allan

Date: Jan 15, 2002, 10:32 PM

Post ID: 1709397577


HI,
I purchased a GEO alternator to mount on the Eldo. However I don't have any
electrical info to go with it. If any could tell me if it requires an
external regulator and a wiring diagram it would help me get this bike back
on the road. Its been about a month since I've done any riding and am
getting desperate.
----- Original Message -----
From: "Gary Cheek" <kg8-@home.com>
To: <Loopfram-@topica.com>
Sent: Friday, December 21, 2001 4:21 PM
Subject: RE: Generator Woes/Alternator conversion? (Long)



 
Yes as far as the alternator conversion. I picked up a GEO alternator
right after I bought the ELDO and Ambo. The mount on the Eldo was hacked
by the PO. I was able to Helicoil the holes ,flatten out the mount boss
and fit an oversize (.375") locating dowel to the generator.The locating
dowel I blieve is the little cause of the whole big problem with the
mount breakdown. Use studs ,not bolts for mounting. I also use a 3/16
thick HARDENED plate between the mount and the nuts to better spread the
clamping force of the studs. Use coarse threads in the soft aluminum and
fine threads into the nuts.
I will be doing the alternator bracket work up this winter and will
keep all posted.
"Relays for the horns and lights along with the circuit breakers
were mounted inside the right-side toolbox."

There is room inside the headlight to do this without giving up the
tool box or putting any non standard holes in it. If you do use relays
try not to over do it. The headlight is one place where they are
worthwhile and of course the horn and starter.Other than those spots for
the most part they are just another part that can fail.
Parts that aren't there don't break !
Allan wrote:
 Thanks for the info. I think I will call in a marker from a machinist
friend and see if we can fabricate a bracket that will hang from the
frame yet leave the gen in the stock position. If anything you have
givin me some ideas to work with. The quick and dirty flip the bracket
over would certainly get me on the road tomorow, it is tempting but
something nice looking would be better. I don't mind if the bike is
stock but it cannot look bad or thrown together if I can help it. The
alternator idea is good as they are usually lighter
and would not tend to tear their brackets off from vibration. I sure
miss my old Amb.

Allan

72 Eld with 1066cc kit which is why the block is staying however the gen
is mounted.
----- Original Message -----
From: Charlie Mullendore
To: Loopfram-@topica.com
Sent: Thursday, December 20, 2001 6:28 PM
Subject: Re: Generator Woes/Alternator conversion? (Long)

 Hi Allan,
There is the possibility of mounting an alternator instead of the
generator. There was a "950" Eldo at the WNY Rally that had been
converted to an alternator using one from a Geo Metro. The owner, Dale
Peterson, fabricated an aluminum plate that bolted to the front of the
timing cover (just behind where the generator belt runs) and used the
top two timing cover bolts to hold it in place. The Geo alternator had
its mounting "ears" cut off and the bracket was bolted to the front of
it (I think he used the alternator "through bolts" somehow). There was
a
 
 small "L" shaped bracket at the back of the alternator to help support
it also. The Geo pulley was left on the alternator and the crank
pulley
 
 was stock Eldo. The generator belt cover was unaltered. The whole
conversion was so nicely done that he had to take the generator belt
cover off for us to see how it was mounted. I believe Gary Cheek is
working a conversion using the same alternator - maybe he could help?

While I'm on the subject of Dale's bike, I'd like to share a few other
things he did that I found interesting. He used studs with s.s. acorn
nuts a number of places on the bike where frequent disassembly might
destroy the threads eventually using bolts. For instance, on the
carbs.
 
 where the fuel inlet "banjo" attaches and on the gen. belt cover. He
also used studs to attach the timing cover and the oil sump. He
drilled
 
 small holes (approx. 1/16") in the top of the carbs above the slides.
He
 
 would measure the height with a piece if wire he carried in his
toolkit
 
 and when he was done there were small pegs to plug the holes. Relays
for
 
 the horns and lights along with the circuit breakers were mounted
inside
 
 the right-side toolbox. There's probably a few more details I've
forgotten to mention. I've got pictures of this very nice
red/white/green creation and will post them as soon as I get time.
Cheers,

Charlie

----- Original Message -----
From: Allan
To: Loopfram-@topica.com
Sent: Thursday, December 20, 2001 2:42 AM
Subject: Re: Generator Woes

 Hi
I did the shim for the front of the generator already. The
mounting pads
 
 with the two bolt holes had been machined away and the space
filled with
 
 aluminum barstock which was welded into position, the
barstock has come
 
 loose frome the welds. there is nothing holding the gen.
bracket to the
 
 engine anymore. I don't see a way to repair this that will
last. that
 
 was why I was looking for an alternative for mounting the
generator.
 
 ----- Original Message -----
From: Patrick Hayes
To: Loopfram-@topica.com
Sent: Wednesday, December 19, 2001 7:20 PM
Subject: Re: Generator Woes



In a message dated 12/19/2001 2:41:54 PM Pacific Standard Time,
mut-@msn.com writes:



I just can't
face having the engine down again to reweld this with the chance
of
 
 distorting the lifter bores.


So don't. I ran my 73 Eldorado for over 100,000 miles with a worn
down
 
 generator support yoke casting. Without the support at the front
end of
 
 the generator, vibration will quickly tear the generator bracket
to
 
 pieces.

Just mount the generator gently and measure or otherwise determine
the
 
 amount of slop between the generator and the casting. Now get a
comparable piece of brass of the same or slightly larger thickness
and
 
 cut a shim to fit in there. Some snipping and tapping will get it
to
 
 fit into its curve. If done well, you can have tabs to bend over
and
 
 hold it in place. The shim will securely take up the loose space
and
 
 work for maybe 50,000 miles. What more do you want? Let me know
if you
 
 want a picture and I'll try to draw one.

The big issue is on reinstalling the generator and belt. If you
make
 
 the belt too tight, it will crush the brass shim quickly, allowing
the
 
 generator to rock and again break the mounting bracket or one of
its
 
 mounting bolts. If you make the belt too loose, it will flop and
vibrate and set up some motions which might accelerate crushing of
the
 
 shim. The loopframe belt should be just tight enough to not flop
around
 
 and certainly NOT taut. It should be nothing like a power
steering or
 
 air conditioner belt. Just snug.


Patrick Hayes
Fremont CA
EV, EV, SPII, V-65-C, Monza, SuperAlce
MGNOC L-403
http://community.webshots.com/album/24267127XGTxWVBjCs
1972 Eldo Police Model
1974 Eldo Civvy Amal

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