Topica Loopframe_Guzzi Archive
 

Subject: RE: Gen. Woes/ Flash the Field

Author: Zerhackermann .

Date: Jun 4, 2001, 4:35 PM

Post ID: 1706988459

Here's the skinny I got when I was resurrecting my dormant Ambo.

take the cover off the voltage regulator.
clean all the contacts (like points) with 400 grit sand paper.
hose some wd 40 in the generator and voltage reg. Fire up the bike and whack
on the back of the generator with a mallet.clean out the wd 40 (paper towel
on a finer in the gen while it runs) actuate all the points on the regulator
one at a time manually. Dont touch the other coild while you do it.

By the time I had worked over to the B+ set, the charging system started
working.

take the usual precaustions as this involves chemicals, moving parts and so
on.



 From: Keith Ruff <klru-@webspan.net>
Reply-To: Loopfram-@topica.com
To: Loopfram-@topica.com
Subject: RE: Gen. Woes/ Flash the Field
Date: Mon, 4-Jun-2001 23:29:04 GMT

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Just tried to flash the field and it didn't do squat for me. Looks like
I've gotta go deeper. Thanx to Joe and Greg for the info and
explanations, I really had my hopes up that it would work, but as usual,
"Patience" (the name of my 71 Ambo) doesn't like to take the easy way
out! She prefers the long drawn out and expensive types of fixes!

Keith Ruff
71 Police Amabassador - NJ


Charles Mullendore wrote:
 Hi All,
I've done the same procedure for the same problem on a Montgomery Wards
(Benelli) 350 I had years ago. The bike had sat unused for approx. 15
years and
only had 1400 miles on it. Charged just fine afterwards! Cheers,

Charlie
3 Ambos (the old '69 is raring to go to WNY)

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Thanks for the explanation. Makes sense.
Chris in NC

 From: joe jump <jum-@hotmail.com>
Reply-To: Loopfram-@topica.com
To: Loopfram-@topica.com
Subject: RE:Gen. Woes/ Flash the Field
Date: Mon, 04 Jun 2001 16:49:22

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The question was asked about flashing the field on a generator.

This is done to rejuvenate a residual magnetism in the field coils.
This
 
 
 residual magnetism is required to "get the snowball rollin' down the
hill".
This magnetism starts the generator making current, which after a
point
 
 
 will
be high enough to close a set of points in the regulator that
supplies
 
 
 battery current to the field coils, which in turn increases the
magnetic
 
 
 field, causing more current to be generated in the rotating armature.
Without the residual magnetism, the cycle doesn't get started and
results
in
no output. The residual stays in place unless something disrupts it,
like a
sharp blow (drop), or perhaps disassembly-changing the field
windings,
 
 
 or
long periods of non-use. Generally it hangs in there.
Flashing the field re-establishes the residual magnetism, just
like
 
 
 magnetizing a screwdriver or a nail. You flash by crossing the BAT
terminal
on the regulator to the DF (field?) terminal just momentairily with a
jumper
wire.


 
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