| Onan board pinnout question bypassing regulator for start batt [message #281656] |
Tue, 07 July 2015 13:05  |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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My Onan is out on the crane and I am cleaning up the POs rats nest and bad board repair. Ran great but was bubble gum and crimps. A lot of the board mounted terminals were gone and replaced with male insulated flag crimps on tails which I have cleaned up/replaced. I thought I marked everything but cut out so much spaghetti I am down to what was the 3 wires that used to go to the now disconnected regulator. I know you disconnect the single wire and tape it up (where did this wire go as it will be eliminated ?) and the other two stay joined at the Y and taped up. These are the 2 wire numbers I need. I think they are 5 and 8. Do they get connected or left open? I'm looking at the Ken H 9/7/2001 drawing but confused on that part. Doesn't the alt signal need to get the "engine running" voltage to the board
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Onan board pinnout question bypassing regulator for start batt [message #281661 is a reply to message #281656] |
Tue, 07 July 2015 13:27  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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John,
There is one error (that I recently learned about from mr.erf)) on my Onan
diagram: The (5) connection shown for the flywheel alternator should be to
(11). Functionally, the two are the same unless the fuse blows, but I
should have drawn it correctly. Since I no longer know what program I used
to create the diagram, changing it is not straight forward.
As for the voltage regulator, Duane Simmons' circuit drawings show the
regulator powered from pin (8) -- the other end of the flywheel alternator,
so that's the wire you don't need if disconnecting the regulator -- as I
did for my diagram.
HTH,
Ken H.
On Tue, Jul 7, 2015 at 2:05 PM, John R. Lebetski
wrote:
> My Onan is out on the crane and I am cleaning up the POs rats nest and bad
> board repair. Ran great but was bubble gum and crimps. A lot of the board
> mounted terminals were gone and replaced with male insulated flag crimps
> on tails which I have cleaned up/replaced. I thought I marked everything but
> cut out so much spaghetti I am down to what was the 3 wires that used to
> go to the now disconnected regulator. I know you disconnect the single wire
> and tape it up (where did this wire go as it will be eliminated ?) and the
> other two stay joined at the Y and taped up. These are the 2 wire numbers I
> need. I think they are 5 and 8. Do they get connected or left open? I'm
> looking at the Ken H 9/7/2001 drawing but confused on that part. Doesn't the
> alt signal need to get the "engine running" voltage to the board
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
> Source America First
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Onan board pinnout question bypassing regulator for start batt [message #281663 is a reply to message #281662] |
Tue, 07 July 2015 14:10 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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John,
According to the Onan diagram on page 30 of the manual, the regulator
connected to 5, 8, and ground. (Which probably explains how I managed to
mess up the 5/11 connection on my diagram.) It's not certain, but probably
the 2 wires connected to 8, since there would be the wire from the
regulator and to the flywheel alternator (the diagram shows two connections
at 8 and only one at 5).
Ken H.
On Tue, Jul 7, 2015 at 2:45 PM, John R. Lebetski
wrote:
> Might be easier for me to understand this way. What was the stock setup?
> One wire (what number) went to one terminal on the regulator, and 2 wires
> (what numbers) went to the 2fer on the other terminal on the regulator.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
> Source America First
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Onan board pinnout question bypassing regulator for start batt [message #281664 is a reply to message #281663] |
Tue, 07 July 2015 14:44 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Ken, the Onan flywheel Alternator has a Wye (y) wound stator. The double
wire is opposite ends of the same wire, the lone duck is the mid point of
the stator winding. When you rotate permanent magnets past the iron core of
the stator, current flows in one direction when they approach, and the
other direction when they recede (AC) the diodes in the regulator only
allow current to pass one way, so, there is a diode at each end of the
coil. Both output leads of the diodes are connected together or rectified
into DC. The faster you move the magnets, the greater the voltage and
current. So, the regulator allows 20 - 30 volts DC to go to the circuit
board, and the excess voltage is converted to heat and leaves via those
fins on the regulator. Not too efficient, but cheap and durable. Just like
the rest of the Onan.
Jim Hupy
On Jul 7, 2015 12:11 PM, "Ken Henderson" wrote:
> John,
>
> According to the Onan diagram on page 30 of the manual, the regulator
> connected to 5, 8, and ground. (Which probably explains how I managed to
> mess up the 5/11 connection on my diagram.) It's not certain, but probably
> the 2 wires connected to 8, since there would be the wire from the
> regulator and to the flywheel alternator (the diagram shows two connections
> at 8 and only one at 5).
>
> Ken H.
>
>
> On Tue, Jul 7, 2015 at 2:45 PM, John R. Lebetski
> wrote:
>
>> Might be easier for me to understand this way. What was the stock setup?
>> One wire (what number) went to one terminal on the regulator, and 2 wires
>> (what numbers) went to the 2fer on the other terminal on the regulator.
>> --
>> John Lebetski
>> Woodstock, IL
>> 77 Eleganza II
>> Source America First
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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