Home » Public Forums » GMCnet » ONAN starting (starter stays engaged after starting)
| Re: [GMCnet] ONAN starting [message #320943 is a reply to message #320929] |
Sun, 23 July 2017 23:35   |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
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Senior Member |
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Ken,
I don't pretend to understand the two K coils shown either. But that's
Onan's doings, not mine! I just double checked and I copied that weirdness
directly -- all the way back to 2001.
The only way I can rationalize it is if neither coil can hold the solenoid
contacts closed alone. I'm guessing that the coil in series with the motor
creates just enough contact to activate the parallel coil, which then
firmly closes the contact. When K1 opens, the loss of the series current
allows the contacts to open again. Possibly some sort of arc suppression
scheme? Sort of like the little jumper wire from the + side of K1 to its
contact disc. Duane and I never could figure out any reason for that one
either, except maybe to make it a proprietary part.
I guess someone needs to disassemble and do some tests on an Onan starter,
huh?
Ken H.
On Sun, Jul 23, 2017 at 10:17 PM, Ken Burton wrote:
> I have been looking at Ken H's wiring diagram. Someone is going to have
> to explain to me how the starter solenoid / relay works as shown. I see 2
> coils labeled only as K It seems to me that the lower (right) coil would
> be energized by K1 and in turn would close the K contact to power the
> starter.
>
> What confuses me is the other K coil (wired vertically in the diagram).
> It appears to me when voltage to the K solenoid from k1 is dropped, then the
> to two solenoid K coils are now in series with +12 and power is being
> applied by the closed K N/O contact. If this is true, we would have some
> voltage other than +12 or 0 at the K1 N/0 contact that he is reading.
>
> What am I missing here?
>
> Do we have a diode missing in the diagram?
>
> Is the diagram wrong?
>
> Ken B.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
>
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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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