Generator shutdown solenoid tracking

[bloomas]

----- Original Message -----
From: Ryan Wright
To: wanderlodge@yahoogroups.com ; WanderlodgeForum@yahoogroups.com
Sent: Sunday, August 05, 2007 2:00 AM
Subject: [WanderlodgeForum] Re: Generator shutdown solenoid tracking
Ryan Glad you found the problem.
Bob Loomas 1985 PT 36


Folks,

Thanks for all of the help on the generator. I believe I have found
the problem. There's a little white box with a couple of terminals, I
believe these are the brushes. One of the wires leading to a brush was
simply hanging, looks like it became desoldered. I'm going to call my
Kohler supplier Monday and order a new one. I'm betting that fixes the
problem.

So now I have a spare voltage regulator! I'll just keep it on board
as I'm sure mine will fail some day. Anyway, I'm learning a lot about
this generator. I sat there and stared at the back of the unit for
what seemed like 10-15 minutes trying to find these "brushes and slip
rings" and could not see it. Didn't realize the rings were so large
nor the brushes so small. I think the saying "You learn something new
every day" is true.

-Ryan
'86 PT-40 8V92
Tri-Cities, WA

On 7/31/07, randydupree wrote:
> Ryan.
> simply unhook the oil sending units for a test.
> if it works fine replace the senders.
> Randy
> ----- Original Message -----
> From: Ryan Wright
> To: wanderlodge@yahoogroups.com ; WanderlodgeForum@yahoogroups.com
> Sent: Monday, July 30, 2007 11:58 PM
> Subject: Re: [wanderlodge] Re: Generator shutdown solenoid tracking
>
>
> Thanks to all for the excellent advice on my genset. I'm still SOL
> here, unfortunately, however I think I'm on to something and I wanted
> some advice:
>
> Per the control system schematic, it appears the overtemp sensor and
> the low oil pressure sensor will short to ground if there is a
> problem, triggering shutdown. Indeed, I suspect this may be happening,
> as my oil pressure gauge reads between 90-120psi. I tested the temp
> sensor and there is no path to ground from it's contacts. However,
> both of the oil pressure sensors (at least I think both of those
> things I found on the engine are oil pressure sensors - I suspect one
> goes to the gauge and the other goes to the control unit?) are shorted
> to ground. Not the wiring leading from the sensors, but the sensor
> terminals themselves.
>
> Does this indicate a faulty oil pressure sensor? Should I replace
> them? Is it possible they both went bad?! Unfortunately, nobody around
> here wants to look at my generator and I'm not in a position to take
> the coach across the state to have the nearest Kohler service center
> check it out. Especially not in 100 degree heat, with no generator. So
> I'm mostly guessing here and going on what little knowledge I can
> gather.
>
> Bob Loomas suggested I check the slip rings and brushes - I've not
> done that yet. I have replaced the voltage regulator, didn't help.
> Fuel cutoff solenoid wiring appears to be fine and intact, it opens
> like it should upon start, just releases immediately afterwards. All
> fuses appear intact. I'm not getting any power out of the generator,
> though I can keep the engine running by holding the cutoff solenoid
> open, I still get zero power output. I don't know if the control
> circuitry cuts power output when it triggers the solenoid or not.
>
> -Ryan
> '86 PT-40 8V92
> Tri-Cities, WA
>
>
>
>
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