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Kohler S800 Electric Plant


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  #21  
Old 09-30-2018, 06:24:12 PM
ssv54tpp ssv54tpp is offline
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Default Re: Kohler S800 Electric Plant

Well I got the electric start to work, but it does not start on a draw more does it stop when a load is disconnected.
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  #22  
Old 09-30-2018, 10:14:08 PM
Frank DeWitt Frank DeWitt is offline
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Default Re: Kohler S800 Electric Plant

It will need a load of 40 what's or more for auto start.

Also, you must disconnect the wire that grounds the points on auto stop in order to crank start it. Perhaps someone did this.
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  #23  
Old 09-30-2018, 10:26:18 PM
Vanman Vanman is offline
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Default Re: Kohler S800 Electric Plant

Is the magneto shut down lead still disconnected from terminal #5 on the controller? That's what Frank mentioned. If so it cannot fire unless the main relay (load sensing) is pulled in. Unless the contact is dirty. It was off earlier so he could hand crank start it.

When you apply a load, does the main relay pull in? Be sure the thermal over crank switch is not tripped. Button must be pushed in.

Likely contacts need to be cleaned.
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  #24  
Old 10-01-2018, 08:26:10 AM
ssv54tpp ssv54tpp is offline
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Default Re: Kohler S800 Electric Plant

No the number 5 connector is hooked up now.

So what is going on is , as soon as I hooked the batteries up it started cranking and started with no load. I can mlm plug a light in and it works great. I let it run for about an hour and it never shut off even when no load was detected.
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  #25  
Old 10-01-2018, 12:09:37 PM
Vanman Vanman is offline
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Default Re: Kohler S800 Electric Plant

Ah, ok. It could be that the Main Relay is stuck. Should be the large one on the left. The contacts are usually at the top, and the contact arm should be up when no load is connected. It only moves a little bit. Carefully see if you can get it to move up (or down, if this is not the problem). It *might* be stuck with residual magnetism too. Can you post a photo of the inside of your controller?

Keith

Last edited by Vanman; 10-01-2018 at 02:15:08 PM.
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  #26  
Old 10-01-2018, 02:21:38 PM
ssv54tpp ssv54tpp is offline
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Default Re: Kohler S800 Electric Plant

So the information that you sent me is very helpful, but it is not the same as mine. Very close though. Mines is a d 1700 s. Slightly different. As the one picture shows the previous owner had it set up for show and no auto start. Judging by the extra yellow wires. I removed them and now it auto starts when I put a load on it, except for the fact that it over revs and does not produce power at the outlet like it used to. And the choker does not work. So I have some detective work to do.
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  #27  
Old 10-01-2018, 04:29:35 PM
ssv54tpp ssv54tpp is offline
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Default Re: Kohler S800 Electric Plant

Maybe you could put up.a picture of the inside of yours?
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  #28  
Old 10-02-2018, 12:37:01 AM
Vanman Vanman is offline
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Default Re: Kohler S800 Electric Plant

This one is the earliest I have, 1934, IIRC. It is a D-1700 controller on a Model D plant.

Yours is going to have to be slightly different as your engine does not have a governor, but instead has a solenoid in series with the load which acts to add throttle in response to load, correct?

Nevertheless, if your engine is overspeeding and you are not getting power to the output terminals, this would seem to indicate to me that the generator relay (center one) is not pulling in and the cranking relay (right one) is not dropping out. I believe those two are electrically interlocked.

I don't know how your controller gets the signal that the engine is running. Mine uses a switch on the governor arm. I'm guessing that this is the core difference between the D-1700 and the D-1700-S controllers. That and possibly the current rating of the series coils (1-1/2 kW vs 800 watt plants).

I would check the generator relay shunt coil (center relay, bottom coil) for continuity.

As a quick test, try pushing the generator relay armature in with a stick after the set has been started automatically with a load. Do this before the set overspeeds, otherwise your bulbs may be burned out.

It is interesting that the controller should be bypassed "for show", when complete manual operation can be obtained simply by disconnecting the wire at terminal #5. And, to me, the fully automatic operation, with lights and switches set up remotely for demonstration, is far more impressive. Instead I hazzard a guess that the generator relay shunt coil failed, preventing complete controller operation, and so the yellow wire was installed to shunt power around the generator relay, and the mag wire disconnected from terminal #5 to allow for hand cranking.
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  #29  
Old 10-02-2018, 07:20:21 AM
ssv54tpp ssv54tpp is offline
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Default Re: Kohler S800 Electric Plant

Thanks for the picture, I will try to look at it tonight .
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  #30  
Old 10-02-2018, 07:17:42 PM
ssv54tpp ssv54tpp is offline
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Default Re: Kohler S800 Electric Plant

So the center bottom coil got hot instantly and I noticed the wire was loose/falling out see the pictures. I also noticed there are two wires connected to the #1 terminal and I only see one one the diagrahm.
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