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post #11 of 12 Old 03-23-2012
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Re: diesel stop solenoid

All the fuel solenoids I've been intimate with only need power to open and stay open. Lose the power ,shuts off, minimal draw anyway.
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post #12 of 12 Old 03-24-2012
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Re: diesel stop solenoid

I have seen solenoids that go both ways. The old detroit 2 strokes were normally open and energize shut in marine applications. The advantage of this is that a solenoid failure is not going to shut down the engine. I have never seen a normally open one in an OTR diesel, I wonder whether it isn't a regulation thing.

Also, some will have 1 set of coils and others will have 2. When there are 2, one set is used to activate the solenoid and the other set will hold it in the activated position while drawing much less power. For example, the dodge trucks with the Cummins from 94-98 were all this way.
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