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Allis Chalmers Discussion Forum
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Solenoid

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Author 
Brushman

04-16-2006 13:23:48




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I bought a starter on E-bay-came with a solenoid attached. I would like to know what wire goes where. 3 terminals 1 to left-with bar attached to starter case, middle-small bolt, and right-slightly larger-opposite of bar/bolt. I'm starting from scratch since I'm converting to electric start from hand crank.




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John T

04-17-2006 08:46:03




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 Re: Solenoid in reply to Brushman, 04-16-2006 13:23:48  
Brushman, from your limited info and having no idea what starter or solenoid you have, I gotta offer some basic broad generic tips which may or not help????? ??

1) A solenoid ought to have like 2 big posts, one leads to the starter post/stud (often with a flat strap) while the other is where the big battery cable attaches. The big hot ungrounded battery cable CAN NOT attach to the same place where a strap etc connects to the starter, otherwise she would always be cranking.

2) A typical solenoid has one or two small lil wire terminals. One is the solenoid activation terminal (S) which wires to the starter switch such as a push to start or the spring start position on some key type switches. What it does is to activate and pull in the solenoid when the button etc is depressed and that sends battery voltage to that terminal. The other may?? be an I terminal which is hot with voltage ONLY when the solenoid is activated and they are used to by pass an ignition ballast resistor on some gas engines that uses a ballast resistor.

3) How to tell which lil terminal to wire the starter push button or the start spring position on a key type switch:::::::: With the big hot ungrounded battery cable attached to the solenoid as noted above and the battery hooked up and the starter mounted n grounded etc., jump a hot battery voltage wire (such as over from the big battery cable post) etc to one of the solenoids lil terminals by momentarily bumping against/scratching/touching to the solenoid terminal and if its the correct S terminal it will cause the solenoid to latch in and the engine to crank. If the wrong lil terminal (the I one) it wont do nuttin.

4) The start wire from the dash to the solenoids lil S activation terminal should be one down from a push to start or key switch which becomes hot when depressed or in the spring start position.

Clear as mud????/

No warranty express or implied

John T in Indiana

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IBorange in TX

04-16-2006 18:58:06




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 Re: Solenoid in reply to Brushman, 04-16-2006 13:23:48  
I agree with Old. That 3rd terminal is for the glowplugs if you use it on a diesel. The glow plugs will be on as long as you turn the starter over. If not for a diesel, do what Old said.



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old

04-16-2006 15:34:26




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 Re: Solenoid in reply to Brushman, 04-16-2006 13:23:48  
Just a guess since you didn't give much to go on. The larger one will go to the battery and the small one will go to the switch, or push button which ever you are useing



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