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AC D14 electrical short

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John Warren

05-24-2001 18:28:40




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Help,
We have a 1951 D14 that we used daily for farm chores. It has a new alternator and battery but it has a short somewhere and we have to disconnect the battery after each use. Any suggestions where to start looking?
Thanks

John Warren




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Dave Grubb

05-25-2001 12:10:21




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 Re: AC D14 electrical short in reply to John Warren, 05-24-2001 18:28:40  
John: there should be a diode in the wire going to the #1 terminal. This diode is an electric check valve that will permit current flow in one direction only. Diodes will fail by having an open circuit or short out to any convient ground. Find the diode and check it with a multimeter. Set the meter to R1 and place the leads across the diode: the meter should read an open circuit. Reverse the leads: the meter should read continuity. Place one lead on the case of the diode and one lead on either diode lead: it should read an open circuit for each lead to case. The archives section on this site has some good tips on this.

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Larry Ks.

05-25-2001 04:57:24




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 Re: AC D14 electrical short in reply to John Warren, 05-24-2001 18:28:40  
I'd like to ask you a question...I've got a D14 to, and can't figure out how the hydralics work. I've hooked a cyclinder up to the hookup on the back...my lever pushed to the up position, and the cylinder goes up just fine, but I can't get it to let the pressure off and the cylinder to return to the down position. Does the traction booster lever have anything to do with it? When I pull the lever to the down position, I can't feel anything--like there is no detent. My buddy has a D17 and his control has the same feeling as mine...Whats the deal?? Thanks if you can help me...and Thanks if you can't. I'm using a one way cyclinder and it works perfect on my IHC, so its not the cylinder.

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Gary

05-28-2001 19:44:12




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 Re: Re: AC D14 electrical short in reply to Larry Ks., 05-25-2001 04:57:24  
The traction booster lever can have an effect on the hydraulics not working and it should be in the down position. Does your lift arms go down? If they are sticking in the up position then you have an unloading valve sticking in the pump.



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steve

05-24-2001 18:49:49




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 Re: AC D14 electrical short in reply to John Warren, 05-24-2001 18:28:40  
I assume you used a Delco alternator (from general motors auto). If it has the internal regulator then there is a dual pigtail plug on the side in the back. This provides the exitation to make the regulator work and the feedback to make it regulate. The regulator wire must be disconnected when not running. Normally this is done by going thru the ignition switch on a car. If the wire is connected straight to the battery it will leak backward thru the alternator when not running. Try pulling the two prong lead and see if that stops your battery drain. If you need a wiring diagram that shows this just ask. If you have a different setup, just ask again.

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