Wiring question
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=7357
Printed Date: 17 Jan 2025 at 2:48pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Wiring question
Posted By: NatureBoy
Subject: Wiring question
Date Posted: 29 Jan 2010 at 4:07pm
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I was cranking my ca, when i saw a spark come from the top of the starter. after that, it will not make contact. I replaced the contact on the starter, which didnt help, then i replaced the on/off switch which didn't help either. when i pull the on/off switch, the ammeter does not budge (doesnt show discharge). Any ideas as to what the problem could be or how i can fix it? It has a distributor and generator if this helps. It is also on a 12volt setup.
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Replies:
Posted By: firebrick43
Date Posted: 29 Jan 2010 at 4:15pm
| Starter windings shorted and burned out? Test for voltage with volt meter. The ammeter can be fried as well causing an open circuit. Check wiring for burnt wiring using volt meter. |
Posted By: Don(MO)
Date Posted: 29 Jan 2010 at 6:51pm
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You might try cleaning the ground on the starter, Pull the starter out and clean the head of the starter where it go's in the bellhousing.
Don ------------- 3 WD45's with power steering,G,D15 fork lift,D19, W-Speed Patrol, "A" Gleaner with a 330 corn head,"66" combine,roto-baler, and lots of Snap Coupler implements to make them work for their keep. |
Posted By: Gerald J.
Date Posted: 29 Jan 2010 at 8:03pm
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Clean ALL the connections, power and ground. Gerald J. |
Posted By: realolman
Date Posted: 30 Jan 2010 at 7:23am
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I don't know the specifics of the CA , but I would like to offer some general help... Batteries can and will explode from sparks, throwing acid all over the place so wear goggles and keep away from it as much as possible. Disconnect the battery terminal that IS connected to the tractor frame (grounded) and move it away from the battery. Disconnect the wire that is NOT grounded next . On the starter, disconnect the heavy wire right at the starter Connect a set of jumper cables from a known good battery to the starter in this order: positive at starter where you disconnected the wire positive at battery negative at battery negative at starter housing as far away from the battery as possible that should cause sparks where you touch the negative to the frame, but it should also cause the starter to try to crank. If it does try to crank the starter is OK . If it does not make sure you have a clean connection no paint or anything at the starter . If you are satisfied that the connection is good, the starter is bad. If the starter does not try to crank , since you saw sparks, check the connection at the starter inside and out. I ain't kidding about the battery exploding. I saw it when I was a kid at the county fair parking lot. It ain't a pretty sight. be careful. |
Posted By: B26240
Date Posted: 30 Jan 2010 at 7:32am
| I agree with realoman, best written advice i have seen on this for some time. I would add put your foot on the starter to hold it when you contact it with jumper cable, as a good starter should have tourque enough to roll across the floor if it is good. HTH Mark L |
Posted By: Steve in NJ
Date Posted: 30 Jan 2010 at 8:09am
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Pull the Starter motor out and clean off the two grounding bands. Then clean out the starter cavity where the bands make their ground. You lost the ground to the starter. Won't hurt to clean your connections either. Ice, snow, and moisture play havoc more in the winter than summer whether the tractor is in or out......HTH Steve@B&B |
Posted By: Don(MO)
Date Posted: 30 Jan 2010 at 8:29am
Thanks Steve,
That's what I was trying to say. lol
I see this all the time on the old AC tractors.
Don ------------- 3 WD45's with power steering,G,D15 fork lift,D19, W-Speed Patrol, "A" Gleaner with a 330 corn head,"66" combine,roto-baler, and lots of Snap Coupler implements to make them work for their keep. |
Steve in NJ wrote: