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NatureBoy 
Bronze Level
Joined: 01 Oct 2009
Location: Soddy Daisy, TN
Points: 5
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 Topic: Wiring question
Posted: 29 Jan 2010 at 4:07pm |
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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firebrick43
Orange Level
Joined: 10 Dec 2009
Location: Warren County
Points: 592
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Posted: 29 Jan 2010 at 4:15pm |
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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.
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Don(MO)
Orange Level
Joined: 12 Sep 2009
Location: Bates City MO.
Points: 6862
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Posted: 29 Jan 2010 at 6:51pm |
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
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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.
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Gerald J.
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Joined: 12 Sep 2009
Location: Hamilton Co, IA
Points: 5636
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Posted: 29 Jan 2010 at 8:03pm |
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Clean ALL the connections, power and ground.
Gerald J.
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realolman
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Joined: 12 Sep 2009
Points: 384
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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.
Edited by realolman - 30 Jan 2010 at 7:33am
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B26240
Orange Level
Joined: 21 Nov 2009
Location: mn
Points: 3860
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Posted: 30 Jan 2010 at 7:32am |
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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
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Steve in NJ
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Joined: 12 Sep 2009
Location: Andover, NJ
Points: 11884
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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
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Don(MO)
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Joined: 12 Sep 2009
Location: Bates City MO.
Points: 6862
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Posted: 30 Jan 2010 at 8:29am |
 Steve in NJ wrote:
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
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Thanks Steve,
That's what I was trying to say. lol
I see this all the time on the old AC tractors.
Don
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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.
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