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John Deere Tractors Discussion Forum
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Starter Test

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John (Wash.)

06-17-2006 07:47:34




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My neighbors gas 1020 turns over slow when starting. New battery and tuned up. The starter is suspect. Is there a way to check the condition of it with a volt meter as it turns over? Thanks, John




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Lee B

06-17-2006 22:59:32




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 Re: Starter Test in reply to John (Wash.), 06-17-2006 07:47:34  
A voltage reading from ground to the starter connection bolt WOULD be of interest here. They do make slide on ammeters and again a reading from one would be nice to know. 6 guage seems awfully small and could easily be the whole problem. If so, that cable should be getting warm while cranking as would any bad connection point, check for heat build up. Be sure to give the ground connections proper attention too.

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Glen in TX

06-17-2006 14:23:35




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 Re: Starter Test in reply to John (Wash.), 06-17-2006 07:47:34  
New cable ends and cables of a larger size with fine strand wire is always a good idea. If you see green corrosion crud up in cable replace it. That stuff can travel the entire length over time and cut down the current flow. Most starter testers have a inductive pickup to read volts and amps pulled by the starter through the battery cable. Early testers have shunt between the battery terminal and cable fastened to tester. You can hook your voltmeter to the battery and see how much the starter pulls it down. Should still have 12V when it free runs and no less than 4-6V when starter drive is locked in. If you don't get as least those readings pull it off for repair.

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johns48b

06-17-2006 11:14:13




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 Re: Starter Test in reply to John (Wash.), 06-17-2006 07:47:34  
i have good luck by making up battery leads out of wire used to make welder leads. seems like they don't corode over like other leads do. take it to a alternator/starter repair shop and have them test it.



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Randy G.

06-17-2006 09:15:48




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 Re: Starter Test in reply to John (Wash.), 06-17-2006 07:47:34  
When a armeture has a short the starter will spin very slowly. Best way to check it with a Growler and a hacksaw blade. I have one and its very helpful. Sadly, Growlers are no longer made but show up on Ebay once in a while. Thats where I got mine for $40 and it works!!



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Glen in TX

06-17-2006 14:04:03




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 Re: Starter Test in reply to Randy G., 06-17-2006 09:15:48  
Actually, new growlers are still made. They may not sell many because you can usually get them cheap at automotive shop auctions since no one knows what they are for now days. Just be careful with the 110V test leads on some growlers!



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B-maniac

06-17-2006 08:12:52




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 Re: Starter Test in reply to John (Wash.), 06-17-2006 07:47:34  
I'm sure a person with more expertise than myself will answer your question better than this but until they do; Most use a meter that measures the AMPs that the starter is actually drawing to turn the engine. I don't believe you can do this with a volt meter or an amp guage. They just tell you the amount on a wire or terminal.Sounds like the starter is partially shorted out in a winding or a winding broken or check the cables from the bat to make sure ALL the wires inside the insulation are intact and not broken OR corroded.

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John (Wash.)

06-17-2006 07:57:14




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 Re: Starter Test in reply to John (Wash.), 06-17-2006 07:47:34  
Also the hot lead off the battery is 6awg. He is the original owner of this tractor and says this is the factory lead. 6awg strikes me as a little light. Is this correct? Thanks, John



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