G Electrical Problem
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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=36070
Printed Date: 31 May 2025 at 6:56am
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Topic: G Electrical Problem
Posted By: oldironguy
Subject: G Electrical Problem
Date Posted: 24 Aug 2011 at 6:22pm
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One of my Gs has a well charged battery and a new starter switch yet the starter will not turn over. I think I have everything wired correctly. Any suggestions? I'm frustrated. Does anyone know how to convert a G from6 to 12 volt without butchering the sheet metal to fit in an alaternator? Does anybody make electronic ignition for the G at 6 volts or 12 volts?
Thanks.
Dick
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Replies:
Posted By: MNLonnie
Date Posted: 24 Aug 2011 at 6:42pm
With 6 volt you need to have very good connections, I would check those first or leave the 6 volt hooked up for ignition and hook a 12 volt up to the starter to turn it over, they aren't nearly as picky about making good contact. at least you might find out if it's in the starter or the wiring?
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Waukesha B, B, IB, G, styled WF, D15, 615 backhoe, 2-Oliver OC3's, 4 Ford Model T's, 3 Model A Fords, AV8 Coupe, AV8 Roadster, 1933 Ford Wrecker
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Posted By: Tedin NE-OH
Date Posted: 24 Aug 2011 at 6:42pm
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Bad starter? Bad connections at battery.
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Posted By: Dusty MI
Date Posted: 24 Aug 2011 at 7:01pm
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Put a volt meter on the cable at the starter, see what it reads with the starter engaged.
Dusty
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917 H, '48 G, '65 D-10 series III "Allis Express"
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Posted By: JoeM(GA)
Date Posted: 24 Aug 2011 at 7:31pm
Big cables(not wimpy car cables) and good grounds are the first things to check, also be sure the starter is getting a good ground to the block. If everything is right there is no reason to convert to 12 volts
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Allis Express North Georgia
41 WC,48 UC Cane,7-G's,
Ford 345C TLB
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Posted By: Steve in NJ
Date Posted: 25 Aug 2011 at 10:14am
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The 6V system is a very simple system, BUT it needs a little attention once in a while to keep it in tip top shape. Cables were mentioned, but make sure all grounds are clean and connections are also clean. Very important! If the system has its grounds and connections are clean, I would pull the starter and have it tested and inspected. Don't forget about the Battery either. Doesn't matter if its new or not. Do a draw test on the Battery FIRST! If the power supply passes a draw test, then move on. May save you a lot of time. We offer the Pertronix electronic ignitions in 6VPG, 12VPG, & 12VNG. We also offer a wiring system kit for a 12V conversion for the G if interested. Double check your Battery, connections, & grounds first before you do a conversion. Could be a simple overlooked problem....
mailto:Steve@B&B - Steve@B&B
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Posted By: Tony.Or
Date Posted: 25 Aug 2011 at 10:21am
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I will throw in my help also, if all of the above fail and you do change to 12 V. and your starter is dead. I have brand new 12 V. starters, bolt right on. $295 + $10.95 frt.
Thanks Tony
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http://www.tonystractors.com" rel="nofollow - http://www.tonystractors.com
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Posted By: CTuckerNWIL
Date Posted: 25 Aug 2011 at 10:38am
After owning a G for a short time, I see no reason whatsoever to change to 12 volts. That engine will spin over fine with 6 volts if you don't have other problems. If the tractor has sat for a while, pull the starter and jump it with your 6 volts. Check for mouse nests in the flywheel housing. If you have good clean connections to your battery and the starter switch is good, you probably have bad brushes or worn bearings in the starter.
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http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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Posted By: oldironguy
Date Posted: 25 Aug 2011 at 7:29pm
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Thanks Guys.
I'll be back up at the farm next week and will follow up, especially on your suggestions. I'm encouraged by the consistency of your responses and by your encouragement.
Dick
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