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Ammeter, Plus or Minus Charging

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Wagon19
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Zip Code: 24352
Tractors Owned: 1950 Cub "Jersey"
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1952 Cub "Jenny"
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Location: VA, Laurel Fork

Ammeter, Plus or Minus Charging

Postby Wagon19 » Fri Mar 08, 2013 5:37 pm

Guys, I have two Cubs. One a 1950 with a Magneto ignition (Jenny), one with a distributor (Jersey), a 1952 model. Jenny is in working order with a new clutch and she runs great, but the Ammeter is reading on the minus side. I bought her a year ago.. What do I need to look for to get her in the charging mode. Where do I need to place my volt meter leads to see if the generator is working.
Thanks for your help in advance.

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Wakulla Bill
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Re: Ammeter, Plus or Minus Charging

Postby Wakulla Bill » Fri Mar 08, 2013 6:04 pm

Welcome to the forum. You can check voltage output at the battery terminals. The link below will also help in troubleshooting
http://www.cleancomputes.com/Cub/Mainte ... 0Chart.jpg
"Work smarter; Not harder"

Wagon19
10+ Years
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Posts: 30
Joined: Sat Jul 14, 2012 6:46 pm
Zip Code: 24352
Tractors Owned: 1950 Cub "Jersey"
Ferguson TO 20
1952 Cub "Jenny"
1951 Cub. "Wilkes"
2014 Kubota L3200 HST
Circle of Safety: Y
Location: VA, Laurel Fork

Re: Ammeter, Plus or Minus Charging

Postby Wagon19 » Fri Mar 08, 2013 7:01 pm

Thanks Bill, Will follow the chart and test. Thanks for the help. Will respond with the result
Wagon

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Rudi
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Re: Ammeter, Plus or Minus Charging

Postby Rudi » Fri Mar 08, 2013 8:28 pm

Wagon19 wrote:Jenny is in working order with a new clutch and she runs great, but the Ammeter is reading on the minus side.


Is this Cub positive ground or negative ground? That does make a difference. The Cubs are positive ground originally, so if someone changed the ground then the ammeter is wired backwards and will show a negative even though it is charging. If your Cub is still positive ground, you may need to polarize the generator. How To Polarize Your Generator.
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship


Wagon19
10+ Years
10+ Years
Posts: 30
Joined: Sat Jul 14, 2012 6:46 pm
Zip Code: 24352
Tractors Owned: 1950 Cub "Jersey"
Ferguson TO 20
1952 Cub "Jenny"
1951 Cub. "Wilkes"
2014 Kubota L3200 HST
Circle of Safety: Y
Location: VA, Laurel Fork

Re: Ammeter, Plus or Minus Charging

Postby Wagon19 » Sat Mar 09, 2013 7:59 pm

Rudi, thanks. I did change the battery cables, and the ammeter started reading on the positive side at about 12 amps.
I had no idea someone had changed it over to a negative ground. The started drags, but will start once she turns over twice. It has a new battery with a full charge. Does it sound like starter problem, or a wiring or connection problem

danovercash
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Re: Ammeter, Plus or Minus Charging

Postby danovercash » Sat Mar 09, 2013 10:20 pm

Check connections for cleanliness. Use a volt ohm meter to check continuity and resistance. Use heavy jumper cable to jump from battery terminal to starter terminal. If it starts better it's the wire, if not it's the starter.
"I'd rather be a mechanic in the shop"- Henry Ford

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Gary Dotson
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Re: Ammeter, Plus or Minus Charging

Postby Gary Dotson » Sun Mar 10, 2013 7:07 am

Check voltage across the battery, while attempting to start, then check it at the starter under the same condition. If there is a big difference, it's a cable problem, if not, it's a starter problem. It could be the switch on the starter.

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Rudi
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Re: Ammeter, Plus or Minus Charging

Postby Rudi » Sun Mar 10, 2013 2:03 pm

I agree with Gary and Dan. I don't think it is so much the starter as the connections. Start at the battery and ensure the terminals are clean and bright as well as the cable terminal ends. Check for cracks in the insulation and any corrosion. Most likely though will be the saddle switch.... don't ask why I am leaning toward the switch. They can corrode easily especially if it is one of the cheaper after market ones. Remove the saddle switch and clean it up good so everything is bright and clean. You should notice a lot better movement when you pull the starter rod.

Keep us posted.
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship


Wagon19
10+ Years
10+ Years
Posts: 30
Joined: Sat Jul 14, 2012 6:46 pm
Zip Code: 24352
Tractors Owned: 1950 Cub "Jersey"
Ferguson TO 20
1952 Cub "Jenny"
1951 Cub. "Wilkes"
2014 Kubota L3200 HST
Circle of Safety: Y
Location: VA, Laurel Fork

Re: Ammeter, Plus or Minus Charging

Postby Wagon19 » Sun Mar 10, 2013 6:29 pm

Guys, just put new ends on an old battery cable and fastened one end onto the starter post and a new end on the battery post. Jenny started much better. Next I will will check the saddle switch and clean it up. I remember a couple of years ago, that was the main problem with the Ferguson TO 20.
I appreciate all of your help and suggestions.

danovercash
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Joined: Mon Feb 17, 2003 8:48 pm
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Re: Ammeter, Plus or Minus Charging

Postby danovercash » Sun Mar 10, 2013 6:40 pm

Remember that the new ends are a temp fix. They love to harbour corrosion. Use tinned wire with crimped ends, not the ones that bolt on. Otherwise go for a new cable. Just my opinion.
"I'd rather be a mechanic in the shop"- Henry Ford

252646 & 221525. 195897 (Gone, but not forgotten)

User avatar
Rudi
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Posts: 28706
Joined: Sun Feb 02, 2003 8:37 pm
Zip Code: E1A7J3
Skype Name: R.H. "Rudi" Saueracker, SSM
Tractors Owned: 1947 Cub "Granny"
1948 Cub "Ellie-Mae"
1968 Cub Lo-Boy
Dad's Putt-Putt
IH 129 CC
McCormick 100 Manure Spreader
McCormick 100-H Manure Spreader
Post Hole Digger
M-H #1 Potato Digger
Circle of Safety: Y
Twitter ID: Rudi Saueracker, SSM
Location: NB Dieppe, Canada
Contact:

Re: Ammeter, Plus or Minus Charging

Postby Rudi » Sun Mar 10, 2013 8:50 pm

Wagon:

Check this out : How To Build A Replacement Battery Cable. It pays for itself in a very short time :!:
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship


Wagon19
10+ Years
10+ Years
Posts: 30
Joined: Sat Jul 14, 2012 6:46 pm
Zip Code: 24352
Tractors Owned: 1950 Cub "Jersey"
Ferguson TO 20
1952 Cub "Jenny"
1951 Cub. "Wilkes"
2014 Kubota L3200 HST
Circle of Safety: Y
Location: VA, Laurel Fork

Re: Ammeter, Plus or Minus Charging

Postby Wagon19 » Mon Mar 11, 2013 9:09 am

I read the link. Beats the heck out of paying $98.00 for a new cable. It will take a few days for me to get to this, maybe next weekend. Will let you know how it all turns out
Wagon


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