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Farmall H Generator Charging Issue
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- Urbish
- 10+ Years
- Posts: 2428
- Joined: Sat Sep 07, 2013 3:45 pm
- Zip Code: 48158
- Tractors Owned: ~
1958 International Cub LoBoy
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B
2022 Massey Ferguson GC1723E Subcompact
Cub Loboy L-54 Leveling and Grader Blade - Circle of Safety: Y
- Location: Manchester, MI
Farmall H Generator Charging Issue
I suspected that my H was not charging, but the ammeter didn't show any movement (even if I turned the lights on and off). So I replaced the ammeter last night and confirmed that I am not charging at all. I went through the procedure of applying voltage to the generator to make it 'motor' (pretty slowly I might add) and observed it motoring slower when I grounded the F terminal. So that appears to check out. With the tractor running, I am getting voltage jumping all over the place as measured with a digital multimeter. It rapidly fluctuates as high as the high teens and jumps negative, and everywhere in between. Any thoughts as to what is going on?
Jim
- Stanton
- Cub Pro
- Posts: 7760
- Joined: Mon Jun 22, 2009 6:56 am
- Zip Code: 64070
- Tractors Owned: 1942 Farmall AV, serial #87025
1947 Farmall Circle Cub, serial #2116
1948 Farmall Cub, serial #46066 - Circle of Safety: Y
- Location: Lone Jack, MO
Re: Farmall H Generator Charging Issue
I do know that an analog type voltmeter is better suited to measuring these old tractors. Digitals want to jump around due to trying to read multiple times per second and getting varied hits.
I'm having trouble with my '45 H charging as well. Local electrical shop tests it out as being ok, but it won't charge the battery. Ammeter shows discharge when lights are "on", but nothing otherwise, so feel my ammeter is good. Am seriously considering converting to 12v with alternator...
I'm having trouble with my '45 H charging as well. Local electrical shop tests it out as being ok, but it won't charge the battery. Ammeter shows discharge when lights are "on", but nothing otherwise, so feel my ammeter is good. Am seriously considering converting to 12v with alternator...
- Slim140
- 5+ Years
- Posts: 4908
- Joined: Wed Nov 22, 2017 6:24 am
- Zip Code: 00000
- Tractors Owned: .
1970 International 140
1972 International 140
1949 John Deere A
1993 Ford 4630 W/Loader
1965 John Deere 110
1961 Cub Cadet Original - Circle of Safety: Y
Re: Farmall H Generator Charging Issue
Could it be the regulator in both y'all's cases? Aren't there some contacts in there that can get dirty kinda like points?
Every home is a school, what are you teaching?
- Urbish
- 10+ Years
- Posts: 2428
- Joined: Sat Sep 07, 2013 3:45 pm
- Zip Code: 48158
- Tractors Owned: ~
1958 International Cub LoBoy
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B
2022 Massey Ferguson GC1723E Subcompact
Cub Loboy L-54 Leveling and Grader Blade - Circle of Safety: Y
- Location: Manchester, MI
Re: Farmall H Generator Charging Issue
I will try an analog voltage meter.
My wiring is original (in poor condition) and may be causing some of my trouble. I suppose that's where I should start. I have a cutout on mine. The cutout is opening and closing in response to battery voltage drop. Maybe I'm just not passing enough current back to the battery due to the bad wiring.
My wiring is original (in poor condition) and may be causing some of my trouble. I suppose that's where I should start. I have a cutout on mine. The cutout is opening and closing in response to battery voltage drop. Maybe I'm just not passing enough current back to the battery due to the bad wiring.
Jim
-
- 5+ Years
- Posts: 104
- Joined: Mon Jul 11, 2016 11:13 pm
- Zip Code: 52625
- Tractors Owned: 1949 C, 1953 Super M, 1953 Super H, 1955 Cub LoBoy, 1967 Cub LoBoy, ?? 574
Re: Farmall H Generator Charging Issue
Tha ammeter also needs a good ground in order to function. There are at least 3 places in that ground path to checked & cleaned
1. Meter to the dash cover.
2. The cover to the box.
3. The box mount to the steering wheel support/mount
In other words any place that metal touches metal between the meter and the tractor itself
Mike
1. Meter to the dash cover.
2. The cover to the box.
3. The box mount to the steering wheel support/mount
In other words any place that metal touches metal between the meter and the tractor itself
Mike
- Urbish
- 10+ Years
- Posts: 2428
- Joined: Sat Sep 07, 2013 3:45 pm
- Zip Code: 48158
- Tractors Owned: ~
1958 International Cub LoBoy
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B
2022 Massey Ferguson GC1723E Subcompact
Cub Loboy L-54 Leveling and Grader Blade - Circle of Safety: Y
- Location: Manchester, MI
Re: Farmall H Generator Charging Issue
mikes5785 wrote:Tha ammeter also needs a good ground in order to function. There are at least 3 places in that ground path to checked & cleaned
1. Meter to the dash cover.
2. The cover to the box.
3. The box mount to the steering wheel support/mount
In other words any place that metal touches metal between the meter and the tractor itself
Mike
Thanks for reviving my once-dead topic. In my case it was the screws that hold the ammeter/light switch box together. The cover wasn't grounding well to the box. I added some star washers on the back side under the nuts and all was good, oh and a new ammeter.
Jim
-
- 10+ Years
- Posts: 2929
- Joined: Sun Apr 19, 2009 9:51 pm
- Zip Code: 63664
- Location: MO, Potosi
Re: Farmall H Generator Charging Issue
That doesn't sound right to me, unless it has a lighting circuit.mikes5785 wrote:Tha ammeter also needs a good ground in order to function. ...........
I know the cutout charging circuit that goes through the light switch needs a good ground, but have never heard of an ammeter needing a ground.
I think the new ammeter made all the difference.Urbish wrote:........ I added some star washers on the back side under the nuts and all was good, oh and a new ammeter.
-
- 5+ Years
- Posts: 104
- Joined: Mon Jul 11, 2016 11:13 pm
- Zip Code: 52625
- Tractors Owned: 1949 C, 1953 Super M, 1953 Super H, 1955 Cub LoBoy, 1967 Cub LoBoy, ?? 574
Re: Farmall H Generator Charging Issue
Scrivet wrote:That doesn't sound right to me, unless it has a lighting circuit.mikes5785 wrote:Tha ammeter also needs a good ground in order to function. ...........
I know the cutout charging circuit that goes through the light switch needs a good ground, but have never heard of an ammeter needing a ground.
I got that information from more than 1 source. The service manager at the local Case/IH dealer who is scoring a solid +90% on issues I go to him with on these old gems, and a handful of old time local farmers that were/are decent mechanics in their own right.
Make sure the channel around the dash cover, the edge of the dash box, the steering support where it connects to the dash box and the connecting bolt are all clean n shiny
I think the new ammeter made all the difference.[/quote]Urbish wrote:........ I added some star washers on the back side under the nuts and all was good, oh and a new ammeter.
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