farmall h electrics

Farmall H, HV & Super H, 300 & 350, 1939-1958

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mario
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farmall h electrics

Postby mario » Wed Apr 25, 2018 7:52 am

Maybe someone can shed some light on a problem with a farmall h; sorry, no farmall h forum. Tractor has stock 6 volt ignition. Upon starting, at times, no responce at all from starter button; dead. The remedy is to loosen the starter motor bolts, slightly wiggle starter, tighten bolts and press to ignition.. The starter motor has been rebuilt. Maddening! Any thoughts?

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Urbish
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Re: farmall h electrics

Postby Urbish » Wed Apr 25, 2018 10:21 am

I would guess that you have a high resistance connection somewhere in the circuit. Given your remedy, I would suspect that the body of the starter is not grounding good against the tractor. The 6V setups require a lot of amperage, and are more sensitive to high resistance connections than a 12V system. You can use a multimeter set to show resistance to check point to point along the way. Or the contacts in your starter button are going bad. You can check that by jumping the cable terminals on the back side of the button with a screw driver.

Jim Becker
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Re: farmall h electrics

Postby Jim Becker » Wed Apr 25, 2018 12:34 pm

It could be a bad connection of the cable connecting to the starter. Try jiggling the cable without unbolting the starter and see if that makes a difference.

Do you get some noise from it on the first hit of the button? Maybe the drive gear is jamming in the ring gear. If so, loosening and jiggling will shake it loose. The problem is either a defective Bendix drive or battered teeth on the ring gear.

mario
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Re: farmall h electrics

Postby mario » Fri May 04, 2018 10:58 pm

OK, so maybe its not an electric problem. I need any feed on what is the potential of increased plug fowling as a result of years of unleaded fuel use. This is a friends tractor, and in my own I'm fairly consistent about using lead additives to fuel. My "M", cub, willys, and old ford all run well. All 12 volt converted. My friend "H" is still 6 volt. Ive heard that unleaded fuel will cause valve problems leading to maybe sloppy combustion sealing at the valves. He gets ignition once and then future attempts at starting result in much cranking, weakening battery, eventual worn battery, and no start. Plug exam yields black carboned electrode. My guess is bad valves do to years of unleaded ethanol based fuel.

Any thoughts?

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Shane Nelson
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Re: farmall h electrics

Postby Shane Nelson » Sat May 05, 2018 2:35 am

Lead doesn’t help, there’s been many discussions here about it and 99.99% of the people don’t run it and have no problems. Here’s one viewtopic.php?f=1&t=99598&p=786015&hilit=Lead+additive#p786015
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Jim Becker
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Re: farmall h electrics

Postby Jim Becker » Sat May 05, 2018 8:30 pm

Shane is right. All the fake lead additives do is clean out your wallet. Plugs actually stay clean longer with unleaded gas. The black deposits on the plugs are unburned carbon. Either the plugs have simply been in there too long without cleaning or the heat range isn't high enough. Clean them or replace with something in the heat range of a Champion D-21. Maybe the tractor just needs a good old fashioned tune-up.

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Re: farmall h electrics

Postby pokitisme » Mon May 07, 2018 5:18 pm

Well coming from a Layman's point of view here. I found with my Farmall H that the simplest problem was probably the most accurate problem. Take all of your connections clean the hell out of them. I know it sounds maddening and even though they're shiny they still may not be clean get some kind of rotary wire brush and brush the hell out of those things. All connections. and also watch about over tightening bolts I know you might be thinking if I tighten the bolts on the push button starter just a bit tighter that might work but that can damage your starter. It will pull the bolt out and break it internally. By over tightening. Also as I had various other problems you might want to check the resistor and make sure that's not damaged. And like they said use a Multimeter watch a few YouTube videos on checking continuiti and using a multimeter to guesstimate power. Also in my case I use a 12 volt tester I'm not sure if that would work in your case but it did work very well for testing connections. Also look into the advice that the regular guys on the formed give it does help out.
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Re: farmall h electrics

Postby Bigsaw70 » Tue May 29, 2018 12:41 pm

I'm brand new here and am hoping I'm posting this in the right part of the site. My father in law has a Team all model G that he had sitting outside on a farm for a lot of years ,it can when last used a few years ago. He started working on it by having the carb rebuilt, thank flushed online fuel filter and new 12 volt battery. There was no spark, so he changed out the plugs,cap wires,points,rotor and condenser. The tractor will not get spark. I was there yesterday looking at it and had a 12 volt test light. Three was power going through a resistor,to the coil. The points were tapped at 20,000ths. I checked both terminals on the coil by grounding the rest light to the negative battery terminal, I was getting juice to both terminals on the coil. Is it supposed to get juice to both sides and anyone have any suggestions where to go from here? Thanks


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