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Farmall & IHC Tractors Discussion Forum
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300 Farmall Points

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IaGary

01-03-2006 15:14:07




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Opened the distributor to work on points and the shaft that turns the rotor has a lot of sideways play in it. Is this common until you put the plastic plate thats under the rotor on? Seems to me this would wear into the plastic plate. Also wondering if I can put electronic ignition on a 8 volt 300? What does it cost? Thanks for any infro.




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Redgreen Man

01-03-2006 19:00:41




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 Re: 300 Farmall Points in reply to IaGary, 01-03-2006 15:14:07  
If you will put a 6 volt battery like goes in one side of a 4430 Deere in your 300, with good 00 cables, it will start fine. Sounds like you need to rebuild that dist. or get a re-built one. I have a 350 and MTA still on 6 volt with the big battery I speak of, and they will start anytime as long as points and cond, and plugs are in good shape. Started the MTA today, hadn't been started for a few weeks and only turned over twice!

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IaGary

01-03-2006 16:29:07




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 Re: 300 Farmall Points in reply to IaGary, 01-03-2006 15:14:07  
Is the shaft that turns the rotor just a short stub shaft that is removable from long dist. drive shaft. Maybe I'm not very clear. Lets try it this way is the dist. shaft in more than one section or is one piece from gear drive to the rotor? I'm seem to burning a lot of points on this tractor is why I'm considering electronic.



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Nat 2

01-04-2006 05:12:52




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 Re: 300 Farmall Points in reply to IaGary, 01-03-2006 16:29:07  
I believe it's a single shaft all the way through, and it inserts from the front of the distributor. It's got a "T" on the front end that fits in a slot in the hydraulic pump.

The shaft wobble is a BAD THING. The bushings are shot. If you don't fix it soon, you'll end up buying a rebuilt distributor and eating the core charge.



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John T

01-03-2006 16:12:13




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 Re: 300 Farmall Points in reply to IaGary, 01-03-2006 15:14:07  
Gary, I would be afraid if theres too much distributor shaft wobble, its more of a bushing/bearign problem versus any plastic or dust cap etc type of thing. However, even if you swap to an electronic ignition unit, too much shaft wobble can affect them adversely plus the timing as they work pretty close tolearnces where a magnet placed on the shaft passes by BUT CANT COME IN CONTACT WITH the pickup coil. It seems the standard elec. ignition are for either 6 or 12 volts, but like Hal mentioned Pertronix will have to answer that question as theres often a failry wide operating voltage range on some of that type gear. It might take a small amount of added coil ballast also if using a 6 volt coil, they will know. You may wanna consider just upgrade everything to the more standard 12 volts???

John T

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Janicholson

01-03-2006 17:43:24




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 Re: 300 Farmall Points in reply to John T, 01-03-2006 16:12:13  
Two items :
Operating on 8 volts will use points at a rate that is shorter in service life by a factor of 2 or so.

The rotor shaft should have no detectable wobble in it. Measured, it should be less than .oo2" in any direction (measure more than one with a dial indicator) as John T indicates the electronic conversion will not function as desired with radial runout on the shaft.
JimN



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gene bender

01-04-2006 04:49:05




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 Re: 300 Farmall Points in reply to Janicholson, 01-03-2006 17:43:24  
8V does not wear out points faster or have you had a problem with 8v on your tractor. 8V batts have been used for many years and never have heard or experienced and problems. Why do they keep making 8v batts if they cause problems?



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IaGary

01-03-2006 20:08:12




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 Re: 300 Farmall Points in reply to Janicholson, 01-03-2006 17:43:24  
Why would 8 volts cause them to burn faster when the same points are used in a 12 volt 560. Unless the coil is putting out more juice. Just wondering.



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KEB

01-03-2006 20:41:15




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 Re: 300 Farmall Points in reply to IaGary, 01-03-2006 20:08:12  
Its the current through the points that causes them to burn, not the battery voltage. Using an 8 volt battery with a 6 volt coil results in more current through the coil (and the points) than using a 6 volt battery (higher voltage + constant resistance = higher current). More current = more heat = less point life.

12 volt coils either use external ballast resistors to limit current, or are designed with internal resistance to do the same thing. If you really want to burn up points quick, connect a 12 volt battery to a 6 volt coil without a ballast resistor!

PS...a bad or wrong value condensor can also burn points. In this case, there will be metal from one contact deposited on the other - which contact depends on whether the condensor has too much or too little capacitance.

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IaGary

01-03-2006 20:07:32




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 Re: 300 Farmall Points in reply to Janicholson, 01-03-2006 17:43:24  
Why would * volts cause them to burn faster when the same points are used in a 12 volt 560. Unless the coil is putting out more juice. Just wondering.



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El Toro

01-03-2006 15:35:41




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 Re: 300 Farmall Points in reply to IaGary, 01-03-2006 15:14:07  
You need to contact Pertronix Inc at 1-800-827-3758. They can probably tell you if their electronic ignition will work on your tractor. Hal



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