crawler points

General help and support for your Lindeman through 2010 John Deere crawler
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kmdfarm
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crawler points

Post by kmdfarm » Tue Nov 05, 2019 11:30 am

i have a jd 40 and a 440 crawler both points glaze over when they are left for a time and have to be filed to make them run never had this problem with other tractors in the past what could be the problem

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Lavoy
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Re: crawler points

Post by Lavoy » Tue Nov 05, 2019 1:08 pm

Moisture in the cap, poor quality points, only guesses I have.
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gregjo1948
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Re: crawler points

Post by gregjo1948 » Thu Nov 07, 2019 5:37 am

I'd go with the faulty points. You never said if you have installed new points in both machines that were from the same supplier.(same brand)
JD 350B diesel 6way blade, Case 580B Loader/backhoe, Farmall 504 high crop w/ flail boom mower, International 404 , International 284 diesel w/belly mower, 1972 Ford F600 dump truck, Galion 3-5 roller, Allis Chalmers D17

kmdfarm
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Re: crawler points

Post by kmdfarm » Thu Nov 07, 2019 10:14 am

both were in machines when i bought them the 440 will not start on its own but if you tow it will start up havnt tried that with the 40 someone has put a 12 volt battery in the 440 could that be the problem should it have a resister or something

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Lavoy
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Re: crawler points

Post by Lavoy » Thu Nov 07, 2019 2:18 pm

I would replace the points rotor and condenser on both, convert back to 6 volts on the 440.
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Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com

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gregjo1948
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Re: crawler points

Post by gregjo1948 » Sat Nov 09, 2019 4:50 am

I agree with Lavoy. The 12 volt conversion probably did nothing with the 6 volt starter on the 440 and 12 volts are tough on the starter and the flywheel. 6 volt system work fine if the system and machine are kept in good condition.
JD 350B diesel 6way blade, Case 580B Loader/backhoe, Farmall 504 high crop w/ flail boom mower, International 404 , International 284 diesel w/belly mower, 1972 Ford F600 dump truck, Galion 3-5 roller, Allis Chalmers D17

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Lavoy
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Re: crawler points

Post by Lavoy » Sat Nov 09, 2019 9:28 am

The starters can be converted to true 12 volts, and that is one of my future research projects, but for now I would convert it back. If you keep it 12 volts, use the smallest CCA battery you can find in a automotive style, the cheapest Walmart battery cables you can use, and don't crank it for a long time. Also if you change polarity on the machine, you will need to change polarity on the coil, and you need a ballast resistor, or an internally resisted coil or it will just cook points.
I have good quality tune up kits on hand.
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Parts and restoration for antique and late model John Deere crawlers.
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gaspumpsam
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Re: crawler points

Post by gaspumpsam » Sat Nov 09, 2019 1:38 pm

I wonder if you put a CD conversion pickup unit in, it would cure all points and condenser problems??
They make them for 6 or 12 volt.

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Lavoy
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Re: crawler points

Post by Lavoy » Sat Nov 09, 2019 9:07 pm

Tried the 6 volt, they don't work well. Cranking voltage easily drops too low for the system to fire.
They have run for 60 years on points, nothing wrong with them as long as you run good points and there are no other underlying problems.
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Parts and restoration for antique and late model John Deere crawlers.
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