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How to hook up the battery cables for a 24 volt system for a john deer 4020 diesel

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Posted on Jan 02, 2017

wilsodfarm
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SOURCE: i need a diagram for the battery wiring on a 1969

They came out with 24

Posted on Jul 29, 2009

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SOURCE: 4020 w/ 24v system sparks when the battery is connected

I usually fix electrical problems by process of elimination. Disconnect the wires attached to generator and touch the battery cable to the battery if it still arcs disconnect the regulator. continue until you find whats pulling current from the battery.

Posted on Jun 05, 2009

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1 Answer

Replace a fanbelt on john deere 4020 diesel tractor


Most older models had the adjustment on the alternator. loosen it and push it toward the engine. remove & replace the belt. Pull the alternator away from the engine until the pulley cannot be turned by hand due to the tension. Tighten the adjustment bolt to secure it. Don't overtighten the belt.

Sep 22, 2014 | John Deere 4020 Gas & Diesel Tractor...

1 Answer

How to wire a 24 volt tractor


Two 12v, connect + to on one battery to - on the other. Make
24v.

Oct 26, 2012 | John Deere 4020 Gas & Diesel Tractor...

1 Answer

I have a 3010 John Deere +24 volt pos ground how do I change from 24 volt gererator to a 24 volt altenator


The 3010 24v JD system is not a true 24v system. It is a balanced split 12v system, with one positive ground battery and one negative ground battery. The only 24 volt accessory is the starter, where the batteries meet in a series to provide 24 volts for starting. All other accessories are 12v, half powered by the positive ground battery and half powered by the negative battery. The generator charges one battery in one direction and the other battery in the reverse direction. Therefore a 24v alternator is not easily adapted to this system.
The usual solution is to change to a 12v system with an alternator, changing the starter to 12v and changing the polarity of the positive ground battery to negative ground.
The cost of a 12v starter and alternator is far less than the cost of a 24v alternator, plus the added benefit of using 12v lights and other accessories.
JD switched to this 12v type of system with alternator during the 20 series production, but used two 6v batteries in a series due to the larger cranking amp rating of the 6v batteries occupying the same physical space.

Jan 10, 2011 | John Deere 4020 Gas & Diesel Tractor...

2 Answers

JOHN DEERE 4020 SETS FOR A COUPLE DAYS AND WONT START, BATTERY DEAD


You either have a dead cell in the battery which is draining power or something is on draining power. On a tractor there is not much to be left on, so check everything. It is more than likely a dead cell and a new battery is in order. To check the alternator to see if it is charging, start the engine and with a volt meter check the voltage at the battery. If it is reading between 13.5-16 volts the alternator is more than likely good. If any lower than 13.5 it is defective.

Dec 31, 2009 | John Deere 4020 Gas & Diesel Tractor...

1 Answer

Diagram for the battery wiring on a 1969 JD 4020


If yoe are still useing two 6v. batteries then the cables go;positive from the starter solenoid to the closest batteries positive post,the negative post of that same battery feeds over to the next batteries positive post,then join the negative to the engine block or tractor frame.If now has 12v. batteries then join up the positive with the positive posts and join the negatives to ground.If the tractor has a 24v system,[not familiar with the tractor ,none in this area and don't have service advisor here at home],hook the twelves up as i previously stated for the 6v batteries.Let me know if you need more help and i can look it up at work for you.

Nov 24, 2009 | John Deere 4020 Gas & Diesel Tractor...

2 Answers

I need to know the proper CCA rating for the batteries on a 1965 John Deere 4020D


Since that tractor was made before they used CCA ratings could it be possible that no such official rating exists?

How about you use what ever size battery that will fit? If I recall correctly it takes two on each side of the tractor and they are rather long, tall and skinny - so much so that no normal battery would ever replace them physically. I'm thinking electrically just about any pickup battery would be a good CCA equivalent. Provided you are paying attention to the 12/24 volt issue on those dual battery JD setups like the 4020 had. If you have two six volt batteries and they work as one 12 volt then you can't use 12 volt batteries for your pickup, in other words.

In the real world the actual difference between a 500 CCA battery and an 800 CCA battery would be hard to tell until the temp got down around 20 below zero. THEN you might get your money's worth, and you might not. In my opinion and with my budget I won't go with a high capacity battery - they just cost too much more. I also don't live in Alaska, so I don't have to worry about it often enough to be cost effective. I get my warm fuzzy feelings from somewhere else...

If you are having troubles starting with normal rated batteries, you won't escape the same problems with higher capacity batteries. The troubles just cost more.

Jul 19, 2009 | John Deere 4020 Gas & Diesel Tractor...

1 Answer

4020 w/ 24v system sparks when the battery is connected


I usually fix electrical problems by process of elimination. Disconnect the wires attached to generator and touch the battery cable to the battery if it still arcs disconnect the regulator. continue until you find whats pulling current from the battery.

Jun 01, 2009 | John Deere 4020 Gas & Diesel Tractor...

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