Question about John Deere 420,1020,2010,2020,2510,2520 Tractor Float

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The battery in my john deere 4100 tractor will not stay charged......the alternator has checked out to be OK

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017



Try the John Deere web site, I think they will be able to help. donnyb60

Posted on Mar 21, 2009

  • 142 Answers

SOURCE: John Deer riding mower

Here is a link to John Deere website for this model, it states that it has a 16 amp charging system. It also has the phone numbers listed for contact, and requesting the manuals for this mower.

Posted on Sep 20, 2008

  • 15935 Answers

SOURCE: system creeps down even when tractor is operating.

There are 2 potential problems -
1. Leaking spool on the control valve - rebuild the vale.

2. Cylinder blow-by. Disassemble piston and replace the seals.

To test if its the cylinder - retract the cylinders all the way... remove the hoses on the blind end (non rod end) of each cylinder, and again pull the valve to the retract position.

If fluid continues to pour out of the cylinder - the piston seal is damaged, and the affected cylinder must be repaired.

To test if the valve spool is faulty - disconnect the a and b ports just after the valve. Turn on the system and check for seepage from the disconnected lines (without moving the lever).

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

Posted on Apr 19, 2009

  • 10865 Answers

SOURCE: john deere 420 trouble starting getting gas and

The engine needs air, so be sure the air filter is clean. If it is not, replace it.

The engine needs spark. Replace the spark plug and be sure that the battery has a complete charge.

The engine needs good fuel so be sure the gas is newly purchased, not gas that has been sitting around for months.

Posted on May 19, 2009

  • 156 Answers

SOURCE: no power to back wheels

Sometimes I have used meters on these toys and received false readings due to numerous tabs in the switches.
As long as the wires are secure, I would replace the high/low switch and the reverse switch.
You can get the parts here
I get all my Peg perego parts from them and they seem to know what they are talking about if you need any help.

Posted on Jun 01, 2009

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New battery on F525 John Deere mower won't stay charged-battery connections are good-is voltage regulator bad?

Either the alternator is not charging properly or the diodes in it are defective and discharging the battery when the ignition is off.

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battery will not stay charged Deloris, Have battery tested could be bad (lucky to get 2 seasons out of one). You have to see if charging when running with a digital volt meter. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

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Is the alternator putting out more 13-14 volts? Are all of the terminal connections clean and in good condition, and the wires to the battery as well?

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suspect your battery light is stupid :-)

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My john deere la125 seems to be drawing power wile shut down, it take a week for the batter to go dead, i've pulled the batterer and it stays charged up , I've checked the charging unit and i

What you do is power off the machine, and disconnect the negative battery cable. Put a test light or volt meter between the battery negative terminal and the disconnected negative battery cable.

You will likely have a light or voltage reading...Then you start disconnecting things....I suggest the alternator.

When you have the correct component disconnected and the test light or volt meter shows no current.

If this component is the alternator, they have diode sets inside (or somewhere else in the charging circuit) Typically one diode fails and this causes the draw that you describe. The system often still charges, but at a slightly lower capacity with the failed diode.


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My 316 john deere alternator is not charging the bat. Where can I get a electrical dia. to trouble shoot. Bob

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It could be that the battery is not taking a charge. If you have an external battery charger, try taking it out and charging it.

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If the battery tests good then you probably need to replace the alternator.

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2 Answers


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.

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