Page 1 of 3 123 LastLast
Results 1 to 10 of 23
  1. #1
    Member
    Join Date
    Aug 2011
    Posts
    32
    Tractor
    John Deere 4100

    Default Charging problem on my John Deere 4100

    Hello! I've had a little problem with having a dead battery. I hooked up a flamming river disconnect switch to see if that would fix it and it seems like it could be the alternator. After charging the battery on a slow charge overnight the charge was at 12.68 volts. I parked it outside during the day and let it run for 15 min with the lights on and the volts dropped to 12.02 while running. I turned the lights off, let it run some more and was slowly climbing to 12.28v and then 12.30 volts. I checked it late last night and the volts after sitting was 12.5v. Note, this is a new battery too but I thought the problem was the battery at first. Does this sound like a bad alternator to anyone? Shouldn't the volts when running be more like 13.0 volts??? Need help... I'm a rookie at this stuff but I think I am on the right track.

  2. #2
    Platinum Member Henri88's Avatar
    Join Date
    Nov 2009
    Posts
    734
    Location
    Northern N.B.
    Tractor
    2008 JD 2305

    Default Re: Charging problem on my John Deere 4100

    Yes, I do think you are on the right track. Charging at half throttle should give you close to 14V with lights out.
    Henri

    How could you be told I was french?

    Rotary cutter 4' Howse , mid mount mower 54'' , f.e. loader 200CX , tiller RT1150 Frontier , cultivator PC1001 Frontier , middle buster PM1001 Frontier , JD 47'' front snowblower , pallet forks , 4' boxblade Agriease , grass-sweeper , quick hitch Speeco , trailer hitch , cab Jodale-Perry , trailer 16' galvanized Easy-Hauler ,

  3. #3
    Bronze Member
    Join Date
    Dec 2002
    Posts
    73
    Location
    N.Y.
    Tractor
    JD 4400 w/R-1 & R-3

    Default Re: Charging problem on my John Deere 4100

    Check for proper belt tension. As stated 14v running, not at idle. Battery will (should) maintain 12.5 +- after setting. If stored in barn( any place) mice love the insulation on wires. Have found shorts.

  4. #4
    Member
    Join Date
    Aug 2011
    Posts
    32
    Tractor
    John Deere 4100

    Default Re: Charging problem on my John Deere 4100

    Thanks for the advice! I think the next step is to put it at half throttle when running and double check it. I do not believe I was at half throttle when I checked it. Thank you.

  5. #5
    Member
    Join Date
    Aug 2011
    Posts
    32
    Tractor
    John Deere 4100

    Default

    Ok guys, I changed the voltage regulator per advised by dealer and no good. I changed the alternator and went from running volts with lights on from 11.97 volts to 12.23 running volts with the new alternator. Without the lights on it runs at 12.5 volts. What do you think? I'm thinking I should be ok. Hopefully so because the snow is coming. When the tractor is shut off it stays at 12.68volts which is the same as my suv. I think I have it fixed. No where near 13.90 volts though like some stated.

  6. #6
    New Member
    Join Date
    Nov 2011
    Posts
    9
    Tractor
    JD 4100

    Default Re: Charging problem on my John Deere 4100

    OK, I have the same problem as Towmater. I keep a trickle charge on to keep the battery voltage up. I have had the battery load checked and it is fine. I have checked the termanals and they are clean of corrosion. With a fully charged battery of 12.9V I started the tractor. At idle 1000 rpm I have 11.95v. At 2500 rpm I have 12.21v. After 5 minutes of run time, shutting down the engine and the battery voltage is 12.7v. Are there any adjustments to tweak the voltage regulator or alternator. On my cars and trucks I just check ther battery voltage with the engine running to check out the alternator. I would have thought that Towmaster would have had 14v with a new alternator. Are there any checks that I am missing? Is there a good place to get an alternator? I can live with the trickle charger that is directly wired to the battery and easy to connect/disconnect but the wife doesn't like getting stranded in the field when she shuts down the tractor after a long idle.

  7. #7
    Member
    Join Date
    Aug 2011
    Posts
    32
    Tractor
    John Deere 4100

    Default

    Well absaroke, I'm still having the issue. Bottom line is mine is not charging enough while running. I can have a full charge and it still will drain with the new alternator. After a heavy day of use and running and starting it sometimes will die at the end of the day. I've recharged the battery and the at times will sit for three weeks with the battery disconnect switch disconnected and will fire right up. So I've feel it just is not charging enough while running per my other threads to this. I've decided I'm going to let a dealer look at it in about a week so I'll let you know, I'm tired of screwing with it. I just feel the volts should be much higher when running. Who knows, maybe the dealer sold me the wrong alternator because they were back and forth on two different ones.

  8. #8
    Super Star Member k0ua's Avatar
    Join Date
    Jun 2009
    Posts
    16,176
    Location
    Branson, Mo.
    Tractor
    Kioti DK35se Hydrostat

    Default Re: Charging problem on my John Deere 4100

    Quote Originally Posted by Towmater View Post
    Well absaroke, I'm still having the issue. Bottom line is mine is not charging enough while running. I can have a full charge and it still will drain with the new alternator. After a heavy day of use and running and starting it sometimes will die at the end of the day. I've recharged the battery and the at times will sit for three weeks with the battery disconnect switch disconnected and will fire right up. So I've feel it just is not charging enough while running per my other threads to this. I've decided I'm going to let a dealer look at it in about a week so I'll let you know, I'm tired of screwing with it. I just feel the volts should be much higher when running. Who knows, maybe the dealer sold me the wrong alternator because they were back and forth on two different ones.

    Most modern alternators have a built in regulator, So if the belt is tensioned correctly and all connections are good, then the alternator/regulator is not working correctly, and yes the charging voltage should be about 13.6 to 14.1
    Your battery is running the tractor the alternator is pretty much not even there. Take it and have it tested or get a new one. If you by chance have and external regulator, then start looking there.

    James K0UA
    James KUA

    Kioti DK35se hydrostat with 2 QA buckets, 48 inch. King Kutter Rotary Cutter. 750 lbs ballast box. Loaded tires, Construction Attachments SSQA Lightweight Pallet forks. EA 50 inch single lid "wicked" Grapple. Satisfied Everlast PA160 welder owner How to add a link to a post . Best way to search TBN


  9. #9
    New Member
    Join Date
    Nov 2011
    Posts
    9
    Tractor
    JD 4100

    Default Re: Charging problem on my John Deere 4100

    Towmater and James

    James - I agree what the voltage should be and that mine is not putting out the correct voltage.

    Towmater - I'm anxious to hear the results from the dealer. I was quoted about $350 for an alternator. I will just keep the trickle charger hooked up if that is the real price.

  10. #10
    Member
    Join Date
    Aug 2011
    Posts
    32
    Tractor
    John Deere 4100

    Default

    Update. I dropped off my JD 4100 at the dealer today, printed off my thread from here and gave it to them. He confirmed when running the voltage should be right around 13.5volts. I told him I feel there is a draw somewhere considering when running it is draining and also when shut off it will drain the batteries after about three weeks. BUT- then again that might of been after running it for 1/2 a day and then parking it. I feel it is something charging related. Could very well be the new alternator is bad too. We will see!

Page 1 of 3 123 LastLast

Similar Threads

  1. John Deere 2210 Charging System Problem
    By dattcomm in forum Parts/Repairs
    Replies: 3
    Last Post: 09-23-2013, 10:59 AM
  2. Deere 42'' edge mower deck PA
    By forgeblast in forum Private Party Ads
    Replies: 3
    Last Post: 03-28-2012, 10:59 PM
  3. Nice lunch with John Deere reps.
    By cowboydoc in forum John Deere Buying/Pricing
    Replies: 27
    Last Post: 09-02-2003, 10:48 PM
  4. JD 5400
    By heehaw in forum John Deere Buying/Pricing
    Replies: 13
    Last Post: 04-10-2002, 09:17 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2014 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.