john deere 6420

  1. D

    Missing antenna on 2005 JD 6420 cab??

    Hi, I just bought a 2005 JD 6420 and it does not have a radio. I opened the space for the radio and all the wires are there in a harness adaptor. There is a seperate cable marked antenna but there is not a visible external antenna on the top or side of the cab. I can purchase a radio from JD...
  2. B

    John Deere 6420 Power Quad Power Reverser Problems

    I have a john deere 6420 with a power quad transmission and left hand reverser. When I put in forward, it shows N and has a warning tone ( like when you put in park but the reverser is not in N), but it works fine in reverse. Transmission shifts fine.. any suggestions? Many thanks in advance!
  3. J

    JD 6420 electrical problems

    To begin with we had bought Jd 6420 European edition we bought it in an auction, we had started it but we have some electrical issues with it. As you turn the ignition dash indicates problems with fueal filter water sensor , engine temprature is too high ,transmission/hydraulic oil pressure is...
  4. C

    Jd 6420 suspected electrical issues help!!

    Hello all. I am having a bit of an issue maybe someone can help. The farm which I work has a jd 6420. Now the tractor will not start unless the throttle is wide open, and upon starting the tractor will limit Rpm to 1100. Now if I shut the tractor down and restart it, the machine will rev fine...
  5. U

    help JD6420 4w/d IvT, won't drive in 2 wheel drive unless in differential lock

    Hi I am new to this I hope you can help. We have a 2004 John Deere 6420 4 wheel drive farm tractor equipped with IVT . Our problem is the tractor won't move in 2 wheel drive without engaging the differential lock. This unit was working fine no heavy work. We were just moving hay bales. Drove...
  6. T

    JD6420 randomly shifts to neutral

    So, the 'patient' is a 6420 with about 5200 hours that has been commercially converted (Gilbert) to a two track snow trail groomer. Transmission is power quad (16 - w/ 4 power shifts). This thing is a beast with the aggressive tracks & a joy to operate. It has recently developed a condition...
  7. D

    jd 6420 w/640 self level loader icv switch not working on loader joystick (2004)

    My electronic joystick is not working.icv switch is malfunctioning. I saw a post on here somewhere saying an omron d2jw-01k11 icv switch should fix problem in joystick. Has anyone changed this switch in loader control and if so how difficult is it to do? And what kind of switch did you use...
  8. wildnwackywill10

    John Deere 6420 suspected electrical problem

    I have a John Deere 6420 and I am having some problems with it. The tractor runs fine most of the time but occasionally the tractor will decide to limit the maximum revs at exactly at 1400 rpm, I initially suspected that there may be a fuel problem as recently i replaced all the fuel lines but...
  9. D

    John Deere 6420 Cab Tractor

    I am looking at a used 2006 John Deere 6420 cab tractor. 850 hours with 640 self leveling loader. MFWD Still has plastic on the seat They are asking $62K It is 250 miles away, but I am thinking i need to go look at it. Any feedback on the 6420 in general or the price? Thanks, D.
  10. U

    John Deere 6420 Auto Light is always on

    We have a John deere 6420 and the auto light, located near the PTO lights on the right of the cab, is always on. I cant find out what it means or why it came on. Our tractor still runs the same. Thanks for the help.
  11. U

    John Deere 6420 Auto Light is always on

    We have a John Deere 6420 and the auto light, located near the PTO lights on the right of the cab, is always on. I cant find out what it means or why it came on. Our tractor still runs the same. Thanks for the help.
  12. D

    john deere 6420 icv interlock switch,icv not functioning

    we have a 6420 and the loader will only operate when it wants too and i get the message icv interlock switch, icv not functioning and i believe it had a code but i did not write it down, so does any one have any idea of what to do on this. Also the tractor has the electronic joystick for the loader.
  13. P

    John Deere 6420 fuel problems

    I have a JD 6420 that started running rough replaced both fuel filters. Noticed that fuel does not come out bleeder on filter nearest the cab. Checked fuel pump and it appears to be working good. Can work with filters ie refilling filters and working with bleeder to get air out and tractor will...
  14. P

    Jd 6420 radiator bleeding

    M trying to locate the radiator bleed valve on the jd 6420 tractor. Can anyone help me out. Thanks
  15. A

    Please help with JD 6420 error codes

    Can anyone help me with the following codes for a 6420 John Deere Tractor ? 1-676-31 & 302-122-31 & 1-882-02
  16. F

    JOHN DEERE 6420 RUNNING ROUGH

    6420 RUNS AND IDLES ROUGH, GOT CLEAN FUEL AND FILTERS, ANY IDEA'S
  17. P

    Jd 6420 transmission overheating

    Transmission overheats after operating a 926 disc mower or 348 baler for 2 to 3 hours. I've checked the obvious. Changed. Oil filters cleaned screen. Cleaned radiator. I've noticed the on my two scv controls that the have been set on rabbit. Temp with heat gun on transmission case gets to 230...
  18. G

    John Deere 6420 Diagnostic Codes

    I'm getting codes 306060 and 306055 error messages. John Deere refuse to come out to my farm and look at the problem, but won't give me the meaning of these codes. As I'm a diesel fitter, I'd like to fix these problems myself but as they won't give me the code meanings, I'm in a bind as I can't...
  19. Hank69

    John Deere 6420 powerqaud 24 speed Foaming oil

    Hey all Newbie to the site, I'm hoping to find some info on the John Deere powerqaud 24 speed as used in the 6420, I have been helping a friend with this unit but now at a stand still, The trans/hydraulic oil is foaming/airating excessively causing the loader and steering to be very jerky and...
  20. P

    Jd 6420 syncroplus trans question

    I'm trying to find find the drain plug with the intake screen on my 6420 syncroplus 12-4transmission. The ops manual shows it on the right side. On page 115-3. No. 7. Does anyone know where it is and what it looks like. Thanks
  21. P

    Jd 6420 transmission overheating

    Jd 6420 tractor with 12r syncroplus transmission overheats after 3 hours of operating. Tractor has 1500 hours. Fresh hydraulic oil and filter change. The manual shows a clean out screen at larger filter. There is none there. Heat gun reader trans. Temperature gets up to 230f. Anyone have any...
  22. P

    Jd 6420 transmission overheating

    12r syncroplus transmission over heats after 3 hours or so pulling 926 mower conditioner heat gun reading up to 230f. Changed fluids and filter. No cleaning screen visible at larger filter as indicated by manual. Any ideas of what my problem may be. 1500 hours on tractor. Thanks
  23. L

    jd 6420

    i have jd 6420 this morning when i started it the heater light and the i light started flashing after 1 minut.then the tractor cut out.we had a heavy frost -8c.i think the diesel could have frozen any ideas::confused:
  24. P

    John Deere 6420 powerqaud 24 speed

    Tractor has some issues when temperatures are vary hot out side 3-third gear disappears in all ranges after tractor has been running for a couple of hours. It returns after tractor cools down. Rad has been cleaned coolant level is at the MAX mark. Oil levels are good. This becomes a real issue...
  25. W

    Replacing Radio Antenna on JD 6420

    I purchased a better grade radio antenna to replace the one that came on my JD 6420 tractor. The antenna is extremely difficult to get to....front right section above the cab liner. The replacement antenna is a metal type with a base that will mount nicely on the rear sidebar support of the...
  26. M

    JD 6420 $13,000 higher than M105X

    I bought a M105X about a month ago I had heard they were about the same price as the JD.So I stopped by the local dealer last week and got a quote on tractor and loader and was blown away at the difference.I do not have as much buyers remorse now.
  27. M

    JD 6420

    No, I didn't sell my faithful little TC25D. I was outside last evening assembling my wife's new tow behind sprayer and heard the unmistakable sound of a tractor coming up the road. It was the township mowing the grass at the edge of the road. They had been using an old Massey. Lo and behold...
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