Page 1 of 2 12 LastLast
Results 1 to 10 of 17
  1. #1
    New Member MinnyMoMan's Avatar
    Join Date
    Jul 2011
    Posts
    4
    Tractor
    John Deere 790

    Default JD 790 Front wheel lockup

    Hello everyone am new here. Have searched for a problem I am having with my 790. The left front wheel (as you are sitting on tractor) locks up, mostly in reverse. If you drive forward a little it works fine, then later it will lock again. It is getting worse so going to fix, had the front wheel gear box open at the wheel to look at gears as one thread mentioned but they are fine. So before going any further wanted to get peoples advice. Any knowledge or advice would be helpful, thank you.

  2. #2
    Epic Contributor RoyJackson's Avatar
    Join Date
    Nov 2001
    Posts
    20,449
    Location
    Bethel, Vermont
    Tractor
    John Deere 4520 MFWD, Deere 855D UTV, Z920A Zero Turn Mower and assorted implements

    Default Re: JD 790 Front wheel lockup

    You wrote you opened up the front pumpkin and didn't see any problems. That's good...now it's time to pull the wheel and hub (if you haven't already) and see what's going on there.

    When I had my 790, I was fortunate enough to have no problems with the front end (which are rare, considering the number of 790's that were sold), so I never had to pull anything apart other then when shimmed the hydraulics and routine maintenance.
    Roy Jackson

    "Any government that does not trust its citizens with firearms is either a tyranny, or planning to become one."
    -Joseph P. Martino

  3. #3
    New Member MinnyMoMan's Avatar
    Join Date
    Jul 2011
    Posts
    4
    Tractor
    John Deere 790

    Default Re: JD 790 Front wheel lockup

    I meant i already took wheel off and took that cover off, those gears are fine, have not opened the center trans axle yet

  4. #4
    Elite Member Don87's Avatar
    Join Date
    May 2010
    Posts
    4,226
    Location
    SW Pa.
    Tractor
    Massey Ferguson GC2400

    Default Re: JD 790 Front wheel lockup

    Maybe the first question that should be asked is:
    Are the tires the correct size for the tractor. Improper tire size can cause that also.
    Don

    MF GC2400, FEL, 60in.MMM, 5ft. Cultivator, Single Bottom Plow, Bush Hog RTC48 tiller, MF 2360 front mount snowblower, 5ft backblade. BXpanded Piranha toothbar.

  5. #5
    New Member MinnyMoMan's Avatar
    Join Date
    Jul 2011
    Posts
    4
    Tractor
    John Deere 790

    Default Re: JD 790 Front wheel lockup

    Tires are the right size, now having problems getting the center hub out, will come out about a half inch but that is about it. Anybody have this problem? Any suggestions? Have had plenty of these out but never one that hung up like this.



    Thanks for your help

  6. #6
    Epic Contributor RoyJackson's Avatar
    Join Date
    Nov 2001
    Posts
    20,449
    Location
    Bethel, Vermont
    Tractor
    John Deere 4520 MFWD, Deere 855D UTV, Z920A Zero Turn Mower and assorted implements

    Default Re: JD 790 Front wheel lockup

    Quote Originally Posted by MinnyMoMan View Post
    Tires are the right size, now having problems getting the center hub out, will come out about a half inch but that is about it. Anybody have this problem? Any suggestions? Have had plenty of these out but never one that hung up like this.



    Thanks for your help
    If I recall, there's a circlip you have to pull before you can take it down. Wish I still had my service manual, but that went when I sold my 790.
    Anyway, if no one here can respond wth a picture of the components, you can try JD Parts (https://registration.deere.com/SignI...on%3dfromEmail) and you'll find a number of illustrated break down pictures that might help.
    You will have to register, BTW.
    Roy Jackson

    "Any government that does not trust its citizens with firearms is either a tyranny, or planning to become one."
    -Joseph P. Martino

  7. #7
    Silver Member Tractor Pilot's Avatar
    Join Date
    Apr 2011
    Posts
    101
    Location
    Colorado
    Tractor
    1997 John Deere 770

    Default Re: JD 790 Front wheel lockup

    MinnyMoMan,

    Attached are some pictures from the JD790 service manual on disassembling the MFWD differential and shafts. Let me know if you need more pictures from the manual.

    Bruce
    Attached Thumbnails Attached Thumbnails JD 790 Front wheel lockup-0801011718-jpg   JD 790 Front wheel lockup-0801011718a-jpg   JD 790 Front wheel lockup-0801011718b-jpg   JD 790 Front wheel lockup-0801011718c-jpg  

  8. #8
    Advertiser kennyd's Avatar
    Join Date
    Jul 2003
    Posts
    12,560
    Location
    Westminster, MD
    Tractor
    John Deere 4110, 455AWS

    Default Re: JD 790 Front wheel lockup

    Roy, When are you gonna learn how to do it?
    Attached Images Attached Images
    KennyD
    www.boltonhooks.com

    #BoltOnHooks



    Bolt On Grab Hooks, Weld On Grab Hooks, Specialty Chain and Rigging Accessories, Specialty Hydraulic Components, and MUCH more!

    Simple JDParts Tutorial HERE

    Visit our YouTube Channel

  9. #9
    Epic Contributor RoyJackson's Avatar
    Join Date
    Nov 2001
    Posts
    20,449
    Location
    Bethel, Vermont
    Tractor
    John Deere 4520 MFWD, Deere 855D UTV, Z920A Zero Turn Mower and assorted implements

    Default Re: JD 790 Front wheel lockup

    Quote Originally Posted by kennyd View Post
    Roy, When are you gonna learn how to do it?
    Actually, I forgot my JD Parts password!!
    Roy Jackson

    "Any government that does not trust its citizens with firearms is either a tyranny, or planning to become one."
    -Joseph P. Martino

  10. #10
    Member
    Join Date
    Mar 2011
    Posts
    43

    Default Re: JD 790 Front wheel lockup

    U have to pull both front axles out. Then the center section will come out. I have just had to rebuild the whole front end on mine about 3 months ago. More than likely one of the gears one the left side hub is broke and a broken off tooth is getting caught in between the gears. That is why it stops turning. Mine was doing this at one time when it broke. Easy to fix just "VERY EXSPENSIVE". Each of the outside gears are close to $90 each. More than likely u will need bearing also, $20 each. If u have a ring/pinion issue, $770 for just the ring/pinion. I am willing to bet u have a broke outter gear. What ever it is, if it was me knowing ? I know by having this exact samething happen to me, I would pull it all apart. Check everything, clean all metal out(it's in there) and replace what needs be. Do not drive tractor anymore or u will be spending more money. Like i said, this has just happened to me and close to $1500 dollars later, with me doing all the work, all is well for now! U need to buy u a shop manual 4 your tractor also. Good info in it. Good luck!
    jd 790, 06 duramax with all the goodies

Page 1 of 2 12 LastLast

Similar Threads

  1. Front Blade questions for a JD 755
    By birdlover in forum John Deere Owning/Operating
    Replies: 4
    Last Post: 08-22-2010, 06:41 PM
  2. JD 5105 front wheels making growning sounds
    By andrewj in forum Owning/Operating
    Replies: 11
    Last Post: 07-18-2010, 07:59 PM
  3. JD 790 - FRONT AXLE PROBLEM
    By regor66 in forum John Deere Owning/Operating
    Replies: 11
    Last Post: 06-26-2007, 06:26 PM
  4. Optional "A-Frame Front Hitch" on 3x20/4x20?
    By bam747 in forum John Deere Buying/Pricing
    Replies: 3
    Last Post: 04-13-2006, 04:36 PM
  5. Front wheel width adjustment on 4WD (TL2800F)
    By HurdleMills in forum Iseki
    Replies: 1
    Last Post: 09-10-2005, 10:13 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2016 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.