Blade drive belt keeps slipping off
Results 1 to 3 of 3

Thread: Blade drive belt keeps slipping off

  1. Top | #1

    Join Date
    Dec 2011
    Last Online
    12-15-2011 @ 12:32 AM
    Posts
    3
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Blade drive belt keeps slipping off

    G'day all

    You folks were helpful with my last problem, so I will try again with another.

    The drive belt (which drives the blades) on my John Deere LA110 mower keeps slipping off one of the little pulleys.

    I have bought new belts (on my third one in 4 years). That seems to work for a while (about 15-20 hours running) then it starts slipping off again.

    Eventually it gets to the stage where the mower is un-usable (the belts slips off every few minutes) so I go and buy a new one and it all starts again.

    I have tried tightening the belt, and loosening it (there is a small amount of adjustment available), but that doesn't seem to help. The belts get pretty chewed up after a while, which I guess makes them more likely to slip off.

    Does anyone have any thoughts or similar experiences? I am considering trying to bend the lug on the pulley which is supposed to stop the belt slipping off (to make the gap smaller) but am nervous I might do more harm than good.

    Cheers


    David

  2. Remove Advertisements
    GreenTractorTalk.com
    Advertisements
     

  3. Top | #2
    RandyM's Avatar
    Join Date
    Sep 2010
    Last Online
    03-14-2017 @ 10:30 AM
    Location
    Stoughton, Wisconsin
    Posts
    6,594
    Thanks
    1,047
    Thanked 1,057 Times in 671 Posts
    Well, let's narrow things down a bit. Attached is two possible belts, both have spring loaded tensioners. The problem you are discribing is the result of a couple possible things. First, how old is your machine and how many hours are on the clock. Now, generally speaking a belt is thown for one main reason, pulley miss alignment. Check your bearings with the belt removed to see if you have any worn out that would alow a pulley to sag. You may want to replace the tensioner spring, these get old and lose some force. Check the pulleys to make sure they run true and are not damaged. The point I am trying to make is something is either wore out or damaged. Let's start there. Take your time it may not be obvious right away.
    Attached Thumbnails Attached Thumbnails MP38984________UN14NOV06.gif   PU00858________UN28APR08.jpg  
    Randy __________________________________________________ ___ Be Safe!

    2009 - 2305 w/62 MMM **** 2008 - 2520 w/72 MMM **** 200CX w/49 bucket
    Weight Box w/extension ***** LandPride RTR 1558 Tiller ******* 54 Snow blower
    60 Gallon Demco Sprayer *** 60 Broom ** BB2060 Box Blade**SS2036B Spreader
    Everything Attachments ETA-PluggerV2-60 Aerator

    The more I learn, the less I know.

  4. Top | #3
    rgd
    rgd is offline
    rgd's Avatar
    Join Date
    Mar 2011
    Last Online
    02-18-2019 @ 10:52 AM
    Location
    Flint, Texas
    Posts
    2,160
    Thanks
    317
    Thanked 227 Times in 182 Posts
    Randy nailed it. I just wanted to add...while your doing this,lay a straight edge across the sheaves/pulleys to make sure they are all in the same plane.
    Last summer,my exmarks' deck was a little noisier than usual. It came on gradually and was so subtle,I missed it until it started throwing the belt. I checked all the spindles/bearings and found one that was a little rough feeling. The run out on it still felt good....but I cant put enough side load on it by hand as it see's when working.I changed the bearing...no more thrown belt.
    JD 2520 TLB
    JD gt 275

    Always remember that you're unique. Just like everyone else.

  5. Remove Advertisements
    GreenTractorTalk.com
    Advertisements
     

Similar Threads

  1. LT-166 Drive Belt Replacement
    By bboehm in forum Lawn & Garden Tractors
    Replies: 16
    Last Post: 06-14-2019, 03:09 AM
  2. Belt drive deck vs shaft drive deck
    By Brian in forum Lawn & Garden Tractors
    Replies: 6
    Last Post: 05-01-2012, 06:00 AM
  3. When Should I not be in four wheel drive 4wd
    By Ron JD670 in forum Sub Compact Utility Tractors (SCUT)
    Replies: 15
    Last Post: 01-31-2012, 05:48 AM
  4. Dumb question about shifting gears on a belt-drive manual
    By otherwiseyep in forum Lawn & Garden Tractors
    Replies: 1
    Last Post: 10-22-2011, 01:08 PM
  5. RX63 Drive Belt Adjustment Help?
    By klash2 in forum Lawn & Garden Tractors
    Replies: 4
    Last Post: 05-30-2011, 11:25 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •