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  1. #1
    New Member
    Join Date
    Nov 2012
    Posts
    10
    Location
    Wenatchee, WA
    Tractor
    Craftsman GT 5000

    Default vibration when mower is engaged

    I recently aquired a Craftsman GT5000 with the purchase of a house. It looks to be 3-4 years old and seems to be in good shape, been using it twice a week for the past 2-3 months with no problems. Recently I mowed over a small branch (1/2"-3/4" thick) and now there is a vibration while I mow. I looked under the deck and found nothing stuck and cleared everything out as best I could. Blades and belts all seem to be fine. Could the branch have knocked the deck out of alignment or out of balance? It seems that the vibration is worse when I am going up hill and less when going downhill. Any advice before I pull the deck off for closer inspection? On another note the headlights suddenly do not work either, coincidence?

  2. #2
    Bronze Member
    Join Date
    Aug 2012
    Posts
    81
    Location
    Cunningham, Ks
    Tractor
    Kubota L4600HST w/loader

    Default Re: vibration when mower is engaged

    Could have bent the blade spindle. (the shaft that the blade bolts to that spins it).
    2012 Kubota L4600HST w/loader
    "orange chews up the green"

  3. #3
    Super Star Member
    Join Date
    Jul 2011
    Posts
    14,436
    Location
    Yanceyville, North Carolina
    Tractor
    Kubota L4400

    Default Re: vibration when mower is engaged

    I also agree that you should check the blade spindle. I had to replace one on my Craftsman riding mower this past season. Our SIL had run over a rock and the result was a cracked and broken spindle shaft. The part was round $45.00 and it took my SIL and me around an hour to complete the repair. Best wishes.
    The PUPIL who does not surpass his Master, fails his Master.

  4. #4
    Super Member radioman's Avatar
    Join Date
    May 2008
    Posts
    5,605
    Location
    Ontario, NY
    Tractor
    Kubota BX24

    Default Re: vibration when mower is engaged

    try wobbling the blades. if there is no play in it, on a flat surface then try moving blade around slowly noting the height of the blade tip to the ground as reference. If one end looks higher then other in same spot then you may have a bad shaft,bearing, cracked deck holding spindle. If the blade is lower on one side all the time around the deck, then it probably a bent blade. If that the case- a simple blade replacement is in order. cheapest fix you will ever have. However if it relatd to spindle/deck, then I would pull the deck and inspect it closer. a bad spindle can be replace easily but can be a sticker shock of cost, but well worth the money if tractor is still good shape. If it a cracked deck - I would hammer it back in place and take it to a local garage to have it welded up or have a buddy do it for a case of his favorite drink.

  5. #5
    Veteran Member chim's Avatar
    Join Date
    Apr 2002
    Posts
    1,877
    Location
    Lancaster County, PA
    Tractor
    Kubota L3200, Ford 1210

    Default Re: vibration when mower is engaged

    Could also be someone was careless when sharpening the blade and ground a but too much off one side.

  6. #6
    Super Member Gary Fowler's Avatar
    Join Date
    Jun 2008
    Posts
    7,881
    Location
    Bismarck Arkansas
    Tractor
    2009 Kubota RTV 900, 2009 Kubota B26 TLB & 2010 model LS P7010

    Default Re: vibration when mower is engaged

    Usually when hitting an object you will bend a blade, but sometimes it is the blade spindle that breaks, sometimes both blade and spindle. If you have an FEL on your tractor, lift the front of the mower up with the FEL by chaining around the front axle. That makes it easy to work on and see what is going on. Rotate the blades and look for uneven or oval movement in the blades. It should be an obvious reason for vibration. Check the blade lengths also, one blade may have broken off the end (highly unlikely but possible). Replacing the spindle wont be a big problem with the mower raised up, just a slight drain on your wallet. Now would also be a good time to replace the blades. If your have used them for 3 years, they are likely getting pretty thin on the end where the blade has a bend to create uplift. That is where mine and my brother in laws wear out. They end up with a split on the end right where it is bent up. He has to replace his about every year. Mine is 2 years old now and in need of replacement due to this problem.
    One other thing to check is that the bolts holding the blade on are tight. I found one on brother in laws 5000GT mower that was about to fall off the bolt was so loose. It was cutting the grass uneven which caused me to check his blades for bent blade. One was loose and all were worn out on the end making a V split on the end and razor edge on the top of the lifting edge.
    2010 LS P-7010C 20F/20R gear tractor & FEL, 2009 Kubota B 26 TLB, RTV 900 Kubota,17 foot Lund boat with 70HP motor, 2012-20 ft 12k GVW trailer, 2011- 52" Craftsman ZTR mower, 2013 Ferris Zero Turn, 3 weed whackers, pressure washer, leaf blowers, 7 foot bush hog, 8 foot landscape rake , 8 foot 3 PH disc, 2 row cultivator, 350 amp Miller AC/DC welding machine and all the tools needed to keep them all repaired and running.

  7. #7
    Veteran Member JerryK's Avatar
    Join Date
    Feb 2004
    Posts
    1,344
    Location
    Vanderbilt, Michigan, USeh?
    Tractor
    Mahindra 5035, JD 2240, 420

    Default Re: vibration when mower is engaged

    I'd pull the blades and sharpen/re-balance them. The blades build up 'crud' on them... and you might have just knocked too much off one side. Clean them up good before you remove steel to balance them....

  8. #8
    Super Member Gary Fowler's Avatar
    Join Date
    Jun 2008
    Posts
    7,881
    Location
    Bismarck Arkansas
    Tractor
    2009 Kubota RTV 900, 2009 Kubota B26 TLB & 2010 model LS P7010

    Default Re: vibration when mower is engaged

    Sears blades were 1/3 more than what we found them for at Atwoods Farm and Ranch Supply. Blades looked to be same thickness also. Sears price was $29 each x 3 and we got them at Atwoods for $19 each for a $30 savings.
    2010 LS P-7010C 20F/20R gear tractor & FEL, 2009 Kubota B 26 TLB, RTV 900 Kubota,17 foot Lund boat with 70HP motor, 2012-20 ft 12k GVW trailer, 2011- 52" Craftsman ZTR mower, 2013 Ferris Zero Turn, 3 weed whackers, pressure washer, leaf blowers, 7 foot bush hog, 8 foot landscape rake , 8 foot 3 PH disc, 2 row cultivator, 350 amp Miller AC/DC welding machine and all the tools needed to keep them all repaired and running.

  9. #9
    Bronze Member
    Join Date
    Aug 2012
    Posts
    81
    Location
    Cunningham, Ks
    Tractor
    Kubota L4600HST w/loader

    Default Re: vibration when mower is engaged

    I have bent a couple of spindles and the wife even bent a crankshaft on a push mower twice, but I have never bent a blade. Not saying it can't happen, just hasn't happened to me.
    2012 Kubota L4600HST w/loader
    "orange chews up the green"

  10. #10
    Veteran Member chim's Avatar
    Join Date
    Apr 2002
    Posts
    1,877
    Location
    Lancaster County, PA
    Tractor
    Kubota L3200, Ford 1210

    Default Re: vibration when mower is engaged

    Agri-Supply is a good place to deal with. I get blades from them and the price and quality are very good.

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