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Scalping just started on 3 yr old machine HELP!

Discussion in 'Lawn Mowing' started by scarecrow, Jul 13, 2005.

  1. scarecrow

    scarecrow LawnSite Member
    from texas
    Messages: 7

    Hope someone has some insight on this... I have a Lesco 54" Viper that I have used for 3 years. I bought the machine brand new and i'm the only one that mows with it. A month ago it started cutting uneven, and scalping during turns. The cut is about 3/4 inch lower on the right side of the deck. When I turn, it appears that the front of the deck cuts a half-moon in the turf. Air pressure in all tires is accurate, yes I have checked plenty of times. I have changed blades, and even bought a new set, still the same problem. I have greased everything with zerks, and sprayed WD-40 on all bushings and everything else associated with the deck. I have taken the mower to my local Lesco repair facility 3 times, he measures the blade height each time, and they are within 1/16th of an inch. I have run out of ideas. I don't know if a spindle could be broken, or the deck could be bent, the sidewalls on the tires are weak and flex??? Surely someone out there has been thru this too. Any help would be great! Thanks :)
  2. MJLsLawnCareNmoreLLC

    MJLsLawnCareNmoreLLC LawnSite Senior Member
    Messages: 840

    Have you hit anything with the blades recently, like a rock or a pipe? How many hours on the unit? I would guess that either the deck is warped or a spindle went bad. Take the blades off and measure the distance from the bottom of the spindle housing to the bottom of the spindle shaft. They should all be the same. Ive had spindles go bad and literally the whole blade dropped half an inch.
  3. daveintoledo

    daveintoledo LawnSite Silver Member
    Messages: 2,587

    spindles probably bent
  4. scarecrow

    scarecrow LawnSite Member
    from texas
    Messages: 7

    Thanks for the input, i'll check the spindles tomorrow or friday. I thought that if i had a bent or borken spindle, the blade would be loose, or hitting either the deck or the other blades. I've considered buying new tires, someone said the sidewalls break down over time, but the machine is only 3 years old with less than 500 hours on it. Thanks again!! Any more guesses are welcome, this has me baffled!!
  5. LawnBoy89

    LawnBoy89 LawnSite Senior Member
    Messages: 967

    That happens to me sometimes but I don't think it's my mower I try to just take the turns a little slower and with more caution, I think it is the terrain in my situation, since it only happens on certain lawns, but if this never happened before for you then it could be the mower. Does it happen everytime you turn 180 degrees?
  6. Oldtimer

    Oldtimer LawnSite Bronze Member
    Messages: 1,459

    Check the tire pressure, jack the machine up and measure the circumference of the tires. If a tire has been over inflated it will grow.
  7. dishboy

    dishboy LawnSite Fanatic
    from zone 6
    Messages: 6,113

    Check the HOC of all the blades at different positions with a HOC tool from John Deere for around nine dollars and you will isolate your problem real fast. Get a level and find the best section of concrete floor before proceeding.
  8. scarecrow

    scarecrow LawnSite Member
    from texas
    Messages: 7

    Thanks for the help.... My mechanic used a John Deere Height measurement tool, and showed me, all blades are within 1/16 of an inch. I figure the deck is tweaked, or i've got a bent spindle or maybe a bad tire or even a front caster that's bent a little. I'll check this weekend.....
  9. lawnjockey75

    lawnjockey75 LawnSite Member
    Messages: 18

    We have the same problem with one of our scags. I don't know how your lesco is designed, but I ordered the long piece of all-thread, and new chains that suspend the deck. Chains stretch over time. When I get the parts, Ill let you know.
  10. Likestomow

    Likestomow LawnSite Senior Member
    Messages: 997

    Your front end parts are worn out. Take it back to Lesco and they will rebuild it. That's the price of buying a cheap mower.

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