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Little help for the dummy....

Discussion in 'Lawn Mowing' started by JShe8918, May 19, 2008.

  1. JShe8918

    JShe8918 LawnSite Senior Member
    Messages: 946

    This is bad but i have never changed my blades before. I always let my dealer do it he doesn't charge me any extra to do it.... Well i had no means of transporting my scag today and have my high end accounts tommorrow. So i tried to change them my self. Well they vibrate. How do i balance them and also are they timed.... I know that is probably the dumbest question on the site. but any help would be much appreciated.... Thanks.

  2. AWR

    AWR LawnSite Member
    Messages: 45

    they sell a little balancer you can get it at home depot etc, and no they are not timed
  3. razor1

    razor1 LawnSite Bronze Member
    Messages: 1,985

    Did/do you sharpen them, or does the dealer? I doubt that its the balance, I've never had to balance a blade yet.
  4. gorknoids

    gorknoids LawnSite Senior Member
    Messages: 316

    I'm guessing that you don't have a balancing fixture...... Take them off, sharpen them until they LOOK balanced (and sharp) and try laying them over a pencil. Check them several times using the pencil, decide which side is heavier, and grind that side. Once the blade balances with the pencil pretty much dead in the center of the hole, break out the IPB and look up the part number for every bearing in the deck.......
    You really have to become an expert on every facet of equipment maintenance. As much as I respect our local experts, I can rebuild everything that I own (Except for the trucks) cheaper and quicker than the guys who are doing tune-ups on Sears push mowers at the Toro shop.

    I don't know about the specific means of timing Scag blades, but if they are 90 degrees offset when they are sitting still, odds are that they'll clear each other just fine.
  5. JShe8918

    JShe8918 LawnSite Senior Member
    Messages: 946

    Thanks. so basically i need to take them back off and balanace them. Or could i have possibly not tightened them enough because i had to use a cheater bar to get them off and i didn't use it putting them back on....
  6. Bigdog9501

    Bigdog9501 LawnSite Member
    Messages: 50

    Maybe they were on upside down?
  7. mngrassguy

    mngrassguy LawnSite Silver Member
    Messages: 2,167

    If the blades are not tight, they will vibrate.
  8. topsites

    topsites LawnSite Fanatic
    Messages: 21,653

    Only chain-drive systems have timed blades, all belt-driven ones are exempt from this.
    So unless your mower drives the blades via a chain and gears, they are not timed.
  9. GravelyNut

    GravelyNut LawnSite Bronze Member
    Messages: 1,594

    Not true. Gravely/Ariens made a ZTR that used a timed belt deck. I have one of those decks. Might be the only one to still exist. They worked fine as long as the belts held up. When the belt gave out, the blades would jump timing and come together. Usually resulting in destruction of the blades, spindles, or the whole deck. Gravely/Ariens replaced them with decks that weren't timed and didn't have blades that could come together. The timed deck used a cog tooth belt and pulleys. Like you would find in an automobile engine.
  10. bill8379

    bill8379 LawnSite Senior Member
    Messages: 778

    I always balance the blades, the metal cone thing only costs $7 or something like that. It makes sense to me to keep something that spins so fast, balanced.

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