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New blades New noise?

Discussion in 'Lawn Mowing' started by kdlklm, Jun 11, 2007.

  1. kdlklm

    kdlklm LawnSite Member
    from Canada
    Messages: 64

    I put on a new set of blades, and now I have a bit of a rattling noise. My initial thought that I forgot to strap down the belt cover on the deck, but that was not the case. I went with a set of highlift blades, I was using medium lift before. The noise wasn't there until I change the blades. everything seems to be solid. Any thoughts as to why.
  2. ahah

    ahah LawnSite Member
    from 5
    Messages: 70

    Sometimes they make them a tad long. They might be hitting each other in the cutter housing.

    GSPHUNTER LawnSite Senior Member
    Messages: 311

    Mine hit each other. I was going to get on here and ask if that was a problem, but haven't yet.
  4. TLS

    TLS LawnSite Fanatic
    Messages: 7,943

    If blades are touching, you have the wrong blades.

    As for the rattling noise....they're probably way out of balance. Most new blades aren't even close to being balanced.
  5. kdlklm

    kdlklm LawnSite Member
    from Canada
    Messages: 64

    if they are hitting, is it generally a consistent rattling noise. that's amazing that they would sell something out of balance.
  6. Nosmo

    Nosmo LawnSite Bronze Member
    Messages: 1,216

    It's true but it only takes a short time to check the new ones before you put them on. But if I were you I'd check to see if they are clearing everything under the deck and each other.

  7. bohiaa

    bohiaa LawnSite Fanatic
    Messages: 5,220

    there flexing......

    it may be a defect in the blades..... there made to flex.... but if there were a bad batch of steel... they will flex too much....it will make a whistleing noise and sometimes a whining sound.....
  8. TAZ

    TAZ LawnSite Senior Member
    from Ohio
    Messages: 344

    You would be surprized how far out of balance some brand new blades are. Manufacturing tolerances on length and the placement of the center mounting hole are just a few reasons why. If you have a good quality balancer you will see it.

  9. kdlklm

    kdlklm LawnSite Member
    from Canada
    Messages: 64

    I don't have a balancer, what is usually the best technique to check them.
  10. TLS

    TLS LawnSite Fanatic
    Messages: 7,943

    With a balancer.:rolleyes:

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