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Lubricate blade nuts with what?

Discussion in 'Lawn Mowing' started by watatrp, May 10, 2006.

  1. watatrp

    watatrp LawnSite Senior Member
    Posts: 496

    I'd like to know what is good for lubricating the nuts and bolts that hold the blades on a commercial rider. I've found that different conditions sometimes cause them to almost be frozen on. I spent an hour last night with a breaker bar and a 4 foot long pipe trying to get them off. Sometimes they come off so easy and sometimes it's like they are welded on. I've tried WD40 and other types of spray on lithium grease. What does everyone use and what works best.
  2. greasy_gun

    greasy_gun LawnSite Senior Member
    Posts: 334

    'Anti-Seize Lubricant', made by permatex.
    Should be able to find it at most parts houses.
    In a dark gray plastic bottle.
  3. Killswitch

    Killswitch LawnSite Senior Member
    Posts: 438

    lol...the lube from hell.

    Dont get that stuff on your hands or clothes.
  4. viking72

    viking72 LawnSite Member
    Posts: 91

    Never-seize, or one of the many clones.
  5. geogunn

    geogunn LawnSite Gold Member
    from TN
    Posts: 3,010

    remember--any lube will allow the nut/bolt to tighten further...as well as hopefully be more easy to remove.......

  6. aDreamSoReal

    aDreamSoReal LawnSite Member
    Posts: 29

  7. ocelot27

    ocelot27 LawnSite Member
    from PA
    Posts: 37

    Get an impact wrench - either electric or air - only use it for removing the blades not putting them back on - use torque wrench and apply the specified torque - usually around 50-80 ft-lbs.
    - john.
  8. Richard Martin

    Richard Martin LawnSite Fanatic
    Posts: 14,700

    I agree with John, the best lube is the correct torque when you tighten the nut. I've put thousands of hours on mowers and I've never had a blade nut tighten up on me.
  9. FrankenScagMachines

    FrankenScagMachines LawnSite Platinum Member
    from IN
    Posts: 4,739

    Actually every now and then when it looks like they're getting dry, or if I start to have difficulty getting them off, I will take my little oiler bottle (that I just use SAE 30 motor oil in) and hit each bolt with a squirt... Ever since I started doing this 2 years ago I have never had one stuck since, and before I did have a few get frozen on.

    True story:
    2 years ago a family friend had me do a spring tune-up on her Toro personal pace 21", I sharpened the blade and while it was out i put a couple drops of oil on the bolt. This spring she had me do it again and that thing just zipped right off, the bolt was still a little moist with oil so I didn't re-lube it..

    Anti-sieze compound works great too but motor oil is less messy to clean up, and cheaper and works in a pinch (who doesn't keep a quart on hand?)
  10. Oldtimer

    Oldtimer LawnSite Bronze Member
    Posts: 1,458

    This comes under the heading of "spend some quality time with the owner's manual".

    The only reason for a blade nut to be hard to remove is improper installation. Read the owner's manual and torque the blade nut to the right spec and it will never work tighten.

    Until eXmark began using the splined insert the torque was 120 on and 120 off. If the blade was torqued to 90 it could work tighten and require around 300 to remove. 300 ft. pounds of torque is a bunch and sometimes it's easier to just grind off the head of the bolt and then the bolt can be unscrewed with your fingers.

    Been there, done that & bought the tee shirt

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