Impact wrench blade removal

Discussion in 'Lawn Mowing' started by weeze, Jan 29, 2012.

  1. weeze

    weeze LawnSite Fanatic
    Posts: 7,821

    up until now i've always removed and installed blades by hand with a socket wrench and block of wood. now i have a battery powered impact wrench. do you still put a block of wood in there to keep the blade from spinning or do you just unscrew the bolt without blocking the blade off? also when re-installing it what method do you use? before i would push the blade with my left hand while pushing the socket wrench in the other direction with my right hand. sorry if this seems like something everyone should already know but i've never owned an impact wrench until now. thanks for any help.
     
  2. unkownfl

    unkownfl LawnSite Gold Member
    Posts: 3,838

    Keep your hands clear of the blades even when using the impact. You should be able to not hold the blades for both install and removal of the blades if you have an electric clutch. A manual throw out pulley system for blade engagement may require a wood chock. Be sure not to over torque the bolts. It's always best to always start the bolt/nut by hand then tighten with a torque wrench. Remember sometimes the blade bolt holds the bearings and over torquing can also cause bearing failure and the threads to stretch when using an impact.
     
  3. Landscape Poet

    Landscape Poet LawnSite Gold Member
    Posts: 3,637

    I am with Unknown. And agree with his caution on not over torquing the bolts.
     
  4. weeze

    weeze LawnSite Fanatic
    Posts: 7,821

    ok so on my ztr no block of wood is needed but on my pushmower a block will be needed?

    hey michael go look at my pic thread i asked you a question in there about the blade sharpener.
     
  5. unkownfl

    unkownfl LawnSite Gold Member
    Posts: 3,838

    If you mean push mower like in where the blade is bolted to the engine you shouldn't need to chock the blade unless you hit something or over tightened it. The ZTR could go both ways depending on how tight it is. You shouldn't need to chock either tightening it.
     
  6. weeze

    weeze LawnSite Fanatic
    Posts: 7,821

    ok i'm just trying to avoid the blade spinning around while tigtening or removing. when i turned it with a socket it would turn the whole spindle if i didn't block it off. i think i read somewhere there is a risk of cranking the engine on a pushmower where the blade is connected directly to the engine. i guess it can't happen since i wouldn't be holding down the safety lever on the handle. :laugh:
     
  7. unkownfl

    unkownfl LawnSite Gold Member
    Posts: 3,838

    An impact usually doesn't turn that fast when its under load. I don't think it would be possible to start an engine with one.
     
  8. weeze

    weeze LawnSite Fanatic
    Posts: 7,821

    yeah maybe that was another type of wrench/driver they were talking about.

    so when you remove/install the bolt just comes out and the spindle/blade doesn't turn at all?
     
  9. unkownfl

    unkownfl LawnSite Gold Member
    Posts: 3,838

    Usually that is what happens. Same thing like on an alternator pulley on a car or harmonic balancer.
     
  10. weeze

    weeze LawnSite Fanatic
    Posts: 7,821

    ok thanks for the help. :)
     

Share This Page