How much do I pitch the deck?

Discussion in 'Lawn Mowing' started by Turtle Creek Lawn Care, Mar 26, 2009.

  1. Turtle Creek Lawn Care

    Turtle Creek Lawn Care LawnSite Member
    Messages: 137

    Hey guys,

    Last year my bob-cat zero turn did not stripe the greatest, so this year i wanted to pitch the deck foward a little. I was wondering how far I should go 1/8 in 1/4 in or what? Also any advise for striping with the bob-cat?

  2. ALC-GregH

    ALC-GregH LawnSite Fanatic
    from PA
    Messages: 7,051

    being a 52in cut, I wouldn't go more then 1/4in measured front to back on the blade.
  3. GracesLandscaping

    GracesLandscaping LawnSite Senior Member
    Messages: 632

    thats probably going to mess with your cut.... buy a stripe kit or make one... you can make one for probably nothing if you have any junk laying around at all.... i wouldn't mess with that pitching the deck.... but if you did i would lower the rear of it not the front. lowering the front will turn the grass over before the blades get to it which might not give you an even cut...
  4. topsites

    topsites LawnSite Fanatic
    Messages: 21,653

    I can not tell you, what will work best for you, because it varies from one operator and one mower to the next.
    So try various settings, see which one works the best, what I would do.

    Take any one setting, then go out for the day.
    You should know pretty much right away if it's better, worse, or about the same, but run it all day on a one setting
    so that you know for sure, then cross that one off the list and maybe give it a score 1-10, now you know that, and next!
    Keep doing that until you hit the sweet spot, and maybe I should call it the "best case scenario."

    Also don't be afraid of trying the other pitch, the back lower than the front, that's what I have
    but do watch out for sideways pitch as you change settings :p

    Oh, I use 1/4" on my 48" but the changes need to come 1/8" at a time if possible...
    Oddly enough my 60" does best with a perfectly flat deck, see it varies.

    Last edited: Mar 26, 2009
  5. ALC-GregH

    ALC-GregH LawnSite Fanatic
    from PA
    Messages: 7,051

    topsites, are you smoking something? The blades should NEVER be lower on the back then the front. Having the deck pitched will yield a better cut, more efficient and easier on the engine.
    52in or less shouldn't have more then a 1/4in pitch. 52 and above, no more then a 1/2in.
  6. joshco84

    joshco84 LawnSite Senior Member
    Messages: 411

    I pitch everything 1/8-1/4 higher in the rear. they cut better and stripe better.

    I have set a LOT of decks, and trust me this is the best all around answer.

    I will say though that i have not set a bobcat deck. My experience is exmark, badboy, toro, snapper, grasshopper, and a few old huskys.
  7. THC

    THC LawnSite Silver Member
    Messages: 2,020

    I tried pitching my 36" toro wb and found that it would mohawk much more frequently between the blades when I am on a curve.
  8. GracesLandscaping

    GracesLandscaping LawnSite Senior Member
    Messages: 632

    ok so maybe i was wrong in my post... someone please explain to me how it is better to have the front of the deck lower than the back!?!? doesn;t make sense to me because i would think this would lay the grass over before the blades got to it... and all striper kits are located on the rear...????
  9. Sammy

    Sammy LawnSite Bronze Member
    Messages: 1,734

    Pitched low in the rear, you will be cutting the blades of grass many times.
    Pitched low in the front, you will be cutting the blades of grass just once.
  10. JimQ

    JimQ LawnSite Bronze Member
    Messages: 1,139

    I'm not sure about this. Never is a big word.

    I've heard that a negative deck pitch can help knock down stubborn stemmy Bahia down South.

    I've never experienced it. Is there anyone down South that can substantiate this?


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