Pitch of mowing decks?

Discussion in 'Lawn Mowing' started by Bunton Guy, Jun 7, 2003.

  1. Bunton Guy

    Bunton Guy LawnSite Bronze Member
    Messages: 1,909

    One of my hydro bunton walk behinds has a fixed deck. After cleaning it the other day I noticed that the front end sits down quite farther than the rear. I looked at the frame/deck were it comes togather and you can lower the rear of the deck to match the front by moving the deck bolts down...what will this change? Will it affect the cut by making the deck pitch even instead of what currently has the rear higher than the front? IT would be nice to find something to create more of a vacume in the deck so I hope this does the trick.
  2. gvlawncare

    gvlawncare LawnSite Member
    Messages: 25

    I know on my zero turn, the owners manual says that the front of the deck should sit 1/8" to 1/4" lower than the rear. Yours may be different????
  3. Bunton Guy

    Bunton Guy LawnSite Bronze Member
    Messages: 1,909

    My front is sitting like 2" lower!
  4. redbull

    redbull LawnSite Member
    Messages: 182

    Thats WAY to low. Around an 1/8" is standard. I'm surprised your cut hasn't been UGLY
  5. CO.d 502nd

    CO.d 502nd Banned
    Messages: 288

    geez two inchs like redbull said 1/8 to 1/4 inch or somewhere between the two .
  6. rodfather

    rodfather LawnSite Fanatic
    Messages: 9,501

    2"!!!...I'm surprised the damn thing even cuts???
  7. Auroris

    Auroris LawnSite Member
    Messages: 155

    There are a lot of threads that mention deck pitch, but I have a hard time finding anything that reallys explains the reasoning.

    Why should a deck have a pitch at all as opposed to being level?

    I noticed that my eXmark TTHP is higher in the rear than in the front, too.
  8. 1grnlwn

    1grnlwn LawnSite Bronze Member
    Messages: 1,261

    A deck pitched forward will cut the grass only from the 270 degree position to the 90 degree position. (front half) This minimizes the amount of clippings that end up in the back half of the deck. The general design of a side discharge mower is to transfer the clippings across the front from one blade to the other and out. A 2" rake would probably leave a fluted look to the cut. To prove this to yourself cut grass in reverse , what happens?
  9. Bunton Guy

    Bunton Guy LawnSite Bronze Member
    Messages: 1,909

    When I cut in reverse it leaves all the clippings on the lawn instead of discharging them.
  10. rodfather

    rodfather LawnSite Fanatic
    Messages: 9,501

    Good answer...somebody isn't asleep at the switch!:D

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