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  1. #11

    Default Re: Riding mower leaves grass uncut

    I am on my way out to mess with the mower this morning. I do believe the 1inch diff is not correct. It is equal on both sides of the blades. You rotate and its exactly the same on the other side. I am positive it is not a bent blade. As these are new out of the box and the older set I replaced did the exact same thing. The older set were highlift blades while these are mulching blades.

    I am going to double check spindles and such....

  2. #12
    Elite Member
    Join Date
    Oct 2004
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    2,923
    Location
    limerick pa lycoming county pa
    Tractor
    kubota bx23

    Default Re: Riding mower leaves grass uncut

    It might sound crazey are your blades on backwards? I'v seen it once on a friends mower
    I'v put the wrong twist in my jd312 and blades ran wrong way my daughter made a couple passes around the yard till I noticed it.

    tom
    If it ain't broke we will help you brake it
    If it is broke we will help you get it fixed!


    https://www.facebook.com/joseph.t.mussington

  3. #13
    Platinum Member bontai_Joe's Avatar
    Join Date
    Feb 2004
    Posts
    834
    Location
    northeast PA
    Tractor
    Deere 316 (Kohler) Deere 316 (Onan) Deere 210

    Default Re: Riding mower leaves grass uncut

    You mentioned that you replaced a spindle a while back after hitting a stump. Possible the sheet metal of the deck shell is bent, causing the spindle to be out of aligment. This can sometimes be fixed with CAREFUL use of a hammer and/or use of washers as shims to relevel the spindle. The fact that when you checked the blade tips at both ends and they were about 1" out of being in the same plane indicates to me that the new spindle is either tilted, or the blade isn't mounted correctly on the star as mentioned above. It's fixable, will just take a little patience and persuasion.
    If it's free, it's for me!!!!!

  4. #14
    Elite Member whistlepig's Avatar
    Join Date
    Jan 2009
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    4,260
    Location
    Preble County, Ohio
    Tractor
    Kubota B7800 with FEL

    Default Re: Riding mower leaves grass uncut

    If it's leaving a strip of grass it can only be these things:

    A blade is bent.
    A spindle is bent.
    The deck is bent.
    A pulley is slipping.
    A blade bolt is not tight.
    A mismatched blade.

    That's about everything going on under a mower deck. I have never bent a mower deck. I have bent several spindles and blades though.

  5. #15
    Elite Member zzvyb6's Avatar
    Join Date
    Dec 2006
    Posts
    2,637
    Location
    michigan
    Tractor
    jd 1070

    Default Re: Riding mower leaves grass uncut

    You should check to see if the blades are all turning the same way. If your belt is mis-routed, then a blade going the wrong way will drill a strip in your lawn. Someone may have also had a belt problem and found one that worked but not in the way it was intended. Oops. If so, then you are gonna need to have a new belt and it will definitely be a different length.
    There is no "I" in team, but there is a "Me" if you want to jumble it up a bit...

  6. #16
    Elite Member
    Join Date
    Apr 2000
    Posts
    3,676
    Location
    Grayson County, TX
    Tractor
    Kubota B2710

    Default Re: Riding mower leaves grass uncut

    Sounds to me like the deck got bent when the stump was hit. If the blades are not the same height at the point where they rotate to the middle, its probably because the spindle is not perfectly perpendicular in relation to the deck. It can probably be bent back, or you can use spacing washers on the spindle mounting bolts to align it.

    It is very easy to bend this lightweight deck.
    Alan L., TX
    South of Bugtussle
    North of Mustang
    On the banks of Buck Creek
    We don't rent pigs.

  7. #17

    Default Re: Riding mower leaves grass uncut

    Ok well I tried a new belt today and no help. I have inspected the pullies and none seem warn. I remeasured the blades at tip to tip in the center and the left vs right is 1 blade thickness 1/4" not 1" as I stated. Not sure where I got the 1 inch from. I did notice today after trying the new belt. The grass left uncut or barely touched is more pronounced in turns. Turning left the left blade seems to leave a 3-4" wide section towards the middle of the deck uncut or slightly touched.

    I have taken measurements of the blades to the ground all seem to be inline with the deck adjustment listed in the owners manual.

    So I am worn out from working in the garden today, I really didnt give too much effort to the rider. Will look tomorrow.

    Corey

  8. #18
    Super Member Scooby074's Avatar
    Join Date
    Aug 2006
    Posts
    6,040
    Location
    Nova Scotia
    Tractor
    BX 25, ZD 326

    Default Re: Riding mower leaves grass uncut

    Sure is a weird one.Is there any play in the spindles?

    Pics may help.

  9. #19
    Silver Member
    Join Date
    Jan 2009
    Posts
    124
    Location
    Loudon, New Hampshire
    Tractor
    Agco ST35

    Default Re: Riding mower leaves grass uncut

    Quote Originally Posted by fordmudduk View Post
    Ok well I tried a new belt today and no help. I have inspected the pullies and none seem warn. I remeasured the blades at tip to tip in the center and the left vs right is 1 blade thickness 1/4" not 1" as I stated. Not sure where I got the 1 inch from. I did notice today after trying the new belt. The grass left uncut or barely touched is more pronounced in turns. Turning left the left blade seems to leave a 3-4" wide section towards the middle of the deck uncut or slightly touched.

    I have taken measurements of the blades to the ground all seem to be inline with the deck adjustment listed in the owners manual.

    So I am worn out from working in the garden today, I really didnt give too much effort to the rider. Will look tomorrow.

    Corey
    Just a couple things to check.
    Verify that the blades are not upside-down. Most AYP replacement blades are stamped "grass side" to identify the correct position.

    Measure the width of the cut made by both blades; it should be very close to 42". Also check the clearance between the blade tips in the horizontal plane.(how far apart are the blades?)

    Check the level of the deck by positioning the blades front-to-rear and measuring the ground clearance while on a flat surface. All 4 blade tips should be within ¼".

  10. #20
    Veteran Member alchemysa's Avatar
    Join Date
    Oct 2006
    Posts
    1,285
    Location
    South Australia
    Tractor
    Kubota B1550HSD

    Default Re: Riding mower leaves grass uncut

    Quote Originally Posted by fordmudduk View Post
    The grass left uncut or barely touched is more pronounced in turns. Turning left the left blade seems to leave a 3-4" wide section towards the middle of the deck uncut or slightly touched.

    Corey
    Thats normal when one blade is set forward of the other (as they are in most mowers). It's designed that way so the cutting paths can overlap without the blades hitting each other. You'll get a bigger uncut line if you turn in the direction of the blade thats set further back. You'll have no line if you cut in the other direction.

    Anyway you shouldnt have an uncut strip when you cut in a straight line.

    If one blade is longer than the other put at the rear, it might make a difference. Make sure they are they are up the right way.
    Last edited by alchemysa; 06-25-2009 at 09:13 PM.

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