Z950M streaking grass
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Thread: Z950M streaking grass

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    Gus K's Avatar
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    Z950M streaking grass

    Hey guys, z950m 72” cut. It’s got 150hours. I just changed the blades and on the first cut noticed that it’s a little streak of grass about 4-6” wide that’s not getting cut the same height. This streak is just to the left side of the front wheel. Also, it is leaving a small clumping of grass down this streak when it cuts. It’s not scalping on one side or the other just a small streak of grass that’s cut just not the same height. I’ve looked under it, measured the deck height and even pulled the blades off and put them back. The only thing I noticed was a tab under the front of the deck that was slightly bent so I hammered it back up. Nothing really changed. I’ve thought of moving the blade on that side of the mower to another side just to see. It’s weird and I know it sounds weird. Just wondering if anyone has had the same problems.

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    coaltrain's Avatar
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    You need to verify is one blade is installed upside down. I know....that never happens...but has to the best of us.

    If that isn't the issue you need to accurately measure the length of each blade. Are these new blades OEM or aftermarket?

    When something like this happens you need to go back to the last thing that was done to the machine - which in your case is changing out the blades.
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    ~Stan~
    It is what it is
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    2520 w/200CX w/62D2

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    Gizmo2 (09-12-2018)

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    Gus K's Avatar
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    I’ve checked the placement of the blades twice because that would be a classic move I’d pulll, to put one upside down. Yesterday when I pulled the blades I measured each one against the old blades but not with a tape. Each blade end almost touches the next when I hand turn them.
    These were OEM blades from my JD dealer. I paid a little extra ( maybe $20 vs online prices ) for the convience of being able to drive 2 mins and pick them up and ensure I was getting the right blades.
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    coaltrain's Avatar
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    That is strange then.

    I know it’s all time consuming - but to further diagnose I would put the original blades on and see what happens. From what you said it cut fine until you changed the blades. Time to go back to what worked and see if it still works.

    Other stuff happening is just too coincidental for me - like the spindle in that side going bad and dragging - or the belt slipping only on that spindle - and that happening just when you happen to change the blades. 9 times out of 10 the answer is something really simple. It’s just a matter of finding it....
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    ~Stan~
    It is what it is
    Knowledge is power, ignorance is bliss
    2520 w/200CX w/62D2

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    Gus K's Avatar
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    Moved new blades around. Same. Changed to old blades. Same. I’ve included pics to show what it’s doing albeit it’s hard to see. Follow the red line. I’m pointing at where the streaking falls on the deck. It’s between the rear tire and the deck guide. I feel like if it was somethjng bent it would shake or scalp on a corner. Weird
    Attached Thumbnails Attached Thumbnails 5E935969-31EF-472E-900E-8ADB57F36FE7_1536779185612.jpeg   5D72C7B5-346B-4BF3-86B8-74BD294C18D7_1536779204324.jpeg  

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    coaltrain's Avatar
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    I know I’m not much help shooting in the dark like this....

    With all you have done so far my next step would be to remove the belt and check the spindle. But as I write this you would think if a spindle were bent there would be vibration like you said. Or if it were seizing up you would be getting a drag on the engine or a smoking belt.

    Just another shot in the dark - how are your tire pressures? One softer rear tire can skew the deck quite a bit. But that would give you an uneven cut - not a streak like you are getting.
    Last edited by coaltrain; 09-12-2018 at 04:19 PM.
    ~Stan~
    It is what it is
    Knowledge is power, ignorance is bliss
    2520 w/200CX w/62D2

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    Senior GTT Super Slacker Gizmo2's Avatar
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    Mulch kit?
    Keith

    JD 2320, 200CX FEL/61" bucket , 46 BH/16" bucket, Artillian Forks, 72" Snow Blade, Landscape Rake, Ballast Box, PHD,
    BX42 Chipper, XUV 560 Gator, Z915B ZTrak

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    Gus K's Avatar
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    No mulch kit.
    Random thought. My grass had gotten tall, been trying to get it cut back to height, I dunno. I ll check the air pressure.
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    coaltrain's Avatar
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    Fall grass is much tougher than spring grass - that could be the issue right there. Have you tried slowing down to see if it makes a clean cut? If it's really tall how about a second cut at an opposing direction?

    That blade on the left has the most work to do to get the clippings all the way over to the discharge.
    ~Stan~
    It is what it is
    Knowledge is power, ignorance is bliss
    2520 w/200CX w/62D2

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    Gus K's Avatar
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    Haven’t tried slower, only when the tall grass slows it. There are some ends that I double on and it did do better. Maybe the season and the missed cut has created this. I mean there’s no explanation!
    BigJim55 likes this.

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