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  1. #1
    New Member
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    Dec 2011
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    17
    Tractor
    john deere LX178 & LX277

    Default John Deere LX178 Noise?

    I have had this mower since new and has served me well, I cut about 2 acres of grass all summer and pick up leaves in fall with a jarco wagon and it works great without a power flow. My concern now is a noise, like a bearing or? I have taken the mower deck off, it does it when it idles but does not vary with engine speed. When I push on the brake peddle and lock it with the brake lock it quits and as soon as I release it and go, the noise is there. I do not think it is the engine bearing as it is a steady speed. If it were in the engine it would vary with the engine speed. Would like to get it fixed before spring and would like to do myself and not take to dealer. I have taken the seat, and frame cover off and I cannot pinpoint the noise. Anyone have any ideas? Thanks for the help

  2. #2
    Platinum Member
    Join Date
    Mar 2006
    Posts
    683
    Location
    BEECHER CITY, IL
    Tractor
    KIOTI DK45S

    Default Re: John Deere LX178 Noise?

    Possibly could be a bearing going bad in one of the transmission drive belt idler pulleys.
    ILLINOIS ENGINE, Beecher City, IL
    Briggs and Stratton MST (Master Service Technician)
    ILENGINE over at Lawnmowerforum

  3. #3
    New Member
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    Dec 2011
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    17
    Tractor
    john deere LX178 & LX277

    Default Re: John Deere LX178 Noise?

    Where is that located? Maybe on the transaxel? If I remember right there is just the main pully on the motor. Appreciate the help.

  4. #4
    Super Star Member
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    Aug 2001
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    12,099
    Location
    Upper Midwest USA
    Tractor
    JD 4300, JD X485 JD 4x2 Gator, JD 425, JD455

    Default Re: John Deere LX178 Noise?

    dreamen

    Shown here are the drive pulley's and idlers.

    I'd suggest letting it set and run for a length of time, like an hour.
    Then shut off and feel the bearings to see if one is hot to the touch. That should identify if it is a bearing in an idler or not.

    Also, if it seems to be brake related, look for some debris in the brake drum/ brake band area.
    Attached Thumbnails Attached Thumbnails -178lx_drive_system-jpg  

  5. #5
    New Member
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    Dec 2011
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    17
    Tractor
    john deere LX178 & LX277

    Default Re: John Deere LX178 Noise?

    Thanks will try that, I took off the seat and the green metal frame so I could see the pulley's cleaned out the plastic fan as it was full of dirt. When running I could not pinpoint the noise on the idler pulleys. Never thought of checking for heat. Will let you know what I find out. Have a Wonderful New Year!! Next project is the LX277 I just picked up, going to take the 178 to the cabin.

  6. #6
    New Member
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    Jan 2012
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    11
    Tractor
    John Deere 345

    Default Re: John Deere LX178 Noise?

    Use a mechanics stethoscope and listen to each of the pulleys by putting the tip of the scope on the bolt of the pulley while the engine is running. I found my bad pulley really quick with this method. Also, have you check the level of fluid in the trans?

    Mechanic's Stethoscope

  7. #7
    New Member
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    Dec 2011
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    Tractor
    john deere LX178 & LX277

    Default Re: John Deere LX178 Noise?

    Will give that a try, Thanks. I just do not believe it is a pully as I check each of them before. Was also thinking, isn't there a drive clutch? When I press the peddle and lock on the brake it quits. There must be a drive clutch that engages when I release the brake and then drive the tractor? That is my thought and fear as I think these are expensive?

  8. #8
    Super Star Member
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    Aug 2001
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    12,099
    Location
    Upper Midwest USA
    Tractor
    JD 4300, JD X485 JD 4x2 Gator, JD 425, JD455

    Default Re: John Deere LX178 Noise?

    I don't see a drive clutch (see posted pic of pulleys) as one pulley is on the engine and the other is on the tranny. The two idler pulleys are linked to your "clutch" pedal (that I think you have).
    Maybe something is vibrating (rattling noise) that is locked down when the brake is on.

  9. #9
    New Member
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    Jan 2012
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    John Deere 345

    Default Re: John Deere LX178 Noise?

    Quote Originally Posted by dreamen View Post
    Will give that a try, Thanks. I just do not believe it is a pully as I check each of them before. Was also thinking, isn't there a drive clutch? When I press the peddle and lock on the brake it quits. There must be a drive clutch that engages when I release the brake and then drive the tractor? That is my thought and fear as I think these are expensive?
    Even if it's not one of the pulleys, the Mechanic's Stethoscope should let you listen and pinpoint where the sound is coming from. Since you can make it go away by pushing the brake, it should make diagnosing with the Mechanic's Stethoscope easier, though it may take two people. Good luck and let us know what you find out.

  10. #10

    Default

    You can put a long screwdriver up to your ear also if you don't have the scope.

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