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  1. #1
    Bronze Member
    Join Date
    Apr 2008
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    87
    Tractor
    Mahinda 7520

    Default 7520 right front end noise

    Hey folks. Have a 7520 that has been making a subtle clunk periodically in the right front for the past 6 months or so. I greased everything and checked the oil in the front hubs, which was fine. It was pretty hard to hear, so I figured I'd wait until it got more prominent before trying to find it. The noise occurs once per wheel rotation and is not affected by 4 wheel vs 2wheel drive. Just the other day the noise became louder, more of a snap than a clunk, still with the same other characteristics. Seems to be present more when I have weight on the FEL. Definitely coming from the right front.

    I'm going to pull the hub cover plate and take a look, but wanted to see if anybody out there had experience with this and could give me some info on what to look for.

    Thanks Mahindra crew!
    Jon

  2. #2
    Bronze Member
    Join Date
    Nov 2013
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    73
    Location
    RI
    Tractor
    John Deere, Ariens, + more

    Default Re: 7520 right front end noise

    jack tractor up on that side and push on wheel let me know if you have play at pivot bearings?

  3. #3
    Bronze Member
    Join Date
    Apr 2008
    Posts
    87
    Tractor
    Mahinda 7520

    Default

    There is no play. I am checking like I would the ball joints on a car. Took the hub cover off and it looks good inside. Fluid is gray with a few tiny specks of metal but nothing unusual I think.

    I put the hub cover back on and use rtv sealant to seal it up. Hopefully that will be adequate. What oil should I use to refill it? 90W gear oil I assume?

    I'm thinking this is probably coming from the U-joint that sits just inside of the hub. Now the question becomes, if I need to replace that, how do I get to it? The hub and pivot bracket essentially surround the U-joint.
    Last edited by jrlogan; 11-18-2013 at 04:27 PM.

  4. #4
    Bronze Member
    Join Date
    Apr 2008
    Posts
    87
    Tractor
    Mahinda 7520

    Default Re: 7520 right front end noise

    So I'm 95% sure it's the U-Joint. When compared to the other side, I can notice slight play in the joint. The noise is still strangely intermittent. Silent sometimes, subtle others, loud occasionally. Assuming it is the U-joint, is there any harm in continuing to use it or should I replace it now? Don't want to damage anything further.

  5. #5
    Elite Member bindian's Avatar
    Join Date
    Feb 2007
    Posts
    4,509
    Location
    Willis, Texas
    Tractor
    Mahindra 6520 4WD

    Default Re: 7520 right front end noise

    When I changed my front hub and front axle oil, I used Shell 90w gear oil, the Spirax one I think. I'll have to look at the container when I get home.
    hugs, Brandi

  6. #6
    Silver Member
    Approved Advertiser

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    Nov 2002
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    284
    Location
    Bethany, CT
    Tractor
    Mahindra's

    Default Re: 7520 right front end noise

    By chance did you check the wheel bolts and lug bolts?

  7. #7
    Super Member
    Join Date
    Feb 2006
    Posts
    7,689
    Location
    VA
    Tractor
    JD2010, Kubota3450,2550, Mahindra 7520 w FEL w Skid Steer QC w/Tilt Tatch, & BH, BX1500

    Default Re: 7520 right front end noise

    Quote Originally Posted by jrlogan View Post
    There is no play. I am checking like I would the ball joints on a car. Took the hub cover off and it looks good inside. Fluid is gray with a few tiny specks of metal but nothing unusual I think.

    I put the hub cover back on and use rtv sealant to seal it up. Hopefully that will be adequate. What oil should I use to refill it? 90W gear oil I assume?

    I'm thinking this is probably coming from the U-joint that sits just inside of the hub. Now the question becomes, if I need to replace that, how do I get to it? The hub and pivot bracket essentially surround the U-joint.
    Quote Originally Posted by jrlogan View Post
    So I'm 95% sure it's the U-Joint. When compared to the other side, I can notice slight play in the joint. The noise is still strangely intermittent. Silent sometimes, subtle others, loud occasionally. Assuming it is the U-joint, is there any harm in continuing to use it or should I replace it now? Don't want to damage anything further.
    That u joint spins several times faster than the wheel. 1 clunk/wheel rev doesnt fit. To dissassemble you have to remove the ball jpiont plates top and bottom and then pull the hub and ujoint attached shaft out of the pumpkin. This will let you work on the [double] u joint.
    larry
    This side of 40
    JD2010, Kubota L3450/FEL w SK QC, L2550 w FEL
    Mahindra 7520 [Pinky] /FEL w Skid Steer QC/w Tilt Tatch & BH, BX1500 [Mighty Mouse]
    IH37 Baler, CCM165 Drum Mower, JD Rake
    JD 127 bushog, Flail, SK Tilt Tatch , KK tiller, Rhino rear blade, Post driver, post auger, chipper, pallet fork, Grapple/Loader Buddy, Homemade Splitter/DC Welder

  8. #8
    Bronze Member rustyjeep's Avatar
    Join Date
    Aug 2006
    Posts
    62
    Location
    Jessieville,Arkansas
    Tractor
    IH 484,IH 424,Mahindra 7520 4wd

    Default Re: 7520 right front end noise

    Double check the lug nuts and the outer wheel nuts.Mine was doing almost the same thing.My wheel was moving slightly behind the lug nuts.It sounded just like gear noise,tightened with a long cheater pipe fixed the noise.Look at the wheel and see if there is any blackish/grey color around the lug nuts. If so I bet it's your problem.
    Mahindra ,7520, 4WD

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