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  1. #1
    Member
    Join Date
    Jun 2007
    Posts
    30
    Location
    Maine

    Default 3ph pin broken

    Anyone seen this before? I was using a box blade with a JD 4520 and heard a snap. Didn't notice anything obvious but when I lifted the box blade I noticed it was hanging at an angle. It seems that the lynch pin holding the lower arm of the 3ph to the tractor chassis had fallen off. The hitch arm had slid to the end of the pin and when tension was put on the pin during box blading, the pin broke right where the hole is for the lynch pin. The pin is probably 3/4" or 7/8" in diameter but snapped right in half. Thank god this piece is removable on my tractor ($102 to replace...yikes) and not part of the cast pieces that surround this mounting pin. I had a tough time getting the old pin out but was successful and I am waiting for the replacement. I guess I need to figure out something better to secure the 3ph arms onto the tractor. Maybe a bolt or cable tying the lynch pin.

    Gary

  2. #2
    Platinum Member
    Join Date
    Dec 2001
    Posts
    969
    Location
    Maryland

    Default Re: 3ph pin broken

    Those linch pins are handy to remove and install, but if you are running where there are lots of sticks or thick brush, they can get knocked off. If you usually don't remove te arms, a bolt with a lock nut or double nut jammed together might be a better solution for you. $102 is bad enough, but much better than replacing a casting.

  3. #3
    Veteran Member sunnyside360's Avatar
    Join Date
    Aug 2006
    Posts
    1,346
    Location
    Central PA
    Tractor
    JD 3720 Cab, JD 4320, Kubota M110X Cab, Kubota ZD331-72

    Default Re: 3ph pin broken

    The same pin came out on my 4320 while running the rotary cutter thru heavy/high brush but nothing broke (discovered it quickly). I replaced the lynch pin with small bolt and lock nut -- haven't had any trouble since.

  4. #4
    Silver Member
    Join Date
    Nov 2007
    Posts
    151
    Location
    NH
    Tractor
    JD 1520

    Default Re: 3ph pin broken

    Hey , all . you need a shorter lynch pin , the long one catches on the lift link when you lift the hitch all the way and causes it to break off at the hole. deere has a DETAC case on this issue.: my two cents.

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