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  1. #1
    New Member
    Join Date
    Apr 2012
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    1
    Location
    WI
    Tractor
    John deere

    Default John Deere 720

    I have John Deere 720 that blows smoke out of the oil cap on the side of the tractor and there seems to be alot of pressure there. I tried a to put a breather on it but it didn't seem to help. Is there any ideas that I could use and try to fix it.

  2. #2
    Member veto56's Avatar
    Join Date
    Mar 2012
    Posts
    30
    Location
    New Hope,ms
    Tractor
    john deere 720-1030-2250-4050 honda 4x4

    Default Re: John Deere 720

    Well all you can do is a breather cap which you did.You are having blow by must likely one of your valves isn't seating right.Most likely u have carbon build up.you could try a oil additive to the oil that helps clean the engine.other then that you have to do a compression test to see which cylinder has less.

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