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120 hitachi main valve issues

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    JOHN DEERE 490E ,690E, HITACHI 120,200 CROWD BOOM (STICK) PROBLEMS

    I have a john deere 490E the machine runs and functions good except for the stick in and out. if you bounce or surge it she'll take off and move. or a load of dirt already extended out a little. it'll go when activated. also digging if there pressure against boom she'll drag the machine. but if...
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