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Case Tractors Discussion Forum
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870 lift drops

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david

05-03-2004 18:47:07




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my little 870 3 point lift doesn't stay put at a idle it drops several inches then lifts back up continualy and as soon as you shut it off it drops all the way down, any thoughts?




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RoyG

05-04-2004 19:15:33




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 Re: 870 lift drops in reply to david, 05-03-2004 18:47:07  
You will need to check the adjustment on the lowering popet in the control valve, the starting adjustmeint is 3/4 inch of the screw sticking out of the popet to set on the ball. Also you may need to check the seat of the check ball. I have used a brass punch on this ball and give it a sharp tap to reseat it. however if it leaks down rather quick I would sooner think it is the lowering popet adjustment. Very seldon is there a problem with the piston in those tractors

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RoyG

05-04-2004 19:13:27




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 Re: 870 lift drops in reply to david, 05-03-2004 18:47:07  
You will need to check the adjustment on the lowering popet in the control valve, the staring adjustmeint is 3/4 inchof the screw sticking out of the popet to set on the ball. Also you may need to check the seat of the check ball. I have used a brass punch on this ball and give it a sharp tap to reseat it. however if it leaks down rather quick I would sooner think it is the lowering popet adjustment. Very seldon is there a problem with the piston in those tractors

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jb

05-04-2004 10:47:55




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 Re: 870 lift drops in reply to david, 05-03-2004 18:47:07  
You may have some broken rings on the rockshaft piston, or a scored-up cylinder.



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