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Tractor Talk Discussion Forum

Backhoe controls, wierd things happening

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Ed in Maine

06-19-2005 18:35:05




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To move the hoe bucket, you have to bump on another hyraulic lever to get the bucket lever to cause a reaction. i.e. I have to hold down on the bucket lever (nothing moves), but if I just barely put some tension on the boom lever, the bucket will curl right up. Does not have to be the boom, could just put tension on the swing pedal and that will cause it to curl. Is this a relief valve issue or an o-ring issue on the spool? The o-rings on the bucket are in the worst shape, won't even return to center from one directioin when I let go of it. It will return to center from the other direction though (the one that puts tension on the spring in the bottom of the spool). Any ideas? relief valves, o-rings, junk in the line? I replaced the filter and topped off the fluid, no change. Still has lots of power and digs good.

Case 310B construction king, 1959

Ed

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fallon in ct

01-17-2006 08:24:04




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 Re: Backhoe controls, wierd things happening in reply to Ed in Maine, 06-19-2005 18:35:05  
My 310 B had the exact problem. It turned out to be rust buildup in the bottom cups. Cleaned out cups, and it worked as advertised.



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old

06-19-2005 19:42:20




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 Re: Backhoe controls, wierd things happening in reply to Ed in Maine, 06-19-2005 18:35:05  
You probably have one valve that isn't staying in the home position. I have that at times on my OC-3 and my Galion 303 grader. One valve is just off center enough to keep the valve you are useing from working



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Ed in Maine

06-20-2005 16:30:13




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 Re: Backhoe controls, wierd things happening in reply to old, 06-19-2005 19:42:20  
That's what I was hoping. I will replace the o-rings and clean up the springs in the cups at the bottom. Hopefully that will at least make it better. I really don't want to tear apart each of the control sections unless I have to.

Thanks for the reply,
Ed



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