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jdemaris
09-28-2003 18:35:12
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Re: Re: JD 410B Backhoe Problem Posted 9/09/03 in reply to Chuck, 09-28-2003 08:06:55
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Can't tell you without having it where I can see it. I suggest you pull out any plugs and look at them, it can't hurt anything. A convertible plug will be solid steel with oil rings and backup washers, i.e. it won't have any internal parts. It's also possible, depending on the control valve, to find circuit relief valves. They are used to put a lower maximum working pressure on specific functions. You'll almost always find them on backhoe control valves. I don't know about the loader valve. All a loader has is pressure up and down, and curl up and down, right? So, it's possible it might have a circuit relief valve for one of those functions, I don't remember. A circuit relief vavle usually has it's preset working pressure stamped on it. Also, if you remove one, it won't be solid steel, i.e. it has internal parts and seals. Either way, convertible valve, or circuit relief valve, if the o-rings are blown, they will leak. Sorry I can't be more specific, but I haven't worked on a 410B for a long time.
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