Adding auxiliary hydraulics to a 310C backhoe for a Okada hammer, please help

   / Adding auxiliary hydraulics to a 310C backhoe for a Okada hammer, please help #21  
having just purchased a 310c i to am looking how to get some auxiliary hydraulics on it for a thumb/tree shear/grabber type attachment. i have an electric foot switch and hydraulic quick disconnects on the boom but nothing seems to do anything, there is a valve type thing under the machine that has a sylinoid on it that clicks when i activate the electric foot switch but can not seem to get any hydraulic flow or pressure from the fittings. thanks for any response/help

On mine - a 310SG - there is a rocker switch on the instrument panel that has to be positioned to activate the auxillary hydraulic flow. It also has the foot switch and hydraulic quick disconnects on the boom.

Your aux hydraulics will either be one-way or two-way type. Mine was One-way type for things like a breaker or drill. Two-way is what is required to operate a thumb or anything that goes both ways.
Converting a one way to a two way requires adding an extra valve to the valve stack and of course longer bolts. It's about a two day job. At our local JD shop they told me that is about $3000 plus the cost of the valve. Then welding on a thumb is about that much more again.

I found out this stuff because I was curious about putting a thumb on the used 310SG we own. Knew nothing about the history of the tractor, so I went to the local JD industrial shop and talked to the shop foreman. From the serial number he pulled up a complete history of my machine from the way it was configured when sold and including all service done while under warranty. Even made me a copy. I wonder if you could have him do that for yours?
rScotty
 
   / Adding auxiliary hydraulics to a 310C backhoe for a Okada hammer, please help #22  
I致e got a 310j that I intend on putting a thumb on. I壇 planned on using a 12 volt diverter commonly used for grapples on tractors except I was going to use the flow from one the stabilizers so I have full control of the boom and thumb at the same time.

I didn't think getting two-way flow by using a diverter that way. It's two way control that is needed for a thumb all right. That's another way of getting two way flow. There must be others.

One way to get two way flow is to have the dealer add another valve to my valve stack for $3 to 4K. Frankly that sounds like the dealer gets to have all the fun.

Or....For a hoe that already have JD's standard one-way auxillary flow with the foot switch and quick connects(for breakers and drills) - there's another way that should work for two-way control. I don't see any reason why one couldn't simply put another loader valve in series with that one-way system so that when the one way flow is actuated it goes to a standard two way directional control valve....or for that matter the flow could go to a whole bank of secondry valves. 25GPM is a lot of flow. Anyone got any thoughts on this?

But back to your using a 12 volt diverter.... I'm assuming that the diverter would be one that when triggered one way would lock the outrigger so that you could maintain outrigger position, and at the same time divert that outrigger valve flow to a hydraulic thumb. When triggered the other way the diverter would work vise-versa, locking the thumb and enabling the outrigger... Hmmm.... I don't see any immediate reason that wouldn't work. It's almost too simple. Do people do that? Has anyone seen it done? Do you have a particular 12 volt diverter in mind to try?
rScotty
 

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