2630 Rear Hydraulics

Turns out the BH is a custom job, not even a John Deer.



Looks like a custom box to connect the hoses. You can just see a connector behind the post which is a needle valve adjustment of some sort.



The other end of the hoses connect to the standard break away coupler. Left connector is where the leak was suppose to be but beside being wet with oil, no sign of drips. So at this time will just leave it alone.



Not exactly sure what they used for the subframe. Do know it was modified at the BH end to add height so it would catch the top two mounting bolts of the BH.



The tag on the frame which you can see in the above pic just in front of the wheel doesn't clarify what it was originally intended to be used as.



So after looking at the BH some more to better understand it's setup, it was time to get it running. Voltage check of the batteries showed they were weak so I had to pull my truck in through the wet red clay and squeeze it between a trailer and the BH bucket to get close enough. With the jump start, she fired right up and smooothed out immediately which was nice being that it was still 35*. After moving the truck out of the way, started checking out the FEL. Except for the raise/lower hoses being swapped for some reason, everything worked as expected. With the hoses swapped though, float position is on the raise side and it's confusing to operate so I'll have to get that sorted out. Only thing I noticed was that the FEL wouldn't pick up the front tires off the ground but I didn't push the issue. Went to the BH end and figured out that to engage the BH have to push the remote hydraulic level to the back and hold it in place with a bungie coord. Checked for the leak at the BH couple and was pleasantly surprised for there not to be one. Everything on the BH worked as expected. The stabilizer legs will lift the tractor off the ground, but the bucket wouldn't. Next was the fun of moving the tractor which supposedly didn't have any brakes. Started rolling, hit the brakes and stopped. Tried again a little faster with the same results. So off to the front where I wanted to fix a soft spot in the parking area. The BH dug, the FEL scooped the dirt, and the brakes are strong enough to lock up a wheel. Did notice that it is low on hydraulic fluid as certain hydraulic functions were jumpy, but that is an easy fix. The other is the hydraulic pressure seems to be on the low side. I know that is adjustable at the pump and since the pump is new, doubt it has ever been set.

So my questions now are:
1) Just standard hydraulic fluid?

2) How do I adjust the pressure at the pump and can this be done without a gauge? My thought was to increase the pressure just enough so the FEL will pick up the front tires off the ground. If I must have a gauge, which gauge and where to connect it?

Over all it was a very good day!

That is a nice setup. My first thought was why didn't the person who installed the backhoe take a couple minutes to remove the 3pt arms. Obvious that backhoe is not coming off on a regular basis.

So everything works. That is good. You didn't check the hydraulic oil dipstick before running it and assuming it is low by the way functions acted? May or may not be true. Being the pump is new you would have to wonder if that really was the issue. Sounds like tractor needs to be gone thoroughly so you are familiar with it including a drain and refill of fluids and filters and a cleaning of the hydraulic screen. The only oil I recommend for that tractor would JD Hydraulic oil.

Check your Hydraulic oil and you will want to plug a gauge into the SCV (where backhoe plugs into tractor) and check pressure using a 2500 psi gauge min. Others here will confirm pressure which I should have memorized by now.

Do you know why the pump was replaced? I would get as much back information as possible because I'm thinking there could be a lot going on here with issues.