rScotty
Super Member
- Joined
- Apr 21, 2001
- Messages
- 8,258
- Location
- Rural mountains - Colorado
- Tractor
- Kubota M59, JD530, JD310SG. Restoring Yanmar YM165D
This problem just happened on our 2008 M59 with 340 easy hours. Most of it's use is to lend a hand moving dirt and rocks here on our mountain land.....along with plowing snow with the bucket in the winter. One operator, regular maintenance, and although it lives outside, it does get an old tarp draped over the operator's compartment when parked. All in all, I'd have to say it leads a pretty soft life for a construction type machine.
So far that's worked out well for both of us. But yesterday an odd thing happened with the backhoe swing. I was moving small rocks off the road with the bucket and thumb - light, easy work - and all of a sudden the boom just stopped swinging to the left. No noise, no warning and no load at the time. The swing just stopped working. It had just swung about half way to the right and then wouldn't come back left for nothing. With a little experimentation is turns out that it will swing to the right as nicely as always, but push the LH backhoe control lever control to the left to make the boom swing left and nothing happens at all. No change in engine RPM or anything. My first thought was that it had to be something simple. Probably just one of the connections between the hand lever and the BH valve rack had come loose. But the lever fells correct, and a quick look at the valve rack under that plastic cover shows nothing amiss there. Crawling underneath shows no leaks or damaged hoses. The hydraulic fluid is properly full.
After a little more experimentation it turns out that if the control lever is put in the left swing position a person on the ground can push the boom to the left fairly easily. So nothing is binding in the pivot or cylinder. All other backhoe movements - including the swing to the right - seem to work normally and with full power.
So does this mean the problem is in the valve? Somehow that just doesn't seem right when I can see that the control is working the valve slider normally and with what looks to be full motion....or at least I'm supposing it's moving full motion. Is there some sort of control or swing lever override that I'm overlooking? Has anyone else had this happen on a backhoe? What could it be?
Thanks, rScotty
So far that's worked out well for both of us. But yesterday an odd thing happened with the backhoe swing. I was moving small rocks off the road with the bucket and thumb - light, easy work - and all of a sudden the boom just stopped swinging to the left. No noise, no warning and no load at the time. The swing just stopped working. It had just swung about half way to the right and then wouldn't come back left for nothing. With a little experimentation is turns out that it will swing to the right as nicely as always, but push the LH backhoe control lever control to the left to make the boom swing left and nothing happens at all. No change in engine RPM or anything. My first thought was that it had to be something simple. Probably just one of the connections between the hand lever and the BH valve rack had come loose. But the lever fells correct, and a quick look at the valve rack under that plastic cover shows nothing amiss there. Crawling underneath shows no leaks or damaged hoses. The hydraulic fluid is properly full.
After a little more experimentation it turns out that if the control lever is put in the left swing position a person on the ground can push the boom to the left fairly easily. So nothing is binding in the pivot or cylinder. All other backhoe movements - including the swing to the right - seem to work normally and with full power.
So does this mean the problem is in the valve? Somehow that just doesn't seem right when I can see that the control is working the valve slider normally and with what looks to be full motion....or at least I'm supposing it's moving full motion. Is there some sort of control or swing lever override that I'm overlooking? Has anyone else had this happen on a backhoe? What could it be?
Thanks, rScotty