uneven lift in stabilizers

[ron45]

I keep forgetting to ask about this. Sitting that the B.H. controls the right stabilizer will not raise the tractor enough to level it in some situations. It's has always been the weak side. Currently there are two low level leaks in the system. One probably originating in the stack valve area. The other where you make hose connection changes when replacing B.H. with the blade. Sorry I don't have the nomenclature for the area by dual break pedals.

Ron

 

[jaxs]

If it doen't leak down,you know ram cylinder isn't by-passing. Pump has enough pressure on opposite side so pump is ok. I would suspect an unloader valve needing adjustment. Putting a pressure guage on it should tell you if unloader is reliveing at too low psi. Take's about 5 minutes to stick guage in hose connection port. Ask dealer how much they charge if you bring it by next time you have hoe on trailer.

 

[VictorW]

Your slight leak in the valve block shouldn't cause your problem considering the tractor hyd pump flow rate. As jaxs mentioned and I assume, the cylinder will hold pressure. You just can't get the cylinder to handle the load when trying to raise the tractor. I had an odd/somewhat similar problem with one of my stabilizer valves. They are the inner two in the valve block assembly. My first test was to swap the hyd hoses between the two valves and have the control levers work the opposite cylinder. Then see if the problem now moved to the other stabilizer cylinder. This should tell you if it's the hyd cylinder or the actual controlling hyd valve block. If still the same as before, then the cylinder is leaking under the heavier load. If the problem has moved to the other stabilizer, then your problem is with the valve control block itself. There is no adjustment to an unloader valve on the valve blocks. There is a main pressure relief valve that controls all the blocks. Each valve block itself has pre-set load check valves that are controlled by springs for pressure. The spring could be weak or the sealing needle is not sealing with it's seat. These valves are used to hold the hyd fluid when the control is in its neutral position. That was the first part I replaced, by recommendation, but had no luck. Mine ended up being the actual casting of the valve block. The spool, the shaft that moves up and down within the block, wasn't sealing/mating properly with the valve block. I don't have any specs or know how or if there is a way to check the spring tensions of the springs controlling the load check valves. I'm sure a hydraulic shop could check it but I opted to just replace the block instead of paying a shop to diagnose the problem and then pay for parts.

 

[LD1]

For starters, even if the cylinder was bypassing (bad piston seals) it would not cause it to leak down.

So assuming the seals are fine because there is no drift is incorrect.

Now you mention that "in some situations" it won't level the tractor.

Is it possible you are just out of travel and the cylinder cannot go any further?

Or do you have the backhoe swing over to that side asking that cylinder to lift alot more than the other?

Are your rear tires loaded...asking it to lift that much more weight?

Not familiar with kioti models, but is this a TLB (industrial build type)....or is this a subframe add-on backhoe to a compact tractor?