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I still don't fully understand how drift works when a cylinder is bypassing (internally leaking).
According to an explanation here “when a load is hanging on a double-acting cylinder…the volume of pressurized fluid on the rod side can be easily accommodated on the piston side. But as the cylinder creeps a vacuum will develop on the piston side – once again due to the unequal volumes – and depending on the weight of the load, this vacuum may eventually result in equilibrium that arrests further creep.”
In my case an empty bucket will drift from the fully curled position to the dump position without reaching equilibrium. Can the cause of drift still be an internal cylinder leak?
I thought of that after I posted. Is there anyway to tell which one is bypassing without rebuilding both of them?
If one cylinder was bypassing, wouldn't the other cylinder be able to hold the empty bucket in the curled position? What's the likelihood that both cylinders would start bypassing at the same time?
Thanks for the reply. I'll try topping off the hydraulic tank. If if were low or foaming fluid, wouldn't I have loss of power to the loader as they run off the same pump? Below is the exploded parts diagram.
I want to clarify something from my original post. There is no mechanical connection between the steering wheel and the wheels. Since I am still able to steer, I assume the steering pump referred to as a “hydraulic steering wheel assembly” in parts diagram is functioning properly. In addition the steering cylinder must also be working properly. If my assumptions are correct, does this mean the priority valve (called the “one-way stable distributing valve” in the parts diagram) is defective? Am I on the right track? I'll try to scan and post the exploded parts diagram later today.
Hi Tommy,
The tractor is a Luzhong TC254. I don't think there are many Luzhong tractors sold in this country, but is seems to be very similar to the Jinma.
I remember learning in chemistry class that glass was a supercooled solution. Old church window being thicker on the bottom were always used as an example of how glass flows over time. In fact, glass is an amorphous solid that doesn't flow. Variations in thickness of glass were a result of the manufacturing process. The thicker end would be placed at the bottom for stability. Modern manufacturing processes result in glass with a uniform thickness. Studies using sensitive measuring equipment show no change in thickness over time. If there are any chemists out there please correct me if I'm wrong.
