I spent last Saturday afternoon sweating in the garden – which I have to admit, was much neglected by me over the winter, and so well overdue for some TLC. Spring has well and truly sprung here in the southern hemisphere and summer is just around the corner. The flipside of this is, for our many members in the northern hemisphere, it’s now fall with winter rapidly approaching.
A change in season often gives us pause for reflection – in many different ways. Years ago when working in the hydraulic repair business, we’d look forward to the summer as our … continue reading »
In my free email series, on YouTube and in exhaustive detail in The Hydraulic Troubleshooting Handbook, I explain the concept of how a double-acting cylinder becomes a displacement cylinder if the piston seal leaks. And as part of the explanation of this concept I state: “…if the piston seal is completely removed from a double-acting cylinder, and its ports are blocked, it will hold its load indefinitely unless the rod seal leaks.” And this is precisely how a ram, which has NO piston seal, supports a load.
But for the physics involved to apply (and the above statement to … continue reading »
A hydraulic machine has lots of moving parts to maintain. In fact, a hydraulic system is one of the most complex systems to maintain effectively. And here’s one more item to add to the list: the machine’s drawings. A machine’s hydraulic (and electrical) schematic diagrams don’t wear out, but they do tend to become inaccurate over time.
Even absent a major refit or redesign, it is not unusual for minor changes to be made to the hydraulic circuit over the course of the machine’s life. This could involve: change in make or model of components; additional filtration-or a reduction in … continue reading »