A question I’m asked regularly is “What is the best way to test the integrity of the piston seal in a double-acting hydraulic cylinder?”
There is a simple bench-test for doing this but it involves the intensification of pressure in the cylinder. While the test procedure is safe if you understand the concept of intensification in a hydraulic cylinder – it is inherently dangerous if you don’t. In this post I will explain the dangers of intensification in a double-acting cylinder and in my next post I will explain the test procedure.
Force produced by a hydraulic cylinder is a … continue reading »
Troubleshooting is an inferential process. So to become an effective troubleshooter, you must have a solid PROCESS. But you also need relevant KNOWLEDGE. Consider the old Indian Monkey Trap, for example:
The trap consists of a hollowed-out coconut chained to a stake. The coconut contains rice which can be accessed through a hole in the coconut’s shell. The hole is just big enough to allow the monkey to get its hand in, but too small for the monkey’s clenched fist, full of rice, to come out.
The monkey reaches in, grabs a handful of rice and finds himself trapped. The … continue reading »
In a previous blog post I discussed the true cost of hydraulic oil leaks. In the case of oil leaks, the cost areas that need to be considered include:
Contaminant ingress; and
But what about hydraulics’ fluid power cousin – pneumatics? One of the advantages that pneumatics has over hydraulics is its clean-ness. Air leaks are much easier to ignore than oil leaks because they don’t draw attention to themselves in the same way. You don’t need to worry yourself with clean-up and disposal costs. Contaminant ingression is possible, but is generally not a major … continue reading »