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 pressure intensification in a hydraulic cylinder … Read more
I was recently engaged by a client to conduct failure analysis on a large (and expensive) hydraulic cylinder off an excavator. This hydraulic cylinder had been changed-out due to leaking rod seals after achieving only half of its expected service life.
Inspection revealed that apart from the rod seals, which had failed as a result of ‘dieseling’, the other parts … Read more
Some time ago I recorded a simulation video which explains what happens when the piston-seal on a double-acting cylinder leaks, and it becomes a displacement cylinder.
After watching the video, Larry from Canada sent me this in response:
“I enjoyed your video about cylinder drift not being caused by oil leaking past the seals. But I have to ask the … Read more