How to Diagnose Leaks, Drift, and Uneven Movement in Hydraulic Cylinders

https://theshopmanual.valoradigest.com/posts/how-to-diagnose-leaks-drift-and-uneven-movement-in-hydraulic-cylinders

Start by checking for external leaks: look for pooling oil or wet spots on the cylinder body and connections under normal operation. For drift and uneven movement, isolate the cylinder from the load and cycle it through its full stroke while measuring travel speed with a stopwatch or sensor; any hesitation or speed variation indicates internal seal or valve issues. Listen for knocking or hissing sounds during extension and retraction, which often point to air in the system or worn piston rings.…