In The Hydraulic Troubleshooting Handbook I lay out a step-by-step SYSTEM for reliable and efficient troubleshooting. But there’s another prerequisite you won’t find in the job description: the ability to educate and convince the most ardent skeptics of your diagnosis – usually engineers with limited hydraulics knowledge. This story, sent to me by Joachim Renner, one of our members from … Read more
Tag Archives: hydraulic cylinder repair
What To Do About Bent Hydraulic Cylinder Rods
In Chapter 13 of Insider Secrets to Hydraulics, I explain how to check the straightness of a hydraulic cylinder rod and calculate allowable run-out. This is an essential task when repairing any hydraulic cylinder. Because if a bent rod gets put back in, the life of the rod seal is compromised and the cost of the repair largely wasted.… Read more
Directional Valve Spool Configuration and Cylinder Drift
In response to my previous post about troubleshooting hydraulic cylinder drift, a couple of our members thought the influence of valve-spool configuration on cylinder drift warranted discussion. Charlie Field from Perry Slingsby Systems in the UK sent me this message:
“By far the most common reason for cylinder drift is the DCV controlling it. Closed to actuator spools almost … Read more