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
Tag Archives: hydraulic cylinder repair
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
How To Bench Test a Hydraulic Cylinder
In a previous post, I described the danger associated with the intensification of pressure in a double-acting hydraulic cylinder. In this post, I will explain how to use the intensification effect to test the integrity of the piston seal in a double-acting hydraulic cylinder. But before attempting this test procedure, it is absolutely essential that the danger associated with pressure … Read more