Fluid Power Journal

Coil Lifting Circuit on a Rolling Mill Will Not Lower the Coil

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training. A steel mill that takes large coils of …

Mobile Machines for Every Job

By Ben Dupre, Senior Technical Writer, HydraForce / Bosch Rexroth Compact Hydraulics. Mobile machines serve every function in construction, agriculture, …

Foam Injection Machine Overheats

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training. Many people don’t quite understand “Slip in …

Simple Cylinder Circuit Starts To Overheat When the Directional Valve Was Changed

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training. The circuit shown worked well for 6 months and …

Pump Continues To Fail After the Main Directional Valve Was Replaced Weeks Earlier

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training.   A manufacturer had a machine where the …

Overheating Problem on a Sand Core Production Machine

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training. Back in 2016, I wrote up a problem on a machine …

Figure It Out: Ram Drifts Down After Replacing the Main Directional Valve

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training. A company that makes carbon fiber leaf springs …

Proportional Valve With Spool Feedback Oscillates Badly on Start-up

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training. A dam out west had a hydraulic system installed …

Figure It Out: Loud Noise Heard When Shutting Off a Hydraulic System

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training The attached circuit for a guillotine type press …

Figure It Out: New Motor Stalls and Pops Overloads

A system that worked well for many years needed its electric motor changed. The company bought a 40-horsepower electric motor, but it was a different brand …