Figure It Out
By Robert Sheaf
CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training
System Cannot Reach the Needed Relief Setting
By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training A very simple power unit was having trouble …
A Rolling Steel Mill Had Trouble With the Roll Removal Circuit Trying To Eject a Roll
By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training. The circuit attached shows the hydraulic system …
Multi Pressure Press Pump Exploded
By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training The attached circuit on an older 75-ton press …
Evaluating a Customer’s Circuit Before Trouble Shooting
By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training. I have been teaching hydraulics since 1980 and …
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 …
Figure It Out: Press Upgrade Didn’t Fix Overheating Problem
By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training The above circuit drawing for a hydraulic …
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