Figure It Out
By Robert Sheaf
CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training
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 …
Figure It Out: Relocating HPU Causes Start-up Problem
New Problem Relocating HPU Causes Start-up Problem By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial …
Figure It Out: Cargo Ship’s Cylinders Drifted
New Problem Cargo Ship’s Cylinders Drifted By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training. …
Figure It Out: Extractor Motor Reverse Speed Rises to an Unexpected Creep
By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training A hydraulic system drives a vertical ball screw …
Figure It Out: Deep Pan Forming Press Loses Operating Pressure
By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training A manufacturer of cooking pots and pans had a …
Figure It Out: Hydraulic Motor Slows as Accumulator Discharges
By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training A new system was required to run a hydraulic …
Shaft Seal Failed on New Pump
In the basement of a paper mill, a hydraulic power unit supplies all the flow and pressure needed to run one section of the mill. This section applies pressure …
Emergency System Fails to Close Safety Doors
A local repair shop was asked to troubleshoot a problem on the hydraulic system that closes a watertight door on a floating casino. The circuit was designed …
Figure It Out: Drifting Cylinder in a Rolling Mill
By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training A local repair shop was asked to troubleshoot a …
Valve Flaw Leads to Faulty Pressures
The circuit below was working for several years when the pressure-reducing valve on the clamp cylinder started leaking oil into an assembly bolt cavity. It …
Regenerative Circuit Drops Out
A specialty machine builder was having problems getting a vertical cylinder with a regenerative circuit to lift a hinged member. When the hinged member was …
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