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 …
New Problem: Pilot Operated Directional Valve Locks Up
I got a call to help with a problem on an aluminum uncoiling station. The customer would collapse the expander that held the coil and installed a new coil to …
New Problem Servo System Pump Keeps Failing
By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM CFC Industrial Training A company that manufactures plastic bottles for …
System Overheats on Custom Drum Crusher
By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM CFC Industrial Training A horizontal press crushes empty 30- and …
Pusher Cylinders Stop Midway
By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training The maintenance department of a large recycling …
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