Sometime ago I was involved – in a supervisory capacity – in the planned change out of components on a hydraulic machine. The design of the machine’s hydraulic power unit was the all-too-common, cheap and nasty, everything mounted on the tank lid variety. You know the ones – electric motor mounted vertically, with pump submerged in the tank. They’re cheap … Read more
Tag Archives: hydraulics troubleshooting
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
What Happens When Hot Oil Meets a Cold Hydraulic Motor?
A recent client asked me to investigate and solve a recurring problem on a diving bell launch and recovery system. The system comprised a hydraulic power unit, a bell winch, an umbilical winch and a guide-wire winch.
To launch the bell, the guide-wire winch is used to lower a clump weight to the seabed. The guide wires prevent the bell … Read more