A repairer rebuilt a hydraulic piston pump. A week later it came back like a boomerang, the subject of a warranty claim. Upon tear down the piston retaining plate was found to be broken–see inset pic. Fearing the aftermarket parts they used were not up to scratch, the repair shop quietly accepted warranty and rebuilt the pump for a second … Read more
Tag Archives: hydraulic pump
When Hydraulics Terminology Stops Being Descriptive
There’s a lot of terminology in hydraulics. Some of it descriptive. Some of it misleading. Pressure Relief Valve. No confusion here. Directional Control Valve. Same. It says what it means and it means what is says. So let’s use this test: it says what it means and it means what is says, as the gold standard for descriptive terminology.
What … Read more
Hydraulic System Cavitation and Many of Its Causes
Cavitation is the term used to describe the formation of gas cavities within a liquid. In a hydraulic system, this is normally taken to mean formation of vapor bubbles within the oil. But it can also mean dissolved air coming out of solution in the oil.
Cavitation erosion occurs when gas cavities in the oil collapse (implode) under pressure, in … Read more