A picture is worth a thousands words. And so is an accurate diagram. It can also be worth a lot of nickel. Consider the four main types of hydraulic diagrams in common use — and the consequences of having to manage a hydraulic machine without them:

Block Diagrams show the components of a hydraulic circuit as blocks joined by lines, … Read more

One of our readers wrote me about the following problem:

“I tried one afternoon and evening to determine what was wrong with a hydrostatic transmission by monitoring case drain flow. I was confused by the readings I was seeing. There was a flow meter in the transmission pump outlet and another in its case drain that always showed charge pump … Read more

I get all sorts of question from our members. And there’s a very valuable lesson contained in this one:

“We have some problems with a Parker-Denison hydrostatic transmission pump P24S 2R1C 9A2. Oil temperature rises from 20 to 50 Celsius within 15-20 minutes of only light operation (65 bar working pressure). The pump was sent to a local workshop for … Read more