If anybody feels like there are copyright issues, do contact me, and we shall deal with it.
Gear Pump Displacement Calculator - an App that I wrote to make my life easier. It calculates external gear pump displacement and allows you do download the data in a nice pdf file. More about gear pump displacement calculation here.
Interactive Standard O-ring Size Table
Cylinder Mounted Pilot-to-Open Check Valve Interactive Pressure Chart
Interactive Nomogram for Sizing Hydraulic Hoses
Maximum Pressure Calculator for Steel Pipes and Cylinder Tubes
Basic Module - a very nice basic hydraulics course
Facts, worth knowing about hydraulics from Danfoss
Fluid Power Grafic Symbols
Rexroth Axial Piston Units Training Course
Hydraulics Hints And Troubleshooting Guide
Gear Pumps Analysis and Troubleshooting
Logical Troubleshooting in Hydraulic Systmes
Lubricants and Hydraulic Fluids
Hydraulic Filtration - The handbook of hydraulic filtration
The Micron Rating for Media in Fluid Filters