Downloads & Tools

Hydraulic System Troubleshooting and Maintenance

hydraulic-system-troubleshootingHydraulic System Troubleshooting Guide – This comprehensive and easy to use guide for troubleshooting hydraulic systems offers both a condensed and expanded set of tables that show “trouble” – “cause” – “remedy”. Please note that while this guide addresses many common problems, causes and remedies, some hydraulic system issues are more complicated and may require expert diagnosis. Hydraulic System Troubleshooting Guide.pdf (247KB)

hydraulic-system-install-and-maintenanceHydraulic System Initial Start-UP and Maintenance – This four page guide outlines basic hydraulic system start-up and maintenance tasks in paragraph and table formats. Please note that many systems operate in environments or contain components that have other maintenance and/or start-up requirements.  Hydraulic System Initial Start-Up and Maintenance.pdf (62KB)

electric-motor-troubleshooting-guideElectric Motor Troubleshooting Guide – This 16 page guide includes an extensive list of start connection diagrams and “trouble” – “cause” – “cure” charts. The guide also includes a troubleshooting section on AC motors used with variable speed drives and brake motors. Electric Motor Troubleshooting (Polyphase).pdf (851KB)


Interactive Engineering Downloads

convert-conversion-software“Convert” conversion software – Convert is a free unit conversion application from This powerful software allows you to convert many units including distance, temperature, volume, time, speed, mass, power, density, pressure, energy and more. The application also allows you to create your own custom conversions.  convertsetup.exe (780KB)

hose-pressure-drop-calculatorHose Pressure Drop Calculator – This handy hose pressure drop calculator takes the manual work out of calculating your application’s pressure drops. The Excel format spreadsheet allows you to customize your fluid and system specifications and allows for up to three sections of hose to be calculated in the same circuit.  hose drop calculator.xls (26KB)

ross-controls-pneumatic-sizingRoss Controls Pneumatic Valve Sizing Calculator – This Excel spreadsheet has four sheets of pneumatic formulas including, valve sizing for cylinder applications, valve sizing for motor applications, cfm to scfm conversion and total cv calculation. ross-controls-pneumatic-sizing-calcs.xls (88KB)

Hydraulic Reference Tools


Linde Conversion / Formula Chart – This collection of the most common fluid power unit conversions and formulas is a great tool for novice and expert alike.  Unit conversions are listed in both directions for quick reference. Formulas include those commonly used for cylinders, hydraulic pumps and motors, and vehicle sizing.  Linde Conversion Formula Chart.pdf (90KB)

sun-hydraulics-orifice-pressure-drop-chartsOrifice Pressure Drop Chart – This page from Sun Hydraulics’ cartridge valve catalog charts an orifices pressure drop from 0 to 100 GPM with orifices from 1/64 of an inch to 1 inch. The page also explains the formula used to calculate orifice pressure drops.  Sun Orifice Pressure Drop Charts.pdf (14KB)