Session Listing

Here is a complete list of all the subjects we cover.

19 Electrical Sessions

Basic Electrical Concepts

Updated January, 20176 Materials

When studying electrical circuits, you need to start with the fundamentals: Voltage, Current, and Resistance.

Learn about: Current, Amps, Power, Resistance, Ohms, Voltage, Ohm's Law, and a whole lot more.


Updated January, 20174 Materials

Welcome to the session on electrical connectors.

Learn about: Deutsch, Coaxial, Soldering Iron, Metri-Pack, Solder Joint, Optical Fiber, Solder, and a whole lot more.


Updated January, 20174 Materials

Learn to use your multimeter to test a diode.

Learn about: Semiconductor, Multimeter, P-type, Circuit, Bias, Troubleshooting, Rectifier, and a whole lot more.

Electrical Hazards & Safety

Updated March, 20183 Materials

Even low voltage systems can seriously injure or even kill.

Learn about: Electrocution, Electrically Insulated Footwear, Electrical PPE, , Hazards, Flame Resistant, Zero Energy, and a whole lot more.

Electrical Measurements

Updated January, 20178 Materials

Digital Multimeters (DMM) are one of the most powerful tools available to electricians.

Learn about: Electrical, Voltage Test, Test For Blown Fuse, Current Test, Continuity Test, Voltmeter, Electrician, and a whole lot more.

Flow Sensors

Updated July, 20183 Materials

Both the electromagnetic flow meter and the mass flow meter measure flow without adding a turbine or a restriction to the mix.

Learn about: Electromagnetic Flow Meter, Mass Flow Rate, MFMS, Conductive, Mag Flow Meter, Electrodes, Magnetic Field, and a whole lot more.

Fuses & Circuit Breakers

Updated January, 20172 Materials

This mini-session gives you a quick overview of these critical circuit protection devices.

Learn about: Fuse, Testing Fuses, Fuse Test, Circuit breaker, Digital Multimeter, Blown Fuse, Short Circuit, and a whole lot more.

Interpreting Electrical Schematics

Updated January, 20174 Materials

Schematics don't need to be confusing.

Learn about: Earth Ground, IES, Diagram, Electronics, Schematic, Electrician, Wire Crossing, and a whole lot more.

Open & Short Circuit Faults

Updated January, 20176 Materials

In this session, you'll apply electrical principles to troubleshooting.

Learn about: Open Circuit, Digital Multimeter, Electrical Fault, Hydraulic Loader Fault, Electrician, Open Circuit Fault, Short Circuit Fault, and a whole lot more.

Position Sensors

Updated July, 20189 Materials

Inductive, Capacitive, Photoelectric and Ultrasonic proximity sensors are covered in this session.

Learn about: Inductive, Proximity, Photoelectric, Through-Beam, Capacitive, Retroreflective, Thru-Beam, and a whole lot more.

Pressure Sensors

Updated July, 201810 Materials

Pressure sensing can be done with one of several kinds of technologies.

Learn about: Pressure, psia, Gauge, Indicator Fluids, Bourdon Tube Gauge, Diaphragm Gauge, Variable Capacitance Sensor, and a whole lot more.


Updated February, 20176 Materials

Relays are demystified in this interactive lesson.

Learn about: Schematic Symbol, Relay, Diagnostic, Switch, System, Throw, Troubleshooting, and a whole lot more.


Updated January, 20173 Materials

Transistors are the focus of this session, plus you'll learn how to prevent damage to these sensitive components.

Learn about: JFET, Electrostatic Discharge, MOV, Semiconductor, Transistor, Troubleshooting, ESD, and a whole lot more.

Sensor Basics

Updated August, 201814 Materials

Sensors are everywhere in our electrical world.

Learn about: Zero, Sourcing, Upper Range Value, Calibration, Sinking, PNP, Live Zero, and a whole lot more.

Series & Parallel Circuit Basics

Updated May, 20188 Materials

Series and parallel circuits are at the heart of every electrical system.

Learn about: Electrical Circuit, System Design, Troubleshooting, Electrician, Series, Parallel, Branch, and a whole lot more.

Starting & Charging Systems

Updated January, 20173 Materials

Dig into mobile electrical circuits with this session on starting and charging systems.

Learn about: Starter, Equalizer, 12V, Alternator, Troubleshooting, Electrical, 24V, and a whole lot more.


Updated January, 201712 Materials

Switches are one of most common control elements used in electrical circuit design.

Learn about: Toggle, Rating, Normally Open, Throw, On-Off-On, Normally Closed, Double Pole, and a whole lot more.

Variable Resistors

Updated January, 20175 Materials

Potentiometers vs.

Learn about: AC temperature control, Potentiometer, Variable Resistor, wiper, Resistance, Rheostat, 2 lead, and a whole lot more.

Waveforms & Signal Generation

Updated January, 20177 Materials

Direct current is common in low voltage systems, but as soon as you start working with high voltage, you'll need to know about alternating current.

Learn about: ECM, PWM, Sin Wave, Duty Cycle, Hz, Electrical Current, Hertz, and a whole lot more.

22 Hydraulics Sessions

Counterbalance Valves

Updated January, 20175 Materials

Counterbalance valves allow raised loads to be lowered safely, with a minimum of wasted energy.

Learn about: Motion Control, Load Holding, Runaway Load, Adjusting a Counterbalance Valve, Counterbalance Valve, Raised Load, Safety, and a whole lot more.

Cross-Port Relief Valves

Updated January, 20175 Materials

Cross-port relief valves expand on the standard relief valve to control otherwise destructive pressures created by external forces acting against an actuator.

Learn about: Overpressure, Cross-Port Relief Valves, Braking Valves, Flywheel Mass, Regenerative, and a whole lot more.

Electro-Hydraulic Valves

Updated July, 20185 Materials

Enter the world of electro-hydraulic valves in this session.

Learn about: servo valves, proportional valves, electro-hydraulic valves, moog, and a whole lot more.

Fixed & Variable Displacement Pumps

Updated June, 201826 Materials

If you have questions about hydraulic pumps, this is the session for you.

Learn about: Piston Pump, Swash Plate, Rotor, Pressure Differential, GPM, Pressure, On-Stroke, and a whole lot more.

Flow & Directional Control Valves

Updated June, 201818 Materials

This session is absolutely packed with fun lessons and interactive animations.

Learn about: Port, Lands, Tandem, Flow Paths, Choke, Closed, Undercuts, and a whole lot more.

Fluid Power Basics

Updated January, 20177 Materials

If you're looking for the starting point in your study of hydraulics, this is it.

Learn about: Force Multiplication, Static Pressure, FPA Triangle, Flow Rate, Pressure, Force = Pressure x Area, Surface Area, and a whole lot more.

Hydraulic Accessories

Updated July, 201810 Materials

This session covers a handful of hydraulic accessories.

Learn about: Thread Gauge, Filtration, Thread Identification Kit, Metric Taper, Filters, Minimum Bend Radius, NPTF, and a whole lot more.

Hydraulic Actuators

Updated July, 201810 Materials

Linear and rotary actuators are the muscles of a hydraulic system.

Learn about: Rod, Gland, TSTP, Piston, Motor, Cylinder, Rotary Actuator, and a whole lot more.

Hydraulic Hazards & Safety

Updated January, 20173 Materials

Safe working habits around hydraulic systems save lives.

Learn about: Hose and Fitting Failure, Unexpected Motion, Pinch Points, Zero Energy State, System Adjustment Hazards, Safety, Flammability, and a whole lot more.

Hydraulic Schematic Symbols

Updated January, 20177 Materials

Schematic symbol reading is a vital troubleshooting skill.

Learn about: hydraulic pilot, tank, solenoid, orifice, pilot line, detent, electrical line, and a whole lot more.

Hydraulic Steering

Updated January, 20186 Materials

This session will go into detail on hydraulic power steering and how it works.

Learn about: power steering, Hand Metering Unit, hydraulic steering, HMU, steering valve, orbitrol, and a whole lot more.

Hydrostatic (Closed Loop) Systems

Updated July, 201814 Materials

Get right into the design of closed loop systems with colourful graphics and detailed drawings.

Learn about: Cross Port Relief, Reversing Flow, Charge Pump, Servo, Heat, Hydrostatic Loop, Cavitation, and a whole lot more.

Load Sensing Pumps

Updated January, 201711 Materials

This animated and interactive session takes the mystery out of load sense.

Learn about: Load Sense, LS, Piston Pump, Pressure Differential, Flow Control, Margin Pressure, Hunting, and a whole lot more.

Open & Closed Center Systems

Updated January, 201713 Materials

This session tackles the differences and similarities between open and closed center systems.

Learn about: Closed Loop, Sectional Valve Bank, Open Center, Closed Center, Open Loop, Mobile, and a whole lot more.

Parallel & Series Systems

Updated January, 201721 Materials

Parallel and Series circuits behave very differently.

Learn about: Branch, System Pressure, Parallel Circuits, Pressure Drops, Series Circuits, Load, Restriction, and a whole lot more.

Positive & Non-Positive Pumping

Updated May, 201821 Materials

Positive and Non-Positive Pumping tackles the differences between the two types of systems, and the design and maintenance needs of each.

Learn about: Non Positive Displacement, Charge Pump, Net Positive Suction Head, Aeration, Breather, Positive Displacement, Void Bubbles, and a whole lot more.

Pressure & Flow

Updated January, 201720 Materials

This session gets you started with a solid foundation on pressure and flow basics.

Learn about: Hydraulic Flow, Hydraulic Pressure, Flow Rate, Slippage, Gauge, FPA Triangle, Fluid Velocity, and a whole lot more.

Pressure Reducing Valves

Updated January, 20175 Materials

Pressure reducing valves function very differently than relief valves, even though their schematic symbols look very similar.

Learn about: Pressure, Normally Closed, Downstream Pressure, Pilot Operated, Direct Acting, Pressure Reducing Valve, and a whole lot more.

Pressure Relief Valves

Updated January, 201721 Materials

Jump into relief valves with this colorful session.

Learn about: relief valves, limit maximum system pressure, pilot, cracking pressure, pressure override, external pilot, setting pressure, and a whole lot more.

Sequence Valves

Updated January, 20175 Materials

Sequence valves are used on many machines to choreograph hydraulic functions.

Learn about: Training, Hydraulic, Set Pressure, Pressure, Valve, Sequence, Order, and a whole lot more.

Troubleshooting Processes

Updated January, 20177 Materials

Troubleshooting a hydraulic system can be a demanding and tricky task.

Learn about: Failure, Guess and Check, TSTP, Hit or Miss, easy-to-check order, Downtime, Ten Step Troubleshooting Process, and a whole lot more.

Unloading Valves

Updated January, 20176 Materials

Unloading valves are often confused with relief valves, but they play a unique role in hydraulic systems.

Learn about: High-Low Circuit, Fast Approach Slow Feed Circuit, Pressure Pump , Volume Pump, Energy Saving, Pressure, Balanced Relief Valve, and a whole lot more.

11 Machinery Sessions

Blast Hole Drills

Updated August, 20183 Materials

This session gets you right into the hydraulic circuit sections in a common blast hole drill.

Learn about: Hydraulic Circuit, Diverter, Brakes, Blast Hole Drill, Holdback, Animation, Propel, and a whole lot more.

Coal Stacker-Reclaimer

Updated June, 20182 Materials

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Learn about: , and a whole lot more.

Coiled Tubing Units

Updated April, 20183 Materials

This session is specific to coiled tubing units and problems related to injector chain tension and traction.

Learn about: coiled tubing, injector traction, hydraulic faults , chain tension, Coil tubing injector, and a whole lot more.

Excavators & Shovels

Updated July, 201825 Materials

In the world of excavators & shovels, there are a lot of specialized hydraulic components used to solve problems specific to such large mobile machinery.

Learn about: pump controller, pump regulator, heavy machinery, Electro-hydraulic control valve, solenoid valves, EHC Valve, and a whole lot more.

Hydraulic Governor

Updated April, 20182 Materials

The governor is a critical component in hydroelectric dams.

Learn about: hydroelectric, engine, governor, generation, electricity, hydraulic, dam, and a whole lot more.


Updated July, 20184 Materials

Get to know your way around the hydraulics on a loader with the advanced simulations in this sessions.

Learn about: Mobile Equipment Hydraulic, Shock Valve, Bucket, Steering, Tilt, Loader Schematic, Front-End Loader, and a whole lot more.

Oilfield Cementing

Updated May, 20181 Material

Oilfield cementing has driven industrial process technology to produce many specialized components, which you'll learn about in this session.

Learn about: Dry Blending, Oilfield, Diffuser, Cement Metering Valve, Mixing Head, Clumping, Dust, and a whole lot more.

Oilfield Pumping

Updated June, 20186 Materials

Reciprocating plunger pumps are very common in oilfield pumping.

Learn about: Reciprocating Plunger Pump, Packing, Maintenance, Quintuplex, High Pressure Pumping, Discharge Valve, Fluid End, and a whole lot more.

Pulp Bale Presses

Updated April, 20184 Materials

Compacting sheet pulp or loose pulp to a bale size that is optimal for shipping requires a massive hydraulic press.

Learn about: Pulp bale press, pulp and paper, and a whole lot more.

Rail Car Dumper

Updated June, 20181 Material

Learn through play about a pulp-chip rail car dumper.

Learn about: low pressure standby, Pulp and Paper, logic, slip-in cartridge, Car, Dumper, Rail, and a whole lot more.

Sawmill Conveyors

Updated April, 20181 Material

Sawmills are full of specialized hydraulic and electrical equipment.

Learn about: Conveyor, Sawmill, Belt, Quadrant Feeder, Log, Hydraulic, and a whole lot more.

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