Session Listing

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

20 Electrical Sessions

Basic Electrical Concepts

Updated March, 20184 Materials

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

Learn about: Watts, Energy Conversion, Ohm's Law, Work, Ohms, Current, Voltage, and a whole lot more.


Updated December, 20185 Materials

Ready to learn about the CAN Bus Protocol.

Learn about: Cyclic Redundancy Check Field, Network, NRZI, Node, CAN-L, Message Frame, Control Field, and a whole lot more.


Updated January, 20174 Materials

Welcome to the session on electrical connectors.

Learn about: Optical Fiber, Weather Pack, Deutsch, Data, Pin/Plug, Control, Plug, and a whole lot more.


Updated August, 20184 Materials

Learn to use your multimeter to test a diode.

Learn about: N-type, Flyback, P-type, Circuit, PNP, Electrical, NPN, and a whole lot more.

Electrical Hazards & Safety

Updated March, 20183 Materials

Even low voltage systems can seriously injure or even kill.

Learn about: Static Dissipative Footwear, Electrically Insulated Footwear, Electrocution, Electrical Safety, , Burn, Flame Resistant, and a whole lot more.

Electrical Measurements

Updated January, 20174 Materials

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

Learn about: DMM, Digital Multimeter, Short Circuit, Fluke Meter, Resistance Test, Measurement, Ammeter, 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, , Conductive, Density, Rate, Mass Flow Measuring System, Mass Flow Rate, 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, Digital Multimeter, Circuit breaker, Slow blow fuse, Fast acting fuse, Testing Fuses, Inspecting Fuses, and a whole lot more.

Interpreting Electrical Schematics

Updated January, 20174 Materials

Schematics don't need to be confusing.

Learn about: Wire Crossing, Off-Page, Signal Ground, Draft, Tag, Layout, Standard, and a whole lot more.

Open & Short Circuit Faults

Updated January, 20175 Materials

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

Learn about: Digital Multimeter, Open Circuit, Ten Step Troubleshooting Process, Short Circuit, Open Circuit Fault, Hydraulic Loader Fault, System Diagnosis, 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: Retroreflective, Thru-Beam, Photoelectric, Diffuse, Proximity, Capacitive, Nominal Range, 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: Gauge Pressure, Indicator Fluids, Manometer, Pressure, Wheatstone Bridge, Gauge, Differential, and a whole lot more.


Updated September, 20187 Materials

Relays are demystified in this interactive lesson.

Learn about: Electrical Circuit, Diagnostic, Troubleshooting, Switch, Pole, Single Pole Double Throw, Schematic Symbol, 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: Component, JFET, Semiconductor, MOV, Metal Oxide Varistor, Electronics, Maintenance, and a whole lot more.

Sensor Basics

Updated August, 201814 Materials

Sensors are everywhere in our electrical world.

Learn about: Transmitter, PNP, Live Zero, Lower Range Value, Zero, Span, Transducer, and a whole lot more.

Series & Parallel Circuit Basics

Updated January, 20198 Materials

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

Learn about: Kirchoff's Voltage Law, Branch, Series, Parallel, Electrician, KVL, Troubleshooting, 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: Alternator, Battery, 24V, Starter, Electrical, Troubleshooting, 12V, and a whole lot more.


Updated January, 201712 Materials

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

Learn about: Control, Selector, 3 Way Switching, Switch, N.O., Double Pole, N.C., and a whole lot more.

Variable Resistors

Updated January, 20175 Materials

Potentiometers vs.

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

Waveforms & Signal Generation

Updated October, 20188 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: Pulse Width Modulation, Digital Control, Frequency, Analog Control, Resistance, Hertz, Voltage, and a whole lot more.

23 Hydraulics Sessions

Cartridge Valves

Updated December, 20184 Materials

In this session you'll find an in-depth introduction to slip-in cartridge valves.

Learn about: two-port slip-in cartridge valves, logic valve circuits, damping valves, hydraulics, relief valves, check valves, area ratio, and a whole lot more.

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, Adjusting a Counterbalance Valve, Safety, Counterbalance Valve, Raised Load, Runaway Load, Load Holding, 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: Regenerative, Flywheel Mass, Cross-Port Relief Valves, Braking Valves, Overpressure, and a whole lot more.

Electro-Hydraulic Valves

Updated July, 20185 Materials

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

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

Fixed & Variable Displacement Pumps

Updated March, 201925 Materials

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

Learn about: Piston Pump, Swash Plate, GPM, Volumetric Efficiency, Pressure Differential, Variable Displacement, LPM, and a whole lot more.

Flow & Directional Control Valves

Updated February, 201919 Materials

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

Learn about: TSTP, Port, Main Valve Section, Operator, Closed, Valve Stack, Choke, and a whole lot more.

Fluid Power Basics

Updated September, 20188 Materials

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

Learn about: FPA Triangle, Viscosity, Turbulent Flow, Litres Per Minute, Force Multiplication, lpm, Gravity, and a whole lot more.

Hydraulic Accessories

Updated July, 201810 Materials

This session covers a handful of hydraulic accessories.

Learn about: Crest, Complete Threads, Filters, Metric Parallel, Screw Pitch, Thread Size Chart, Compressed Gas, and a whole lot more.

Hydraulic Actuators

Updated July, 201810 Materials

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

Learn about: Rotary Actuator, Motor, Rod, Blind End, Semi-Rotary Actuators, Linear Actuator, Gland, and a whole lot more.

Hydraulic Hazards & Safety

Updated January, 20173 Materials

Safe working habits around hydraulic systems save lives.

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

Hydraulic Schematic Symbols

Updated January, 20177 Materials

Schematic symbol reading is a vital troubleshooting skill.

Learn about: variable, logic valve, tank, pilot line, flow control, reservoir, shuttle valve, 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: steering valve, power steering, HMU, orbitrol, Hand Metering Unit, hydraulic steering, and a whole lot more.

Hydrostatic (Closed Loop) Systems

Updated July, 201813 Materials

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

Learn about: Mobile, Direct Linkage, Hydrostatic Loop, Heat, Closed Loop, Cavitation, Servo, 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: Orifice, Equilibrium, Flow Control, LS, Piston Pump, Margin Pressure, Hunting, and a whole lot more.

Open & Closed Center Systems

Updated January, 201710 Materials

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

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

Parallel & Series Systems

Updated February, 201916 Materials

Parallel and Series circuits behave very differently.

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

Positive & Non-Positive Pumping

Updated May, 201816 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: Cavitation, Positive Pressure, Charge Pump, Starved Inlet, Breather, Net Positive Suction Head, Non Positive Displacement, and a whole lot more.

Pressure & Flow

Updated October, 201816 Materials

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

Learn about: FPA Triangle, Velocity, Gauge, Fluid Velocity, Slippage, Resistance, Positive Displacement Pump, and a whole lot more.

Pressure Reducing Valves

Updated February, 20195 Materials

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

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

Pressure Relief Valves

Updated March, 201919 Materials

Jump into relief valves with this colorful session.

Learn about: poppet, relief valves, counterbalance valves, unloading valves, pressure override, external pilot, normally open, and a whole lot more.

Sequence Valves

Updated January, 20175 Materials

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

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

Troubleshooting Processes

Updated January, 20177 Materials

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

Learn about: easy-to-check order, Hit or Miss, Ten Step Troubleshooting Process, Downtime, TSTP, Guess and Check, Failure, 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, Volume Pump, Unloading Valve, Pressure, Restriction, External Pilot Section, Fast Approach Slow Feed Circuit, and a whole lot more.

15 Machinery Sessions

Blast Hole Drills

Updated March, 20183 Materials

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

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

Cat Excavators

Updated September, 20183 Materials

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Learn about: , and a whole lot more.

Cat Haul Trucks

Updated October, 20181 Material

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

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

Hydraulic Governor

Updated April, 20182 Materials

The governor is a critical component in hydroelectric dams.

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

Komatsu Haul Trucks

Updated September, 20187 Materials

Check this session out for a bundle of 830E and 930E Live Schematics.

Learn about: Hydraulic, 830E, Brakes, Split Spool Section, Hoist, Steering, Bleeddown Manifold, and a whole lot more.


Updated October, 20185 Materials

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

Learn about: Boom, Bucket, Shock Valve, Lift, Auxiliary, Steering, Tilt, 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: Clumping, Dust, Slurry, Cement Metering Valve, Oilfield, Cementing, Air Entrainment, and a whole lot more.

Oilfield Pumping

Updated June, 20186 Materials

Reciprocating plunger pumps are very common in oilfield pumping.

Learn about: Packing, Suction Valve, Reciprocating Plunger Pump, Quintuplex, Maintenance, Triplex, Positive Displacement Pumping, 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 and paper, Pulp bale press, and a whole lot more.

Rail Car Dumper

Updated May, 20181 Material

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

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

Sawmill Conveyors

Updated April, 20181 Material

Sawmills are full of specialized hydraulic and electrical equipment.

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

Truck Dumper

Updated November, 20181 Material

Step through the operational stages as a truck dumper runs in schematic form.

Learn about: Valve Solenoid Sequence Chart, Truck Dumper, and a whole lot more.

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