Session Listing

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

16 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: Resistance, Voltage, Watts, Ohm's Law, Amps, Power, Work, and a whole lot more.


Updated January, 20174 Materials

Welcome to the session on electrical connectors.

Learn about: Plug, Solder Sucker, Hirschmann, Data, Male, Optical Fiber, Female, and a whole lot more.


Updated January, 20174 Materials

Learn to use your multimeter to test a diode.

Learn about: P-type, Electrical, Rectifier, Light Emitting Diodes, NPN, LED, Multimeter, 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, Flame Resistant, Zero Energy, , Electrically Insulated Footwear, Hazards, Electrical PPE, 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: DMM, Electrician, Resistance Test, Open Circuit, Measurement, Fluke Meter, Electrical, 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: Fast acting fuse, Testing Fuses, Blown Fuse, Digital Multimeter, Short Circuit, Circuit breaker, Slow blow fuse, and a whole lot more.

Interpreting Electrical Schematics

Updated January, 20174 Materials

Schematics don't need to be confusing.

Learn about: Schematic, Tag, Troubleshooting, Electrician, Layout, Off-Page, Connection, 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: Skill, Electrical Fault, Hydraulic Loader Fault, System Diagnosis, Short Circuit Fault, Troubleshooting, Short Circuit, and a whole lot more.


Updated February, 20176 Materials

Relays are demystified in this interactive lesson.

Learn about: Troubleshooting, Schematic Symbol, Throw, Pole, Single Pole Double Throw, Diagnostic, Electrical Circuit, 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: Electronics, Maintenance, BJT, ESD, Electrical, MOV, Transistor, and a whole lot more.


Updated June, 201822 Materials

Sensors are everywhere in our electrical world.

Learn about: PNP, Span, Upper Range Value, Live Zero, Diaphragm, psi, Pressure, 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: Kirchoff's Voltage Law, Branch, Electrical Circuit, Electrician, Series, System Design, Industrial Maintenance, 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: Equalizer, Battery, Electrical, Troubleshooting, 24V, Starter, Alternator, and a whole lot more.


Updated January, 201712 Materials

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

Learn about: N.O., Normally Closed, Rating, 3 Way Switching, Push Button, Selector, Control, and a whole lot more.

Variable Resistors

Updated January, 20175 Materials

Potentiometers vs.

Learn about: Resistance, 2 lead, AC temperature control, Potentiometer, Rheostat, wiper, Variable Resistor, 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: Voltage, Resistance, Amps, Cycles Per Second, Control Voltage, Duty Cycle, PWM, 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: Runaway Load, Counterbalance Valve, Safety, Adjusting a Counterbalance Valve, Motion Control, Load Holding, Raised Load, 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: Flywheel Mass, Cross-Port Relief Valves, Regenerative, Overpressure, Braking Valves, and a whole lot more.

Electro-Hydraulic Valves

Updated June, 20182 Materials

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

Learn about: electro-hydraulic valves, servo valves, proportional valves, 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: Slippage, Rotating Group, Piston Pump, External Gear Pump, Rotor, On-Stroke, GPM, and a whole lot more.

Flow & Directional Control Valves

Updated May, 201818 Materials

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

Learn about: Float, Position, Three Section Valves, Infinite Position, 2-Stage Valves, Solenoid, Tandem, 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: Gallons Per Minute, Bernoulli's Principle, Rotational Force, Flow Rate, Static Pressure, Static Pressure, Turbulent Flow, and a whole lot more.

Hydraulic Accessories

Updated January, 20179 Materials

This session covers a handful of hydraulic accessories.

Learn about: Filters, Diameter, NPT, Compressed Gas, ISO 4406, Piston, BSPP, and a whole lot more.

Hydraulic Actuators

Updated January, 20179 Materials

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

Learn about: , Gland, Piston, Motor, Linear Actuator, Blind End, Rod, and a whole lot more.

Hydraulic Hazards & Safety

Updated January, 20173 Materials

Safe working habits around hydraulic systems save lives.

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

Hydraulic Schematic Symbols

Updated January, 20177 Materials

Schematic symbol reading is a vital troubleshooting skill.

Learn about: logic valve, check valve, electrical line, hydraulic pilot, detent, mechanical linkage, cylinder, 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: Hand Metering Unit, power steering, steering valve, HMU, orbitrol, hydraulic steering, and a whole lot more.

Hydrostatic (Closed Loop) Systems

Updated January, 201713 Materials

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

Learn about: Reversing Flow, Closed Loop, Charge Pump, Hot Loop, Servo, Cavitation, Hot Oil Shuttle Valve, 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 Sensing Compensator, Pressure Differential, Flow Control, Orifice, Equilibrium, 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: Mobile, Sectional Valve Bank, Closed Loop, Closed Center, Open Loop, Open Center, and a whole lot more.

Parallel & Series Systems

Updated January, 201721 Materials

Parallel and Series circuits behave very differently.

Learn about: Restriction, Parallel Circuits, Pressure Drops, Series Circuits, System Pressure, Branch, Path of Least Resistance, and a whole lot more.

Positive & Non-Positive Pumping

Updated January, 201721 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: Starved Inlet, Mechanical Erosion, Air, Positive Pressure, Non Positive Displacement, Cavitation, Positive Displacement, 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: Gauge, Slippage, Positive Displacement Pump, Hydraulic Flow, Hydraulic Pressure, Flow Rate, Resistance, 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: Pilot Operated, Direct Acting, Pressure, Pressure Reducing Valve, Downstream Pressure, Normally Closed, and a whole lot more.

Pressure Relief Valves

Updated January, 201721 Materials

Jump into relief valves with this colorful session.

Learn about: poppet, balanced relief valve, sequence valves, counterbalance valves, direct acting relief, pilot, pressure control valve, 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, Valve, Pressure, Set Pressure, Order, Sequence, and a whole lot more.

Troubleshooting Processes

Updated January, 20177 Materials

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

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

7 Machinery Sessions

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

Excavators & Shovels

Updated April, 201811 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, EHC Valve, Electro-hydraulic control valve, pump regulator, solenoid valves, heavy machinery, and a whole lot more.

Hydraulic Governor

Updated April, 20182 Materials

The governor is a critical component in hydroelectric dams.

Learn about: power, regulate, electricity, hydroelectric, generation, engine, dam, 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: Cementing, Diffuser, Clumping, Air Entrainment, Cement Metering Valve, Dry Blending, Dust, 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 May, 20181 Material

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

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

Sawmill Conveyors

Updated April, 20181 Material

Sawmills are full of specialized hydraulic and electrical equipment.

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

We Are Here To Help You

Find Answers at the Help Center


Toll Free (North America) 1-866-628-3224

Monday to Friday, 8am to 4pm MST

Bad News

JavaScript is not enabled in your browser.

We use JavaScript to power our training media, so you'll need to turn JavaScript on before you can use LunchBox Sessions. If you need help, email us at