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: Voltage, Ohm's Law, Current, Resistance, Energy Conversion, Ohms, Power, and a whole lot more.


Updated January, 20174 Materials

Welcome to the session on electrical connectors.

Learn about: Solenoid Valve Connector, Maintenance, Pin/Plug, Solder, Coaxial, Male, Data, and a whole lot more.


Updated January, 20174 Materials

Learn to use your multimeter to test a diode.

Learn about: P-type, Semiconductor, Rectifier, N-type, LED, Flyback, Troubleshooting, and a whole lot more.

Electrical Hazards & Safety

Updated March, 20183 Materials

Even low voltage systems can seriously injure or even kill.

Learn about: , Flame Resistant, Static Dissipative Footwear, Electrical PPE, Burn, Electrocution, Electrical Safety, 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: Voltmeter, Digital Multimeter, Electrician, Fluke Meter, Short Circuit, Electrical, Voltage Test, 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: Density, Magnetic Field, Flow, Electrodes, MFMS, Electromagnetic Flow Meter, 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: Short Circuit, Fuse, Fuse Test, Inspecting Fuses, Digital Multimeter, Electrical Circuit Protection, Fast acting fuse, and a whole lot more.

Interpreting Electrical Schematics

Updated January, 20174 Materials

Schematics don't need to be confusing.

Learn about: Electrical Schematic, Troubleshooting, Wire Crossing, Earth Ground, IES, Symbol, Signal Ground, 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: Troubleshooting, Electrician, System Diagnosis, Digital Multimeter, Electrical Fault, Open Circuit Fault, Short Circuit, 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: Sensor, Retroreflective, Thru-Beam, Diffuse, Inductive, 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: Differential, Pascal, Pressure, Pressure Sensor, Indicator Fluids, Gauge Pressure, Vacuum, and a whole lot more.


Updated September, 20187 Materials

Relays are demystified in this interactive lesson.

Learn about: Diagnostic, Troubleshooting, Schematic Symbol, Throw, Switch, Electrical Circuit, System, 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: BJT, Metal Oxide Varistor, Maintenance, ESD, JFET, FET, Schematic, and a whole lot more.

Sensor Basics

Updated August, 201814 Materials

Sensors are everywhere in our electrical world.

Learn about: Range, Sourcing, Calibration, Zero, Sinking, Live Zero, NPN, 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, KVL, Electrical Circuit, System Design, Branch, Troubleshooting, Series, 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, Alternator, Battery, Troubleshooting, 24V, 12V, Equalizer, 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.C., Throw, 3 Way Switching, On-Off-On, Control, Pole, Three Way Switching, and a whole lot more.

Variable Resistors

Updated January, 20175 Materials

Potentiometers vs.

Learn about: AC temperature control, Variable Resistor, Rheostat, Potentiometer, wiper, Resistance, 2 lead, 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: Direct Current, PWM, Analog Control, Amps, Duty Cycle, Hertz, Hz, 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: Counterbalance Valve, Adjusting a Counterbalance Valve, Motion Control, Safety, Load Holding, Raised Load, Runaway 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, Overpressure, Regenerative, Cross-Port Relief Valves, Braking Valves, 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, proportional valves, electro-hydraulic valves, servo 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: Compensator, Main Gear, Vanes, Rotor, LPM, Pressure Differential, Unbalanced Vane Pump, and a whole lot more.

Flow & Directional Control Valves

Updated October, 201819 Materials

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

Learn about: Infinite Position, Troubleshooting, Directional Control Valve, Tandem, Valve Stack, Port, Response, 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: Power, Force = Pressure x Area, Flow Viscosity, Flow, Rotational Force, Pascal's Law, gpm, and a whole lot more.

Hydraulic Accessories

Updated July, 201810 Materials

This session covers a handful of hydraulic accessories.

Learn about: Crest, Thread Size Chart, Poppet, BSPP, Complete Threads, Calipers, 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: Piston, TSTP, Troubleshooting, Blind End, Rotary Actuator, Semi-Rotary Actuators, , 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, Hose and Fitting Failure, Flammability, Pinch Points, Heat, Unexpected Motion, Zero Energy State, and a whole lot more.

Hydraulic Schematic Symbols

Updated January, 20177 Materials

Schematic symbol reading is a vital troubleshooting skill.

Learn about: drafting, shuttle valve, variable, operator, rotation, electrical line, mechanical linkage, 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, HMU, orbitrol, power steering, hydraulic steering, steering valve, 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: Hot Oil Shuttle Valve, Cross Port Relief, Cavitation, Charge Pump, Reversing Flow, Servo, Heat, 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: LS, Orifice, Load Sensing Compensator, Pressure Differential, Equilibrium, Margin Pressure, Piston Pump, 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: Open Loop, Open Center, Sectional Valve Bank, Mobile, Closed Loop, Closed Center, and a whole lot more.

Parallel & Series Systems

Updated January, 201721 Materials

Parallel and Series circuits behave very differently.

Learn about: Branch, System Pressure, Load, Restriction, Parallel Circuits, Series Circuits, Path of Least Resistance, 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: Slippage, Non Positive Displacement, Aeration, Charge Pump, Cavitation, Partial Vacuum Pressure, Starved Inlet, and a whole lot more.

Pressure & Flow

Updated October, 201823 Materials

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

Learn about: Flow Rate, Hydraulic Pressure, Gauge, Resistance, Fluid Velocity, Velocity, Hydraulic Flow, 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, Pilot Operated, Pressure Reducing Valve, Downstream Pressure, Direct Acting, Normally Closed, and a whole lot more.

Pressure Relief Valves

Updated January, 201721 Materials

Jump into relief valves with this colorful session.

Learn about: direct acting relief, cracking pressure, normally open, sequence valves, balanced relief valve, cartridge, pressure spikes, and a whole lot more.

Sequence Valves

Updated January, 20175 Materials

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

Learn about: Sequence, Set Pressure, Pressure, Valve, Sub-Circuit, Order, Training, 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, easy-to-check order, Downtime, Ten Step Troubleshooting Process, TSTP, Hit or Miss, 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: Balanced Relief Valve, Pressure Pump , Efficient, Fast Approach Slow Feed Circuit, External Pilot Section, Restriction, Energy Saving, and a whole lot more.

14 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: Blast Hole Drill, Propel, Simulation, Atlas Copco, Diverter, Holdback, Hydraulic Circuit, and a whole lot more.

Cat Excavators

Updated September, 20183 Materials

No description.

Learn about: , and a whole lot more.

Cat Haul Trucks

Updated October, 20181 Material

No description.

Learn about: , and a whole lot more.

Coal Stacker-Reclaimer

Updated June, 20182 Materials

No description.

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: hydraulic faults , chain tension, injector traction, coiled tubing, Coil tubing injector, 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: Electro-hydraulic control valve, pump controller, solenoid valves, heavy machinery, pump regulator, EHC Valve, and a whole lot more.

Hydraulic Governor

Updated April, 20182 Materials

The governor is a critical component in hydroelectric dams.

Learn about: governor, engine, power, generation, regulate, electricity, hydraulic, 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: Split Spool Section, Inlet Section, Live Schematic, Steering, Komatsu, Bleeddown Manifold, Hoist, 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: Mobile Equipment Hydraulic, Lift, Boom, Loader Schematic, Bucket, Auxiliary, 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: Slurry, Dry Blending, Cement Metering Valve, Air Entrainment, Dust, Mixing Head, Diffuser, and a whole lot more.

Oilfield Pumping

Updated June, 20186 Materials

Reciprocating plunger pumps are very common in oilfield pumping.

Learn about: Discharge Valve, Positive Displacement Pumping, Triplex, High Pressure Pumping, Reciprocating Plunger Pump, Quintuplex, Packing, 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: slip-in cartridge, logic, Pulp and Paper, Car, Rail, low pressure standby, Dumper, and a whole lot more.

Sawmill Conveyors

Updated April, 20181 Material

Sawmills are full of specialized hydraulic and electrical equipment.

Learn about: Belt, Quadrant Feeder, Sawmill, Hydraulic, Conveyor, Log, 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