Session Listing

A complete list of all the subjects we cover.

Download Our Brochure PDF

20 Electrical Sessions

Basic Electrical Concepts

Updated March, 2018 • 4 Materials

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

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

CAN Bus

Updated December, 2018 • 5 Materials

Ready to learn about the CAN Bus Protocol.

Learn about: Check Field, Terminal, Recessive Bit, Extended CAN, Transceiver, Arbitration, NRZI, and a whole lot more.

Connectors

Updated January, 2017 • 4 Materials

Welcome to the session on electrical connectors.

Learn about: Female, Metri-Pack, Male, Connector, Crimp, Weather Pack, Solenoid Valve Connector, and a whole lot more.

Diodes

Updated July, 2019 • 5 Materials

Learn to use your multimeter to test a diode.

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

Electrical Hazards & Safety

Updated March, 2018 • 3 Materials

Even low voltage systems can seriously injure or even kill.

Learn about: Electrically Insulated Footwear, Hazards, Electrocution, Electrical Safety, Zero Energy, Burn, , and a whole lot more.

Electrical Measurements

Updated January, 2017 • 4 Materials

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

Learn about: Ammeter, DMM, Continuity Test, Electrical, Test For Blown Fuse, Short Circuit, Voltage Test, and a whole lot more.

Flow Sensors

Updated July, 2018 • 3 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: Mag Flow Meter, Mass Flow Rate, Conductive, Density, Magnetic Field, Mass Flow Measuring System, Coriolis, and a whole lot more.

Fuses & Circuit Breakers

Updated January, 2017 • 2 Materials

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

Learn about: Fast acting fuse, Testing Fuses, Digital Multimeter, Fuse, Blown Fuse, Circuit breaker, Slow blow fuse, and a whole lot more.

Interpreting Electrical Schematics

Updated January, 2017 • 4 Materials

Schematics don't need to be confusing.

Learn about: Schematic, Wire Crossing, IES, Symbol, Electrical Schematic, Layout, Chassis Ground, and a whole lot more.

Open & Short Circuit Faults

Updated April, 2019 • 7 Materials

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

Learn about: Open Circuit Fault, Short Circuit, Electrician, Meter Reading, System Diagnosis, Open Circuit, Short Circuit Fault, and a whole lot more.

Position Sensors

Updated July, 2018 • 9 Materials

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

Learn about: Diffuse, Inductive, Photoelectric, Proximity, Sensor, Capacitive, Ultrasonic, and a whole lot more.

Pressure Sensors

Updated July, 2018 • 10 Materials

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

Learn about: Wheatstone Bridge, Absolute Pressure, Bar, Vacuum, psig, Gauge Pressure, Variable Capacitance Sensor, and a whole lot more.

Relays

Updated September, 2018 • 7 Materials

Relays are demystified in this interactive lesson.

Learn about: Relay, Diagnostic, Troubleshooting, Electrical Circuit, Pole, Switch, Schematic Symbol, and a whole lot more.

Semiconductors

Updated January, 2017 • 3 Materials

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

Learn about: MOV, Electrostatic Discharge, Transistor, BJT, Semiconductor, Electrical, Metal Oxide Varistor, and a whole lot more.

Sensor Basics

Updated October, 2019 • 15 Materials

Sensors are everywhere in our electrical world.

Learn about: Upper Range Value, Span, Range, Zero, Sinking, NPN, Calibration, and a whole lot more.

Series & Parallel Circuit Basics

Updated August, 2019 • 9 Materials

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

Learn about: Electrical Circuit, Industrial Maintenance, Electrician, Parallel, KVL, Series, Branch, and a whole lot more.

Starting & Charging Systems

Updated January, 2017 • 3 Materials

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

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

Switches

Updated July, 2019 • 13 Materials

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

Learn about: Normally Closed, Normally Open, Single Pole, Throw, Push Button, On-Off-On, Toggle, and a whole lot more.

Variable Resistors

Updated January, 2017 • 5 Materials

Potentiometers vs.

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

Waveforms & Signal Generation

Updated October, 2018 • 8 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: Hz, Control Voltage, Triangle Wave, Cycles Per Second, Amps, AC, Pulse Width Modulation, and a whole lot more.

24 Hydraulics Sessions

Cartridge Valves

Updated July, 2020 • 5 Materials

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

Learn about: check valves, relief valves, valve cover plate, active control, two-port slip-in cartridge valves, area ratio, hydraulics, and a whole lot more.

Counterbalance Valves

Updated September, 2019 • 7 Materials

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

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

Cross-Port Relief Valves

Updated February, 2020 • 5 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, Regenerative, Cross-Port Relief Valves, Overpressure, Braking Valves, and a whole lot more.

Electro-Hydraulic Valves

Updated June, 2020 • 8 Materials

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

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

Fixed & Variable Displacement Pumps

Updated June, 2020 • 32 Materials

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

Learn about: Pressure, Driven Gear, Balanced Vane Pump, Pressure Differential, Fixed Displacement, Outlet, Gear Pump, and a whole lot more.

Flow & Directional Control Valves

Updated August, 2020 • 34 Materials

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

Learn about: DCV, Position, Solenoid, Flow Paths, Center, Open, Directional Control Valve, and a whole lot more.

Fluid Power Basics

Updated September, 2018 • 8 Materials

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

Learn about: Force, Force, Dynamic Pressure, Energy, Litres Per Minute, Laminar Flow, Power, and a whole lot more.

Hydraulic Accessories

Updated June, 2020 • 11 Materials

This session covers a handful of hydraulic accessories.

Learn about: Sleeve, Straight Threads, Accumulator, Precharge, Hydraulic Hose Pressure Rating, Compressed Gas, Contamination, and a whole lot more.

Hydraulic Actuators

Updated September, 2019 • 13 Materials

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

Learn about: Seal, Semi-Rotary Actuators, Piston, Rotary Actuator, Cylinder, TSTP, , and a whole lot more.

Hydraulic Hazards & Safety

Updated January, 2017 • 3 Materials

Safe working habits around hydraulic systems save lives.

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

Hydraulic Schematic Symbols

Updated October, 2020 • 10 Materials

Schematic symbol reading is a vital troubleshooting skill.

Learn about: drafting, variable, cylinder, Schematic symbols, logic valve, cartridge valve, operator, and a whole lot more.

Hydraulic Steering

Updated September, 2019 • 6 Materials

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

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

Hydrostatic (Closed Loop) Systems

Updated July, 2020 • 17 Materials

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

Learn about: Pressure Compensated Pump, Hot Loop, Heat, Closed Loop, Cross Port Relief, Cavitation, Hydrostatic Loop, and a whole lot more.

Load Sensing Pumps

Updated August, 2020 • 18 Materials

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

Learn about: Load Sense, Orifice, Load Sensing Compensator, Hunting, Piston Pump, Equilibrium, LS, and a whole lot more.

Open & Closed Center Systems

Updated July, 2020 • 10 Materials

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

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

Parallel & Series Systems

Updated March, 2020 • 19 Materials

Parallel and Series circuits behave very differently.

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

Pilot Controllers

Updated April, 2020 • 3 Materials

Whether you're using a joystick to raise or swing a boom, or floor pedals for forward or reverse track motion, you're interacting with a pilot controller.

Learn about: Pilot Valve, Joysticks, Pilot Controllers, Manual Pilot Control, Hydraulic Control, Control Stick, and a whole lot more.

Positive & Non-Positive Pumping

Updated August, 2020 • 15 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: Net Positive Suction Head, Charge Pump, Breather, Mechanical Erosion, Flooded Inlet, Non Positive Displacement, Partial Vacuum Pressure, and a whole lot more.

Pressure & Flow

Updated February, 2020 • 24 Materials

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

Learn about: Hydraulic Flow, Positive Displacement Pump, Slippage, Gauge, Fluid Velocity, Flow Rate, Velocity, and a whole lot more.

Pressure Reducing Valves

Updated June, 2020 • 7 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, Pressure Reducing Valve, Normally Closed, Pressure, and a whole lot more.

Pressure Relief Valves

Updated September, 2020 • 29 Materials

Jump into relief valves with this colorful session.

Learn about: pressure spikes, normally open, relief valves, pressure override, cartridge, spring, normally closed, and a whole lot more.

Sequence Valves

Updated August, 2019 • 5 Materials

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

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

Troubleshooting Processes

Updated January, 2017 • 7 Materials

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

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

Unloading Valves

Updated January, 2020 • 7 Materials

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

Learn about: High-Low Circuit, Unloading Valve, Restriction, Balanced Relief Valve, Efficient, Pressure, External Pilot Section, and a whole lot more.

21 Machinery Sessions

Aerial Work Platforms

Updated April, 2020 • 1 Material

The world of the aerial work platform (AWP) or the mobile elevated work platform (MEWP) includes a group of machines that are very popular in construction and building maintenance.

Learn about: Slab Scissor Lift, MEWP, Scissor Lift Hydraulics, AWP, Aerial Work Platform, Mobile Elevated Work Platform, and a whole lot more.

Blast Hole Drills

Updated March, 2018 • 3 Materials

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

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

Cat Excavators

Updated March, 2020 • 3 Materials

Familiarize yourself with the inner workings of excavator hydraulic systems that are specific to Caterpillar.

Learn about: Track Drive, Boom Circuit, 385C, Excavator, Swing Circuit, Caterpillar, CAT, and a whole lot more.

Cat Haul Trucks

Updated May, 2019 • 2 Materials

Explore Caterpillar haul trucks with a couple animated circuits in this session.

Learn about: Hoist Circuit, Haul Truck, Steering Circuit, Simulations, and a whole lot more.

Coal Stacker-Reclaimer

Updated July, 2020 • 2 Materials

Coal stacker-reclaimers are used to either receive coal or to stockpile it.

Learn about: Reclaimer, Hoist Circuit, Mining Equipment, Stacker, Coal, and a whole lot more.

Coiled Tubing Units

Updated October, 2020 • 19 Materials

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

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

Concrete Pump

Updated November, 2019 • 4 Materials

This session is all about truck-mounted concrete pumps.

Learn about: cement, duplex plunger pump, truck, concrete, and a whole lot more.

Deere-Hitachi Excavators & Shovels

Updated April, 2020 • 22 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, Electro-hydraulic control valve, pump controller, pump regulator, EHC Valve, heavy machinery, and a whole lot more.

Graders

Updated November, 2020 • 12 Materials

Enjoy this collection of videos and simulations about Graders, such as the Caterpillar H Series and the M Series.

Learn about: Cat Grader Schematics, 24H Series, 24M Series, Implements, Steering, Caterpillar Hydraulics, Brakes, and a whole lot more.

Hydraulic Governor

Updated April, 2018 • 2 Materials

The governor is a critical component in hydroelectric dams.

Learn about: power, regulate, hydroelectric, hydraulic, electricity, engine, dam, and a whole lot more.

Komatsu Haul Trucks

Updated July, 2020 • 8 Materials

Check this session out for a bundle of 830E and 930E Live Schematics, plus a 3D video.

Learn about: Inlet Section, Live Schematic, Hydraulic, 930E, Bleeddown Manifold, Komatsu, Steering, and a whole lot more.

Loaders

Updated February, 2020 • 9 Materials

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

Learn about: Shock Valve, Auxiliary, Steering, Bucket, Lift, Tilt, Front-End Loader, and a whole lot more.

Lube Systems

Updated September, 2019 • 2 Materials

Keeping bearings and gears lubricated in a production environment often involves a pumped lubricant.

Learn about: Hydraulic Lube Systems, Simulation, Bearings, Lubricant, and a whole lot more.

Mobile Equipment Air Compressors

Updated December, 2019 • 4 Materials

This session is an introduction to some mobile pneumatic system basics.

Learn about: air governor, piston compressor, Mobile pneumatics, and a whole lot more.

Oilfield Cementing

Updated May, 2018 • 1 Material

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

Learn about: Cementing, Dry Blending, Mixing Head, Cement Metering Valve, Slurry, Clumping, Air Entrainment, and a whole lot more.

Oilfield Pumping

Updated June, 2018 • 6 Materials

Reciprocating plunger pumps are very common in oilfield pumping.

Learn about: High Pressure Pumping, Maintenance, Re-packing, Suction Valve, Power End, Quintuplex, Reciprocating Plunger Pump, and a whole lot more.

Paper Machine Reels & Winders

Updated October, 2020 • 4 Materials

Paper machines depend on hydraulic systems for precise forces, fast motions, and careful load handling.

Learn about: Calender, Paper Machine, Winding, Nip Guard, Reeling, Roll Eject, Cradle, and a whole lot more.

Pulp Bale & Slab Presses

Updated November, 2020 • 5 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, 2020 • 1 Material

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

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

Sawmill

Updated August, 2020 • 4 Materials

Sawmills are full of specialized hydraulic and electrical equipment.

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

Truck Dumper

Updated July, 2020 • 2 Materials

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.

We're here to help.

Find answers at the Help Center

Email support@lunchboxsessions.com

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

Monday to Friday, 8am to 4pm MST

About Plans & Pricing Live Streams

Class Login Session Listing Server Status

97.9% positive feedback this month. Nice.