Session Listing

A complete list of all the subjects we cover.

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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: Watts, Resistance, Energy Conversion, Current, Work, Power, Amps, and a whole lot more.

CAN Bus

Updated December, 2018 • 5 Materials

Ready to learn about the CAN Bus Protocol.

Learn about: Message Identifier, Message Frame, Controller, Control Field, Data Field, CAN Bus Protocol, Standard CAN, and a whole lot more.

Connectors

Updated January, 2017 • 4 Materials

Welcome to the session on electrical connectors.

Learn about: Amphenol, Power, Jack, Signal, Connector, Maintenance, Wick, and a whole lot more.

Diodes

Updated July, 2019 • 5 Materials

Learn to use your multimeter to test a diode.

Learn about: P-type, Circuit, N-type, Flyback, Multimeter, Electrical, Semiconductor, 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: Hazards, Electrically Insulated Footwear, , Electrical Safety, Flame Resistant, Zero Energy, Static Dissipative Footwear, 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: Continuity Test, Electrician, Voltmeter, Resistance Test, DMM, Test For Blown Fuse, Fluke Meter, 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: Faraday's Law of Electromagnetic Induction, Electrodes, Density, Rate, Mass Flow Measuring System, Electromagnetic Flow Meter, Flow, 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, Digital Multimeter, Inspecting Fuses, Slow blow fuse, Short Circuit, Fuse Test, Fuse, and a whole lot more.

Interpreting Electrical Schematics

Updated January, 2017 • 4 Materials

Schematics don't need to be confusing.

Learn about: Electronics, Signal Ground, Layout, Standard, Chassis Ground, Wire Crossing, Bus, 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: Digital Multimeter, Short Circuit Fault, Skill, Troubleshooting, Short Circuit, Ten Step Troubleshooting Process, Meter Reading, and a whole lot more.

Position Sensors

Updated April, 2021 • 13 Materials

Magnetic, Hall Effect, Inductive, Capacitive, Photoelectric, Magnetostrictive and Ultrasonic proximity, speed and position sensors are covered in this session.

Learn about: Ultrasonic, Thru-Beam, Magnetostrictive, Inductive, Diffuse, Nominal Range, Proximity, 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: Piezoelectric Sensors, Vacuum, Manometer, Bar, Pressure Sensor, psig, Wheatstone Bridge, and a whole lot more.

Relays

Updated September, 2018 • 7 Materials

Relays are demystified in this interactive lesson.

Learn about: Troubleshooting, Throw, Electrical Circuit, Relay, System, Switch, Diagnostic, 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: Maintenance, Semiconductor, JFET, BJT, Troubleshooting, MOV, ESD, and a whole lot more.

Sensor Basics

Updated October, 2019 • 15 Materials

Sensors are everywhere in our electrical world.

Learn about: Sensor, Span, Live Zero, Zero, Upper Range Value, Sinking, 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: Industrial Maintenance, Troubleshooting, Parallel, Electrical Circuit, Electrician, Branch, Kirchoff's Voltage Law, 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: 24V, Electrical, Troubleshooting, Battery, Starter, 12V, Alternator, and a whole lot more.

Switches

Updated March, 2021 • 14 Materials

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

Learn about: Push Button, Control, Three Way Switching, Single Pole, Double Pole, Normally Open, On-Off-On, and a whole lot more.

Variable Resistors

Updated January, 2017 • 5 Materials

Potentiometers vs.

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

Waveforms & Signal Generation

Updated February, 2021 • 9 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: Cycles Per Second, Analog Control, DC, Alternating Current, PWM, Root Mean Square, Hz, 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: damping valves, valve cover plate, pressure valves, check valves, two-port slip-in cartridge valves, logic valve circuits, active control, 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: Runaway Load, Counterbalance Valve, Adjusting a Counterbalance Valve, Load Holding, Motion Control, Raised Load, 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, Braking Valves, Overpressure, Cross-Port Relief Valves, Regenerative, 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: proportional valves, servo valves, moog, electro-hydraulic valves, and a whole lot more.

Fixed & Variable Displacement Pumps

Updated February, 2021 • 34 Materials

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

Learn about: Balanced Vane Pump, Internal Gear Pump, Pressure, LPM, Variable Displacement, Off-Stroke, Wear, and a whole lot more.

Flow & Directional Control Valves

Updated January, 2021 • 35 Materials

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

Learn about: 2-Stage Valves, Float, Position, Three Section Valves, Center, Flow Paths, Two Section Valves, 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: lpm, Laminar Flow, Pressure, Flow Viscosity, Flow, Work, Bernoulli's Principle, and a whole lot more.

Hydraulic Accessories

Updated April, 2021 • 11 Materials

This session covers a handful of hydraulic accessories.

Learn about: Root, Fittings, Material, Screw Pitch, Brackets, Thread Size Chart, Piston, and a whole lot more.

Hydraulic Actuators

Updated April, 2021 • 14 Materials

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

Learn about: TSTP, Tube/Barrel, Rod End, Rod, Cylinder, Seal, Rotary Actuator, and a whole lot more.

Hydraulic Hazards & Safety

Updated January, 2017 • 3 Materials

Safe working habits around hydraulic systems save lives.

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

Hydraulic Schematic Symbols

Updated October, 2020 • 10 Materials

Schematic symbol reading is a vital troubleshooting skill.

Learn about: Schematic symbols, shuttle valve, hydraulic pilot, detent, solenoid, rotation, cylinder, 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: Hand Metering Unit, hydraulic steering, steering valve, power steering, HMU, orbitrol, 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: Servo, Reversing Flow, Charge Pump, Pressure Compensated Pump, Mobile, Closed Loop, Cavitation, and a whole lot more.

Load Sensing Pumps

Updated March, 2021 • 18 Materials

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

Learn about: Load Sensing Compensator, Piston Pump, Flow Control, Pressure Differential, Orifice, Load Sense, Equilibrium, 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: Open Loop, Closed Loop, Open Center, Closed Center, Sectional Valve Bank, Mobile, and a whole lot more.

Parallel & Series Systems

Updated March, 2020 • 19 Materials

Parallel and Series circuits behave very differently.

Learn about: Branch, Load, Parallel Circuits, Path of Least Resistance, Series Circuits, System Pressure, Restriction, 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: Manual Pilot Control, Joysticks, Pilot Valve, Control Stick, Hydraulic Control, Pilot Controllers, 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: Positive Displacement, Cavitation, Breather, Air, Partial Vacuum Pressure, Flooded Inlet, Aeration, 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: Gauge, Slippage, Velocity, Hydraulic Pressure, Fluid Velocity, Hydraulic Flow, Flow Rate, 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: Pressure Reducing Valve, Downstream Pressure, Normally Closed, Pressure, Pilot Operated, Direct Acting, and a whole lot more.

Pressure Relief Valves

Updated March, 2021 • 29 Materials

Jump into relief valves with this colorful session.

Learn about: setting pressure, normally closed, pressure spikes, cartridge, cracking pressure, pilot, direct acting relief, and a whole lot more.

Sequence Valves

Updated December, 2020 • 5 Materials

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

Learn about: Sequence, Hydraulic, Training, Pressure, Sub-Circuit, Order, Set Pressure, 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, Ten Step Troubleshooting Process, Guess and Check, Downtime, TSTP, Hit or Miss, Failure, 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: Restriction, Pressure Pump , External Pilot Section, Pressure, Volume Pump, Efficient, Energy Saving, and a whole lot more.

22 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, Mobile Elevated Work Platform, Scissor Lift Hydraulics, MEWP, Aerial Work Platform, AWP, 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: Drill, Brakes, Diverter, Holdback, Atlas Copco, Blast Hole Drill, Simulation, 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: Bucket Circuit, Track Drive, CAT, Caterpillar, 385C, Boom Circuit, Swing Circuit, and a whole lot more.

Cat Haul Trucks

Updated January, 2021 • 3 Materials

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

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

Cement Plants

Updated April, 2021 • 1 Material

In this session you can learn about the inner workings for the hydraulics of a guillotine gate in a cement plant..

Learn about: Cement Mixer, Cement, Guillotine Gate, Cement Plant, 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, Mining Equipment, Hoist Circuit, Coal, Stacker, and a whole lot more.

Coiled Tubing Units

Updated January, 2021 • 20 Materials

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

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

Concrete Pump

Updated November, 2019 • 4 Materials

This session is all about truck-mounted concrete pumps.

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

Dozers

Updated March, 2021 • 1 Material

Explore a dozer in this session with one of our Live Schematic simulations, featuring a side-by-side view of the schematic and a cutaway graphic.

Learn about: Hydraulics, Tilt, Lift, Caterpillar, D11R, Dozer, Cat, and a whole lot more.

Graders

Updated December, 2020 • 13 Materials

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

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

Hydraulic Governor

Updated April, 2018 • 2 Materials

The governor is a critical component in hydroelectric dams.

Learn about: electricity, governor, regulate, generation, engine, hydroelectric, 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, Hydraulic, 830E, Steering, Hoist, Live Schematic, Bleeddown Manifold, and a whole lot more.

Liebherr Haul Trucks

Updated January, 2021 • 2 Materials

Interact with and learn about Liebherr haul trucks with a few live schematics in this session.

Learn about: Hoist Circuit, Haul Truck, Cooling Circuit, Simulations, 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: Lift, Steering, Shock Valve, Bucket, Front-End Loader, Auxiliary, Loader Schematic, 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: Simulation, Bearings, Hydraulic Lube Systems, 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: piston compressor, air governor, 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: Dry Blending, Air Entrainment, Slurry, Cementing, Clumping, Oilfield, Mixing Head, and a whole lot more.

Oilfield Pumping

Updated June, 2018 • 6 Materials

Reciprocating plunger pumps are very common in oilfield pumping.

Learn about: Packing, Power End, Fluid End, Maintenance, Quintuplex, Re-packing, Positive Displacement Pumping, 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: Cradle, Calender, Reeling, Roll Eject, Winding, Nip Guard, Paper Machine, and a whole lot more.

Pulp Mill Machinery

Updated April, 2021 • 10 Materials

A pulp mill has the equivalent horsepower of a dozen freight trains of machinery running inside.

Learn about: Pulp bale press, Pulp and Paper, Car, Dumper, logic, Rail, wire drive, and a whole lot more.

Sawmill

Updated August, 2020 • 4 Materials

Sawmills are full of specialized hydraulic and electrical equipment.

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

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