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, Voltage, Work, Ohm's Law, 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 Frame, End Field, Extended CAN, Transceiver, NRZI, Data Field, Check Field, and a whole lot more.

Connectors

Updated January, 2017 • 4 Materials

Welcome to the session on electrical connectors.

Learn about: Coaxial, Male, Optical Fiber, Screw, Plug, Solder Sucker, Flux, and a whole lot more.

Diodes

Updated July, 2019 • 5 Materials

Learn to use your multimeter to test a diode.

Learn about: PNP, P-type, Semiconductor, Light Emitting Diodes, N-type, Troubleshooting, Multimeter, 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, Flame Resistant, Electrocution, Zero Energy, , Burn, Electrical PPE, 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: Electrical, Continuity Test, Open Circuit, Voltage Test, Measurement, Current Test, DMM, 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: Conductive, Mag Flow Meter, Mass Flow Rate, Faraday's Law of Electromagnetic Induction, Density, Electromagnetic Flow Meter, Magnetic Field, 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: Short Circuit, Circuit breaker, Inspecting Fuses, Blown Fuse, Electrical Circuit Protection, Testing Fuses, Fast acting fuse, and a whole lot more.

Interpreting Electrical Schematics

Updated January, 2017 • 4 Materials

Schematics don't need to be confusing.

Learn about: Draft, IES, Chassis Ground, Standard, Diagram, Earth Ground, NEMA, 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: Electrician, Meter Reading, Electrical Fault, Open Circuit Fault, Skill, Short Circuit, Open Circuit, 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: Proximity, Through-Beam, Retroreflective, Capacitive, Inductive, Thru-Beam, Sensor, 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: Diaphragm Gauge, psi, Piezoelectric Sensors, Pressure, Bourdon Tube Gauge, psia, Bar, and a whole lot more.

Relays

Updated September, 2018 • 7 Materials

Relays are demystified in this interactive lesson.

Learn about: Relay, Schematic Symbol, Switch, Pole, Throw, Troubleshooting, Single Pole Double Throw, 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: Electronics, Electrostatic Discharge, Troubleshooting, Electrical, Transistor, Component, JFET, and a whole lot more.

Sensor Basics

Updated October, 2019 • 15 Materials

Sensors are everywhere in our electrical world.

Learn about: Range, Sinking, Calibration, Transducer, PNP, Normalizing, Upper Range Value, 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: Branch, Kirchoff's Voltage Law, Electrical Circuit, KVL, Series, Electrician, Parallel, 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: Starter, Electrical, 24V, Alternator, Troubleshooting, 12V, Equalizer, 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: Single Pole, Three Way Switching, Throw, Double Pole, N.O., Pole, On-Off-On, and a whole lot more.

Variable Resistors

Updated January, 2017 • 5 Materials

Potentiometers vs.

Learn about: wiper, Resistance, AC temperature control, 2 lead, Potentiometer, Variable Resistor, Rheostat, 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: Digital Control, Duty Cycle, Analog Control, Hz, Amplitude, Root Mean Square, Frequency, 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: relief valves, poppet, area ratio, active control, hydraulics, damping valves, valve cover plate, 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, Counterbalance Valve, Load Holding, Motion Control, Adjusting a Counterbalance Valve, Safety, Runaway Load, 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: Cross-Port Relief Valves, Braking Valves, Flywheel Mass, Overpressure, 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: servo valves, moog, electro-hydraulic valves, proportional valves, and a whole lot more.

Fixed & Variable Displacement Pumps

Updated January, 2021 • 33 Materials

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

Learn about: External Gear Pump, Outlet, Piston Pump, Vanes, Compensator, GPM, Fixed Displacement, 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: Infinite Position, Operator, Float, Port, Center, Spool, Troubleshooting, 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: Static Pressure, Dynamic Pressure, Gallons Per Minute, Rotational Force, Force Multiplication, Work, Flow Rate, and a whole lot more.

Hydraulic Accessories

Updated June, 2020 • 11 Materials

This session covers a handful of hydraulic accessories.

Learn about: Female, Bladder, Material, Filtration, Metric Taper, Straight Threads, Filters, and a whole lot more.

Hydraulic Actuators

Updated January, 2021 • 14 Materials

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

Learn about: , Semi-Rotary Actuators, Troubleshooting, Motor, Cylinder, Blind End, Tube/Barrel, 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, Zero Energy State, Heat, System Adjustment Hazards, Hose and Fitting Failure, Unexpected Motion, Safety, 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, rotation, orifice, logic valve, drain line, drafting, manifold line, 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, HMU, steering valve, orbitrol, hydraulic steering, power 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: Hot Loop, Direct Linkage, Hydrostatic Loop, Cavitation, Hot Oil Shuttle Valve, Heat, Mobile, 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: Orifice, LS, Hunting, Piston Pump, Flow Control, Load Sensing Compensator, Margin Pressure, 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 Center, Sectional Valve Bank, Open Loop, Closed Loop, Mobile, Closed Center, and a whole lot more.

Parallel & Series Systems

Updated March, 2020 • 19 Materials

Parallel and Series circuits behave very differently.

Learn about: Pressure Drops, Parallel Circuits, System Pressure, Restriction, Series Circuits, Path of Least Resistance, Branch, 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, Control Stick, Pilot Controllers, Joysticks, Manual Pilot Control, Hydraulic Control, 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: Void Bubbles, Flooded Inlet, Slippage, Restriction, Air, Aeration, Net Positive Suction Head, 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, FPA Triangle, Fluid Velocity, Hydraulic Flow, Resistance, Slippage, 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: Direct Acting, Pilot Operated, 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: relief valves, relief pressure, cracking pressure, spool, pilot, pressure control valve, spring, 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: Pressure, Training, Order, Sub-Circuit, Valve, Sequence, 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, Failure, Downtime, TSTP, Ten Step Troubleshooting Process, Guess and Check, Hit or Miss, 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: Efficient, Unloading Valve, Pressure, Fast Approach Slow Feed Circuit, High-Low Circuit, Energy Saving, Volume Pump, 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: Mobile Elevated Work Platform, Aerial Work Platform, Scissor Lift Hydraulics, MEWP, AWP, Slab Scissor Lift, 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, Atlas Copco, Hydraulic Circuit, Blast Hole Drill, Holdback, 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: 385C, CAT, Track Drive, Bucket Circuit, Boom Circuit, Excavator, Caterpillar, 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, Steering Circuit, Haul Truck, 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: Stacker, Mining Equipment, Reclaimer, Hoist Circuit, Coal, 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, Coil tubing injector, hydraulic faults , coiled tubing, 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, concrete, truck, 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, EHC Valve, Electro-hydraulic control valve, pump regulator, 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, Cat Grader Schematics, Caterpillar Hydraulics, 24M Series, Brakes, 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: power, hydroelectric, regulate, electricity, governor, generation, hydraulic, 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, 930E, Bleeddown Manifold, Komatsu, Split Spool Section, Brakes, Live Schematic, 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: Haul Truck, Cooling Circuit, Hoist 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: Boom, Steering, Mobile Equipment Hydraulic, Tilt, Auxiliary, Shock Valve, 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, Lubricant, Hydraulic Lube Systems, Bearings, 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: Air Entrainment, Slurry, Cement Metering Valve, Diffuser, Cementing, Mixing Head, Clumping, and a whole lot more.

Oilfield Pumping

Updated June, 2018 • 6 Materials

Reciprocating plunger pumps are very common in oilfield pumping.

Learn about: Quintuplex, Power End, Fluid End, Re-packing, Triplex, Reciprocating Plunger Pump, Packing, 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: Nip Guard, Cradle, Roll Eject, Reeling, Winding, Calender, Paper Machine, 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, logic, Rail, slip-in cartridge, Pulp and Paper, low pressure standby, Dumper, and a whole lot more.

Sawmill

Updated August, 2020 • 4 Materials

Sawmills are full of specialized hydraulic and electrical equipment.

Learn about: Quadrant Feeder, Log, Hydraulic, Belt, 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.

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