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

CAN Bus

Updated December, 2018 • 5 Materials

Ready to learn about the CAN Bus Protocol.

Learn about: Check Field, Non-Return to Zero Inverted, Bus, Message Frame, Node, End Field, Controller, and a whole lot more.

Connectors

Updated January, 2017 • 4 Materials

Welcome to the session on electrical connectors.

Learn about: Control, Pin/Plug, Hirschmann, Amphenol, Male, Solder Joint, Screw, and a whole lot more.

Diodes

Updated July, 2019 • 5 Materials

Learn to use your multimeter to test a diode.

Learn about: NPN, P-type, Bias, Light Emitting Diodes, Electrical, LED, 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: , Electrocution, Electrically Insulated Footwear, Electrical PPE, Electrical Safety, Flame Resistant, Hazards, 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: Voltage Test, Test For Blown Fuse, Ammeter, Resistance Test, Digital Multimeter, Voltmeter, 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: Mag Flow Meter, Rate, Flow, Conductive, Magnetic Field, Mass Flow Measuring System, Electrodes, 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: Blown Fuse, Electrical Circuit Protection, Fast acting fuse, Fuse Test, Digital Multimeter, Slow blow fuse, Testing Fuses, and a whole lot more.

Interpreting Electrical Schematics

Updated January, 2017 • 4 Materials

Schematics don't need to be confusing.

Learn about: IES, Standard, Bus, Electrician, NEMA, Connection, Electrical Schematic, 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, Electrician, Open Circuit Fault, Short Circuit, Skill, Open Circuit, Hydraulic Loader Fault, and a whole lot more.

Position Sensors

Updated March, 2021 • 10 Materials

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

Learn about: Through-Beam, Diffuse, Capacitive, Nominal Range, Inductive, Retroreflective, Photoelectric, 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, Vacuum, Pressure Sensor, Variable Capacitance Sensor, Piezoelectric Sensors, Pascal, Strain Gauges, and a whole lot more.

Relays

Updated September, 2018 • 7 Materials

Relays are demystified in this interactive lesson.

Learn about: Electrical Circuit, System, Single Pole Double Throw, Throw, Pole, Troubleshooting, Switch, 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: Semiconductor, Maintenance, Transistor, Metal Oxide Varistor, Troubleshooting, Electrostatic Discharge, ESD, and a whole lot more.

Sensor Basics

Updated October, 2019 • 15 Materials

Sensors are everywhere in our electrical world.

Learn about: Lower Range Value, NPN, Upper Range Value, Normalizing, Sensor, Span, Sourcing, 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: Electrician, Kirchoff's Voltage Law, Industrial Maintenance, Series, Parallel, KVL, Electrical Circuit, 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, 12V, Battery, Troubleshooting, Equalizer, Alternator, Starter, 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: Push Button, 3 Way Switching, Selector, Normally Closed, Switch, Normally Open, N.C., and a whole lot more.

Variable Resistors

Updated January, 2017 • 5 Materials

Potentiometers vs.

Learn about: 2 lead, Resistance, wiper, Variable Resistor, Rheostat, Potentiometer, AC temperature control, 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: Sin Wave, Volts, PWM, Hertz, Alternating Current, Analog Control, Voltage, 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, active control, valve cover plate, two-port slip-in cartridge valves, check valves, area ratio, throttle valves, 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, Load Holding, Counterbalance Valve, Raised Load, Adjusting a Counterbalance Valve, Motion Control, 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: Braking Valves, Regenerative, Overpressure, Cross-Port Relief Valves, Flywheel Mass, 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: moog, electro-hydraulic valves, servo valves, proportional 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: Unbalanced Vane Pump, Fixed Displacement, Swash Plate, Driven Gear, Variable Displacement, Wear, Gerotor, 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: Spool, Troubleshooting, TSTP, DCV, Port, Three Section Valves, Choke, 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: Viscosity, Surface Area, Hydraulic, Litres Per Minute, Force, lpm, Area, and a whole lot more.

Hydraulic Accessories

Updated June, 2020 • 11 Materials

This session covers a handful of hydraulic accessories.

Learn about: Dynamic Threads, Filtration, Poppet, Precharge, Brackets, Complete Threads, Contamination, 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, Rod, TSTP, Rotary Actuator, Rod End, Troubleshooting, Piston, and a whole lot more.

Hydraulic Hazards & Safety

Updated January, 2017 • 3 Materials

Safe working habits around hydraulic systems save lives.

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

Hydraulic Schematic Symbols

Updated October, 2020 • 10 Materials

Schematic symbol reading is a vital troubleshooting skill.

Learn about: manifold line, pilot line, drafting, Schematic symbols, spring, ball valve, hydraulic pilot, 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, power steering, steering valve, orbitrol, hydraulic steering, HMU, 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 Oil Shuttle Valve, Direct Linkage, Cross Port Relief, Hot Loop, Heat, Closed Loop, Pressure Compensated Pump, 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: Margin Pressure, LS, Piston Pump, Pressure Differential, Load Sensing Compensator, Hunting, 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, Sectional Valve Bank, Closed Loop, Mobile, Closed Center, Open Center, and a whole lot more.

Parallel & Series Systems

Updated March, 2020 • 19 Materials

Parallel and Series circuits behave very differently.

Learn about: Series Circuits, Restriction, Path of Least Resistance, Parallel Circuits, Load, Branch, System Pressure, 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, Hydraulic Control, Manual Pilot Control, Joysticks, Control Stick, 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: Restriction, Air, Cavitation, Charge Pump, Non Positive Displacement, Void Bubbles, 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: Resistance, Slippage, Velocity, Hydraulic Pressure, Positive Displacement Pump, Flow Rate, Gauge, 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: Downstream Pressure, Pressure Reducing Valve, Direct Acting, Normally Closed, Pilot Operated, Pressure, and a whole lot more.

Pressure Relief Valves

Updated September, 2020 • 29 Materials

Jump into relief valves with this colorful session.

Learn about: limit maximum system pressure, setting pressure, relief valves, balanced relief valve, pressure spikes, pilot, cartridge, 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: Order, Pressure, Sequence, Hydraulic, Sub-Circuit, Valve, Training, 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: Downtime, Failure, Hit or Miss, easy-to-check order, Guess and Check, TSTP, Ten Step Troubleshooting Process, 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: Pressure Pump , Unloading Valve, Balanced Relief Valve, External Pilot Section, Pressure, Fast Approach Slow Feed Circuit, High-Low Circuit, 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, Aerial Work Platform, MEWP, AWP, Scissor Lift Hydraulics, 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: Propel, Diverter, Drill, Holdback, Hydraulic Circuit, Brakes, Animation, 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, Bucket Circuit, Swing Circuit, Excavator, Boom Circuit, Caterpillar, 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: Simulations, Haul Truck, Hoist Circuit, Steering Circuit, 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: Coal, Mining Equipment, Stacker, Hoist Circuit, Reclaimer, 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: injector traction, chain tension, 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: pump controller, pump regulator, Electro-hydraulic control valve, EHC Valve, heavy machinery, solenoid valves, 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, Cat Grader Schematics, 24H Series, Brakes, Caterpillar Hydraulics, Steering, 24M Series, and a whole lot more.

Hydraulic Governor

Updated April, 2018 • 2 Materials

The governor is a critical component in hydroelectric dams.

Learn about: regulate, governor, power, dam, hydraulic, electricity, hydroelectric, 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: Steering, 930E, Split Spool Section, Brakes, Hoist, 830E, 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: Cooling Circuit, Haul Truck, 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: Lift, Bucket, Boom, Loader Schematic, Mobile Equipment Hydraulic, Front-End Loader, Wheel 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: 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: piston compressor, Mobile pneumatics, air governor, 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: Mixing Head, Oilfield, Cement Metering Valve, Cementing, Clumping, Slurry, Dust, and a whole lot more.

Oilfield Pumping

Updated June, 2018 • 6 Materials

Reciprocating plunger pumps are very common in oilfield pumping.

Learn about: Suction Valve, Re-packing, Triplex, Discharge Valve, Quintuplex, High Pressure Pumping, Maintenance, 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, Reeling, Calender, Cradle, Paper Machine, Roll Eject, Winding, 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 and paper, Pulp bale press, 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: low pressure standby, Rail, slip-in cartridge, logic, Pulp and Paper, Car, Dumper, and a whole lot more.

Sawmill

Updated August, 2020 • 4 Materials

Sawmills are full of specialized hydraulic and electrical equipment.

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