Session Listing

A complete list of all the subjects we cover.

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20 Electrical Sessions

Basic Electrical Concepts

Updated May, 2021 • 4 Materials

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

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

CAN Bus

Updated December, 2018 • 5 Materials

Ready to learn about the CAN Bus Protocol.

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

Connectors

Updated January, 2017 • 4 Materials

Welcome to the session on electrical connectors.

Learn about: Weather Pack, Screw, Data, Solder, Coaxial, Wick, Soldering Iron, and a whole lot more.

Diodes

Updated July, 2019 • 5 Materials

Learn to use your multimeter to test a diode.

Learn about: P-type, N-type, PNP, Troubleshooting, Light Emitting Diodes, LED, Bias, 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: Static Dissipative Footwear, Zero Energy, Electrical PPE, Electrocution, Hazards, Burn, Electrically Insulated 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: DMM, Short Circuit, Fluke Meter, Continuity Test, Test For Blown Fuse, Current Test, Measurement, 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, Density, Flow, Rate, Coriolis, Electromagnetic Flow Meter, 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: Slow blow fuse, Fast acting fuse, Electrical Circuit Protection, Circuit breaker, Testing Fuses, Blown Fuse, Fuse, and a whole lot more.

Interpreting Electrical Schematics

Updated January, 2017 • 4 Materials

Schematics don't need to be confusing.

Learn about: Schematic, Off-Page, Chassis Ground, Signal Ground, Connection, NEMA, Electrician, 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: Meter Reading, Hydraulic Loader Fault, Ten Step Troubleshooting Process, Skill, Electrician, System Diagnosis, Short Circuit Fault, and a whole lot more.

Position Sensors

Updated May, 2021 • 14 Materials

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

Learn about: Inductive, Proximity, Hall, Capacitive, Ultrasonic, Magnetostrictive, Retroreflective, 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, Gauge, Piezoelectric Sensors, psi, Manometer, Pressure Sensor, Bourdon Tube Gauge, and a whole lot more.

Relays

Updated September, 2018 • 7 Materials

Relays are demystified in this interactive lesson.

Learn about: Switch, Troubleshooting, Schematic Symbol, Electrical Circuit, System, Diagnostic, Relay, 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: Electrical, BJT, FET, Schematic, Troubleshooting, Electronics, Transistor, and a whole lot more.

Sensor Basics

Updated October, 2019 • 15 Materials

Sensors are everywhere in our electrical world.

Learn about: Range, Transducer, Sensor, NPN, Sourcing, Normalizing, 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: Parallel, Electrical Circuit, Kirchoff's Voltage Law, Industrial Maintenance, Series, KVL, Electrician, 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, Starter, Alternator, Electrical, Troubleshooting, Battery, 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: Three Way Switching, Normally Closed, Switch, Double Pole, Normally Open, Selector, Control, and a whole lot more.

Variable Resistors

Updated January, 2017 • 5 Materials

Potentiometers vs.

Learn about: AC temperature control, Rheostat, Variable Resistor, Potentiometer, Resistance, 2 lead, wiper, 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: Resistance, Hertz, Digital Control, ECM, Alternating Current, Control Voltage, Amps, 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, poppet, area ratio, relief valves, throttle valves, pressure valves, hydraulics, and a whole lot more.

Counterbalance Valves

Updated July, 2021 • 9 Materials

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

Learn about: Counterbalance Valve, Adjusting a Counterbalance Valve, Runaway Load, Motion Control, Raised Load, Safety, Load Holding, 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, Cross-Port Relief Valves, Overpressure, Braking 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: moog, electro-hydraulic valves, servo valves, proportional valves, and a whole lot more.

Fixed & Variable Displacement Pumps

Updated February, 2021 • 35 Materials

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

Learn about: Pressure Differential, Cam Ring, Variable Displacement, Volumetric Efficiency, Gear Pump, Off-Stroke, Crescent Seal Pump, and a whole lot more.

Flow & Directional Control Valves

Updated January, 2021 • 36 Materials

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

Learn about: Choke, Lands, Response, Master-Slave Valves, Three Section Valves, DCV, TSTP, and a whole lot more.

Fluid Power Basics

Updated May, 2021 • 8 Materials

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

Learn about: Force = Pressure x Area, Power, Rotational Force, gpm, Energy, Newtons, Turbulent Flow, and a whole lot more.

Hydraulic Accessories

Updated May, 2021 • 12 Materials

This session covers a handful of hydraulic accessories.

Learn about: Diameter, ISO 4406, Piston, Female, Metric Parallel, NPTF, Dynamic Threads, and a whole lot more.

Hydraulic Actuators

Updated June, 2021 • 16 Materials

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

Learn about: , Rod, Gland, Rod End, Seal, Motor, Blind End, and a whole lot more.

Hydraulic Hazards & Safety

Updated January, 2017 • 3 Materials

Safe working habits around hydraulic systems save lives.

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

Hydraulic Schematic Symbols

Updated October, 2020 • 10 Materials

Schematic symbol reading is a vital troubleshooting skill.

Learn about: orifice, detent, accumulator, flow control, check valve, shuttle valve, spring, 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: power steering, steering valve, HMU, Hand Metering Unit, orbitrol, hydraulic steering, and a whole lot more.

Hydrostatic (Closed Loop) Systems

Updated June, 2021 • 19 Materials

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

Learn about: Direct Linkage, Servo, Charge Pump, Pressure Compensated Pump, Heat, Cross Port Relief, Hot Loop, 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: Piston Pump, Load Sensing Compensator, Orifice, LS, Margin Pressure, Hunting, Flow Control, and a whole lot more.

Open & Closed Center Systems

Updated July, 2020 • 13 Materials

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

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

Parallel & Series Systems

Updated March, 2020 • 24 Materials

Parallel and Series circuits behave very differently.

Learn about: Parallel Circuits, Pressure Drops, Load, System Pressure, Series Circuits, Restriction, 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: Hydraulic Control, Manual Pilot Control, Control Stick, Pilot Controllers, Joysticks, Pilot Valve, and a whole lot more.

Positive & Non-Positive Pumping

Updated August, 2020 • 20 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: Starved Inlet, Restriction, Positive Pressure, Aeration, Positive Displacement, Void Bubbles, Non Positive Displacement, and a whole lot more.

Pressure & Flow

Updated February, 2020 • 28 Materials

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

Learn about: Flow Rate, Fluid Velocity, Slippage, FPA Triangle, Gauge, Hydraulic Flow, Positive Displacement Pump, 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, Normally Closed, Pressure Reducing Valve, Pilot Operated, Downstream Pressure, Direct Acting, and a whole lot more.

Pressure Relief Valves

Updated March, 2021 • 31 Materials

Jump into relief valves with this colorful session.

Learn about: normally closed, spring, normally open, pressure override, cartridge, direct acting relief, pressure spikes, 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: Valve, Pressure, Hydraulic, Sequence, Set Pressure, Order, 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: Failure, TSTP, Ten Step Troubleshooting Process, Downtime, Guess and Check, Hit or Miss, easy-to-check order, 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: Unloading Valve, External Pilot Section, Balanced Relief Valve, Energy Saving, Volume Pump, High-Low Circuit, Pressure Pump , and a whole lot more.

19 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: Aerial Work Platform, Mobile Elevated Work Platform, Slab Scissor Lift, Scissor Lift Hydraulics, AWP, MEWP, 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: Hydraulic Circuit, Holdback, Diverter, Propel, Drill, Animation, Brakes, 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: Guillotine Gate, Cement Mixer, Cement Plant, Cement, 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, Reclaimer, Mining Equipment, 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: Coil tubing injector, injector traction, coiled tubing, chain tension, hydraulic faults , and a whole lot more.

Concrete Pump

Updated November, 2019 • 4 Materials

This session is all about truck-mounted concrete pumps.

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

Dozers

Updated July, 2021 • 4 Materials

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

Excavators & Shovels

Updated June, 2021 • 26 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: Caterpillar, Boom Circuit, Excavator, Swing Circuit, 385C, Track Drive, 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, 24H Series, Cat Grader Schematics, Brakes, 24M Series, Steering, Caterpillar Hydraulics, and a whole lot more.

Hydraulic Governor

Updated April, 2018 • 2 Materials

The governor is a critical component in hydroelectric dams.

Learn about: engine, hydraulic, governor, electricity, regulate, dam, power, 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: Wheel Loader, Shock Valve, Bucket, Boom, Mobile Equipment Hydraulic, Loader Schematic, Lift, 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: Lubricant, Hydraulic Lube Systems, Simulation, Bearings, and a whole lot more.

Mining Haul Trucks

Updated July, 2021 • 14 Materials

Haul trucks from three major manufacturers are covered in this session.

Learn about: Komatsu, Liebherr, Live Schematic Simulation, 3D Video, Caterpillar, 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: Slurry, Dust, Cement Metering Valve, Air Entrainment, Oilfield, Mixing Head, Dry Blending, 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, Positive Displacement Pumping, Suction Valve, Power End, Re-packing, Maintenance, Packing, and a whole lot more.

Paper Machine Reels & Winders

Updated July, 2021 • 7 Materials

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

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

Pulp Mill Machinery

Updated July, 2021 • 11 Materials

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

Learn about: low pressure standby, Valve Solenoid Sequence Chart, pulp and paper, wire drive, Dumper, logic, Pulp bale press, and a whole lot more.

Sawmill

Updated August, 2020 • 4 Materials

Sawmills are full of specialized hydraulic and electrical equipment.

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

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