Session Listing

Here is a complete list of all the subjects we cover.

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

CAN Bus

Updated December, 2018 • 5 Materials

Ready to learn about the CAN Bus Protocol.

Learn about: CAN-H, Controller, Arbitration, Message Identifier, Extended CAN, Safety Field, Non-Return to Zero Inverted, and a whole lot more.

Connectors

Updated January, 2017 • 4 Materials

Welcome to the session on electrical connectors.

Learn about: Maintenance, Data, Metri-Pack, Crimp, Deutsch, Connector, Solder Sucker, and a whole lot more.

Diodes

Updated July, 2019 • 5 Materials

Learn to use your multimeter to test a diode.

Learn about: Semiconductor, PNP, Troubleshooting, P-type, LED, Multimeter, NPN, 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: Zero Energy, Flame Resistant, Burn, Hazards, Electrical PPE, , 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: Digital Multimeter, Fluke Meter, Electrician, Resistance Test, Open Circuit, Continuity Test, 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: MFMS, Electromagnetic Flow Meter, Magnetic Field, Electrodes, Rate, Mass Flow Measuring System, 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: Digital Multimeter, Blown Fuse, Short Circuit, Slow blow fuse, Electrical Circuit Protection, Inspecting Fuses, Circuit breaker, and a whole lot more.

Interpreting Electrical Schematics

Updated January, 2017 • 4 Materials

Schematics don't need to be confusing.

Learn about: Bus, Layout, NEMA, Symbol, Troubleshooting, Electrical Schematic, Tag, 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: Hydraulic Loader Fault, Electrical Fault, Troubleshooting, Short Circuit Fault, Digital Multimeter, Skill, System Diagnosis, 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: Ultrasonic, Capacitive, Thru-Beam, Proximity, Retroreflective, Inductive, 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: Absolute Pressure, Gauge Pressure, psia, Indicator Fluids, Pressure Sensor, Bar, Differential, and a whole lot more.

Relays

Updated September, 2018 • 7 Materials

Relays are demystified in this interactive lesson.

Learn about: Troubleshooting, Diagnostic, Schematic Symbol, Single Pole Double Throw, Relay, Switch, 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: Electrical, Transistor, Schematic, Metal Oxide Varistor, JFET, MOV, Semiconductor, and a whole lot more.

Sensor Basics

Updated October, 2019 • 15 Materials

Sensors are everywhere in our electrical world.

Learn about: Sourcing, Transducer, Calibration, Transmitter, NPN, Lower Range Value, Range, 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, Electrical Circuit, System Design, Parallel, Series, Troubleshooting, 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, Alternator, Battery, Equalizer, Starter, 12V, Troubleshooting, 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: On-Off-On, Pole, Selector, Normally Closed, Double Pole, N.C., Switch, and a whole lot more.

Variable Resistors

Updated January, 2017 • 5 Materials

Potentiometers vs.

Learn about: Rheostat, 2 lead, AC temperature control, Potentiometer, Resistance, Variable Resistor, 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: Direct Current, Frequency, Analog Control, PWM, Electrical Current, Resistance, Hertz, and a whole lot more.

24 Hydraulics Sessions

Cartridge Valves

Updated December, 2018 • 4 Materials

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

Learn about: poppet, damping valves, pressure valves, hydraulics, valve cover plate, throttle valves, relief 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: Motion Control, Load Holding, Runaway Load, Adjusting a Counterbalance Valve, Raised Load, Safety, Counterbalance Valve, 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: Overpressure, Flywheel Mass, Cross-Port Relief Valves, 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: servo valves, proportional valves, electro-hydraulic 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: Swash Plate, Main Gear, Volumetric Efficiency, Pressure Differential, Driven Gear, Internal Gear Pump, Crescent Seal Pump, and a whole lot more.

Flow & Directional Control Valves

Updated March, 2020 • 33 Materials

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

Learn about: DCV, 2-Stage Valves, Choke, Operator, Open, Float, Lands, 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: Turbulent Flow, Bernoulli's Principle, Heat, Newtons, Static Pressure, Pascal's Law, Pressure, and a whole lot more.

Hydraulic Accessories

Updated June, 2020 • 11 Materials

This session covers a handful of hydraulic accessories.

Learn about: Fittings, Dynamic Threads, Length, Filters, International, Poppet, Threads, 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: Semi-Rotary Actuators, Linear Actuator, Troubleshooting, Rod End, Cylinder, Blind End, Seal, and a whole lot more.

Hydraulic Hazards & Safety

Updated January, 2017 • 3 Materials

Safe working habits around hydraulic systems save lives.

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

Hydraulic Schematic Symbols

Updated August, 2019 • 10 Materials

Schematic symbol reading is a vital troubleshooting skill.

Learn about: drain line, spring, detent, solenoid, orifice, electrical line, check valve, 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, power steering, orbitrol, hydraulic steering, and a whole lot more.

Hydrostatic (Closed Loop) Systems

Updated June, 2020 • 17 Materials

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

Learn about: Hot Loop, Closed Loop, Hydrostatic Loop, Hot Oil Shuttle Valve, Servo, Direct Linkage, Reversing Flow, and a whole lot more.

Load Sensing Pumps

Updated June, 2020 • 17 Materials

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

Learn about: Flow Control, Load Sense, Load Sensing Compensator, Margin Pressure, Piston Pump, Equilibrium, Hunting, and a whole lot more.

Open & Closed Center Systems

Updated May, 2020 • 10 Materials

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

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

Parallel & Series Systems

Updated March, 2020 • 19 Materials

Parallel and Series circuits behave very differently.

Learn about: System Pressure, Pressure Drops, Series Circuits, Branch, Path of Least Resistance, Restriction, Load, 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: , and a whole lot more.

Positive & Non-Positive Pumping

Updated April, 2020 • 16 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, Cavitation, Breather, Starved Inlet, Net Positive Suction Head, Restriction, Charge Pump, 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, Hydraulic Flow, Positive Displacement Pump, Fluid Velocity, Velocity, Resistance, FPA Triangle, 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, Pilot Operated, Pressure Reducing Valve, Direct Acting, Normally Closed, and a whole lot more.

Pressure Relief Valves

Updated May, 2020 • 28 Materials

Jump into relief valves with this colorful session.

Learn about: direct acting relief, spring, pressure override, normally closed, pressure spikes, counterbalance valves, normally open, 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: Training, Order, Hydraulic, Valve, Set Pressure, Sub-Circuit, 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: TSTP, Downtime, Guess and Check, easy-to-check order, Hit or Miss, Failure, 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: High-Low Circuit, Balanced Relief Valve, Energy Saving, Efficient, External Pilot Section, Fast Approach Slow Feed Circuit, Restriction, and a whole lot more.

20 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: Scissor Lift Hydraulics, Aerial Work Platform, AWP, Mobile Elevated Work Platform, MEWP, 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, Propel, Blast Hole Drill, Holdback, Brakes, Diverter, 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: Boom Circuit, Excavator, Bucket Circuit, 385C, CAT, Swing Circuit, 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: Simulations, Steering Circuit, Haul Truck, Hoist 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: Mining Equipment, Reclaimer, Coal, Hoist Circuit, Stacker, and a whole lot more.

Coiled Tubing Units

Updated September, 2019 • 4 Materials

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

Learn about: coiled tubing, Coil tubing injector, hydraulic faults , chain tension, 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: concrete, duplex plunger pump, truck, cement, 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 regulator, solenoid valves, Electro-hydraulic control valve, heavy machinery, EHC Valve, pump controller, and a whole lot more.

Graders

Updated June, 2020 • 6 Materials

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

Learn about: , 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, generation, engine, electricity, dam, and a whole lot more.

Komatsu Haul Trucks

Updated May, 2020 • 8 Materials

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

Learn about: 930E, Hydraulic, Bleeddown Manifold, Hoist, Inlet Section, Split Spool Section, Komatsu, 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: Steering, Front-End Loader, Lift, Loader Schematic, Tilt, Boom, Auxiliary, 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, Hydraulic Lube Systems, Lubricant, 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: Mobile pneumatics, air governor, piston compressor, 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, Air Entrainment, Oilfield, Diffuser, Dust, Cement Metering Valve, 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: Maintenance, Packing, Quintuplex, Fluid End, High Pressure Pumping, Suction Valve, Re-packing, and a whole lot more.

Pulp Bale Presses

Updated July, 2020 • 4 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: Pulp and Paper, Rail, low pressure standby, logic, Car, slip-in cartridge, Dumper, and a whole lot more.

Sawmill

Updated June, 2020 • 1 Material

Sawmills are full of specialized hydraulic and electrical equipment.

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

Truck Dumper

Updated November, 2018 • 1 Material

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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