Session Listing

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


20 Electrical Sessions

Basic Electrical Concepts

Updated March, 20184 Materials

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

Learn about: Energy Conversion, Ohm's Law, Resistance, Voltage, Ohms, Amps, Work, and a whole lot more.

CAN Bus

Updated December, 20185 Materials

Ready to learn about the CAN Bus Protocol.

Learn about: Cyclic Redundancy Check Field, Non-Return to Zero Inverted, CAN-L, Network, Message Frame, CAN Bus Protocol, Control Field, and a whole lot more.

Connectors

Updated January, 20174 Materials

Welcome to the session on electrical connectors.

Learn about: Connector, Solder Sucker, Solenoid Valve Connector, Weather Pack, Metri-Pack, Jack, Flux, and a whole lot more.

Diodes

Updated July, 20195 Materials

Learn to use your multimeter to test a diode.

Learn about: N-type, Rectifier, Electrical, Light Emitting Diodes, PNP, LED, Flyback, and a whole lot more.

Electrical Hazards & Safety

Updated March, 20183 Materials

Even low voltage systems can seriously injure or even kill.

Learn about: Electrically Insulated Footwear, Hazards, Electrocution, Zero Energy, Electrical Safety, Flame Resistant, Burn, and a whole lot more.

Electrical Measurements

Updated January, 20174 Materials

Digital Multimeters (DMM) are one of the most powerful tools available to electricians.

Learn about: Short Circuit, Test For Blown Fuse, Electrician, Voltage Test, Fluke Meter, DMM, Continuity Test, and a whole lot more.

Flow Sensors

Updated July, 20183 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, Mass Flow Rate, Mag Flow Meter, Magnetic Field, Coriolis, Conductive, MFMS, and a whole lot more.

Fuses & Circuit Breakers

Updated January, 20172 Materials

This mini-session gives you a quick overview of these critical circuit protection devices.

Learn about: Inspecting Fuses, Circuit breaker, Digital Multimeter, Fuse Test, Blown Fuse, Testing Fuses, Fuse, and a whole lot more.

Interpreting Electrical Schematics

Updated January, 20174 Materials

Schematics don't need to be confusing.

Learn about: Wire Crossing, Draft, IES, Symbol, Off-Page, Electrician, NEMA, and a whole lot more.

Open & Short Circuit Faults

Updated April, 20197 Materials

In this session, you'll apply electrical principles to troubleshooting.

Learn about: Hydraulic Loader Fault, Meter Reading, Open Circuit, Skill, Open Circuit Fault, Short Circuit, System Diagnosis, and a whole lot more.

Position Sensors

Updated July, 20189 Materials

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

Learn about: Capacitive, Nominal Range, Through-Beam, Thru-Beam, Sensor, Diffuse, Inductive, and a whole lot more.

Pressure Sensors

Updated July, 201810 Materials

Pressure sensing can be done with one of several kinds of technologies.

Learn about: Wheatstone Bridge, Strain Gauges, Bar, Pressure, psi, Differential, Pascal, and a whole lot more.

Relays

Updated September, 20187 Materials

Relays are demystified in this interactive lesson.

Learn about: Relay, Diagnostic, Throw, System, Schematic Symbol, Troubleshooting, Single Pole Double Throw, and a whole lot more.

Semiconductors

Updated January, 20173 Materials

Transistors are the focus of this session, plus you'll learn how to prevent damage to these sensitive components.

Learn about: Metal Oxide Varistor, Electronics, BJT, Maintenance, Component, Schematic, FET, and a whole lot more.

Sensor Basics

Updated October, 201915 Materials

Sensors are everywhere in our electrical world.

Learn about: Range, Lower Range Value, Live Zero, Transducer, NPN, Transmitter, Normalizing, and a whole lot more.

Series & Parallel Circuit Basics

Updated August, 20199 Materials

Series and parallel circuits are at the heart of every electrical system.

Learn about: Kirchoff's Voltage Law, Electrical Circuit, KVL, Electrician, Series, System Design, Troubleshooting, and a whole lot more.

Starting & Charging Systems

Updated January, 20173 Materials

Dig into mobile electrical circuits with this session on starting and charging systems.

Learn about: Equalizer, Troubleshooting, Starter, 24V, 12V, Battery, Alternator, and a whole lot more.

Switches

Updated July, 201913 Materials

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

Learn about: Double Pole, Throw, Push Button, Switch, Normally Closed, Toggle, Rating, and a whole lot more.

Variable Resistors

Updated January, 20175 Materials

Potentiometers vs.

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

Waveforms & Signal Generation

Updated October, 20188 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: ECM, Electrical Current, Pulse Width Modulation, Sin Wave, AC, Duty Cycle, Alternating Current, and a whole lot more.

23 Hydraulics Sessions

Cartridge Valves

Updated December, 20184 Materials

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

Learn about: damping valves, relief valves, pressure valves, check valves, area ratio, passive control, throttle valves, and a whole lot more.

Counterbalance Valves

Updated September, 20197 Materials

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

Learn about: Safety, Raised Load, Adjusting a Counterbalance Valve, Load Holding, Motion Control, Counterbalance Valve, Runaway Load, and a whole lot more.

Cross-Port Relief Valves

Updated February, 20205 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: Regenerative, Flywheel Mass, Braking Valves, Cross-Port Relief Valves, Overpressure, and a whole lot more.

Electro-Hydraulic Valves

Updated April, 20196 Materials

Enter the world of electro-hydraulic valves in this session.

Learn about: servo valves, electro-hydraulic valves, moog, proportional valves, and a whole lot more.

Fixed & Variable Displacement Pumps

Updated September, 201930 Materials

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

Learn about: Balanced Vane Pump, Internal Gear Pump, Main Gear, Vanes, Slippage, Rotor, External Gear Pump, and a whole lot more.

Flow & Directional Control Valves

Updated March, 202033 Materials

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

Learn about: Center, Pilot, Position, Spool, Master-Slave Valves, Float, Open, and a whole lot more.

Fluid Power Basics

Updated September, 20188 Materials

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

Learn about: Joules Per Second, Laminar Flow, Turbulent Flow, gpm, Flow, Force, Newtons, and a whole lot more.

Hydraulic Accessories

Updated March, 202011 Materials

This session covers a handful of hydraulic accessories.

Learn about: Thread Profile, BSPP, Straight Threads, Quick Couplers, Sleeve, NPT, Screw Pitch, and a whole lot more.

Hydraulic Actuators

Updated September, 201913 Materials

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

Learn about: Semi-Rotary Actuators, Rod End, Troubleshooting, Rod, , Motor, Seal, and a whole lot more.

Hydraulic Hazards & Safety

Updated January, 20173 Materials

Safe working habits around hydraulic systems save lives.

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

Hydraulic Schematic Symbols

Updated August, 201910 Materials

Schematic symbol reading is a vital troubleshooting skill.

Learn about: check valve, detent, ball valve, tank, drafting, manifold line, mechanical linkage, and a whole lot more.

Hydraulic Steering

Updated September, 20196 Materials

This session will go into detail on hydraulic power steering and how it works.

Learn about: steering valve, Hand Metering Unit, power steering, HMU, orbitrol, hydraulic steering, and a whole lot more.

Hydrostatic (Closed Loop) Systems

Updated March, 202017 Materials

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

Learn about: Charge Pump, Cross Port Relief, Heat, Reversing Flow, Pressure Compensated Pump, Hot Oil Shuttle Valve, Direct Linkage, and a whole lot more.

Load Sensing Pumps

Updated March, 202018 Materials

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

Learn about: LS, Equilibrium, Flow Control, Hunting, Margin Pressure, Pressure Differential, Load Sensing Compensator, and a whole lot more.

Open & Closed Center Systems

Updated September, 201910 Materials

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

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

Parallel & Series Systems

Updated March, 202019 Materials

Parallel and Series circuits behave very differently.

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

Positive & Non-Positive Pumping

Updated May, 201816 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, Flooded Inlet, Mechanical Erosion, Charge Pump, Breather, Air, Non Positive Displacement, and a whole lot more.

Pressure & Flow

Updated February, 202024 Materials

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

Learn about: Hydraulic Flow, Gauge, Slippage, Positive Displacement Pump, FPA Triangle, Velocity, Flow Rate, and a whole lot more.

Pressure Reducing Valves

Updated September, 20197 Materials

Pressure reducing valves function very differently than relief valves, even though their schematic symbols look very similar.

Learn about: Pressure, Direct Acting, Normally Closed, Pilot Operated, Downstream Pressure, Pressure Reducing Valve, and a whole lot more.

Pressure Relief Valves

Updated September, 201927 Materials

Jump into relief valves with this colorful session.

Learn about: poppet, limit maximum system pressure, spool, relief pressure, normally closed, external pilot, setting pressure, and a whole lot more.

Sequence Valves

Updated August, 20195 Materials

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

Learn about: Sub-Circuit, Training, Set Pressure, Valve, Hydraulic, Order, Sequence, and a whole lot more.

Troubleshooting Processes

Updated January, 20177 Materials

Troubleshooting a hydraulic system can be a demanding and tricky task.

Learn about: easy-to-check order, Hit or Miss, Guess and Check, Failure, TSTP, Ten Step Troubleshooting Process, Downtime, and a whole lot more.

Unloading Valves

Updated January, 20207 Materials

Unloading valves are often confused with relief valves, but they play a unique role in hydraulic systems.

Learn about: Unloading Valve, Fast Approach Slow Feed Circuit, External Pilot Section, Pressure Pump , Pressure, Energy Saving, Balanced Relief Valve, and a whole lot more.

19 Machinery Sessions

Blast Hole Drills

Updated March, 20183 Materials

This session gets you right into the hydraulic circuit sections in a common blast hole drill.

Learn about: Brakes, Propel, Animation, Blast Hole Drill, Hydraulic Circuit, Drill, Diverter, and a whole lot more.

Cat Excavators

Updated March, 20203 Materials

Familiarize yourself with the inner workings of excavator hydraulic systems that are specific to Caterpillar.

Learn about: 385C, Caterpillar, Track Drive, Swing Circuit, Bucket Circuit, CAT, Boom Circuit, and a whole lot more.

Cat Haul Trucks

Updated May, 20192 Materials

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

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

Coal Stacker-Reclaimer

Updated June, 20182 Materials

Coal stacker-reclaimers are used to either receive coal or to stockpile it.

Learn about: Hoist Circuit, Coal, Stacker, Mining Equipment, Reclaimer, and a whole lot more.

Coiled Tubing Units

Updated September, 20194 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, injector traction, chain tension, hydraulic faults , and a whole lot more.

Concrete Pump

Updated November, 20194 Materials

This session is all about truck-mounted concrete pumps.

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

Deere-Hitachi Excavators & Shovels

Updated March, 202025 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, EHC Valve, pump controller, pump regulator, solenoid valves, Electro-hydraulic control valve, and a whole lot more.

Graders

Updated December, 20195 Materials

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

Learn about: , and a whole lot more.

Hydraulic Governor

Updated April, 20182 Materials

The governor is a critical component in hydroelectric dams.

Learn about: hydroelectric, governor, regulate, electricity, generation, power, engine, and a whole lot more.

Komatsu Haul Trucks

Updated March, 20208 Materials

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

Learn about: Hoist, 830E, Bleeddown Manifold, 930E, Hydraulic, Inlet Section, Brakes, and a whole lot more.

Loaders

Updated February, 20209 Materials

Get to know your way around the hydraulics on a loader with the advanced simulations in this sessions.

Learn about: Shock Valve, Auxiliary, Loader Schematic, Front-End Loader, Boom, Steering, Tilt, and a whole lot more.

Lube Systems

Updated September, 20192 Materials

Keeping bearings and gears lubricated in a production environment often involves a pumped lubricant.

Learn about: Bearings, Lubricant, Simulation, Hydraulic Lube Systems, and a whole lot more.

Mobile Equipment Air Compressors

Updated December, 20194 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, 20181 Material

Oilfield cementing has driven industrial process technology to produce many specialized components, which you'll learn about in this session.

Learn about: Dust, Dry Blending, Cement Metering Valve, Diffuser, Cementing, Mixing Head, Slurry, and a whole lot more.

Oilfield Pumping

Updated June, 20186 Materials

Reciprocating plunger pumps are very common in oilfield pumping.

Learn about: Power End, High Pressure Pumping, Fluid End, Reciprocating Plunger Pump, Quintuplex, Suction Valve, Re-packing, and a whole lot more.

Pulp Bale Presses

Updated April, 20184 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, 20181 Material

Learn through play about a pulp-chip rail car dumper.

Learn about: slip-in cartridge, Car, Rail, logic, Dumper, Pulp and Paper, low pressure standby, and a whole lot more.

Sawmill

Updated September, 20191 Material

Sawmills are full of specialized hydraulic and electrical equipment.

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

Truck Dumper

Updated November, 20181 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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