Lesson 1Function and operation of hydraulic pumps (gear, vane, piston)Introduces gear, vane, and piston pumps, their working principles, efficiency, displacement control, common failure modes, spotting wear signs, and scheduling preventive maintenance to ensure long pump life.
External and internal gear pumpsVane pump operation and featuresAxial and radial piston pumpsFixed versus variable displacementCommon pump wear and noise signsLesson 2Hydraulic filters: types, micron ratings, and installation locationsCovers hydraulic filter types, micron ratings, beta ratios, selecting and placing filters in suction, pressure, and return lines to manage contamination and safeguard pumps, valves, and actuators effectively.
Suction, pressure, and return filtersMicron rating and beta ratio basicsFilter media types and dirt holdingChoosing filter locations in circuitsMonitoring clogging and changeoutLesson 3Directional, pressure, and flow control valves: operation and common wear patternsExplains directional, pressure, and flow control valves, their internal workings, symbols, typical wear issues, and how valve health affects motion control, power consumption, and overall system stability.
Spool and poppet directional valvesRelief, reducing, and sequence valvesFlow control and throttle valvesValve symbols and port functionsErosion, sticking, and leakage wearLesson 4Auxiliary components: pressure gauges, coolers, accumulators, and valvesDiscusses auxiliary parts like gauges, coolers, accumulators, check valves, their roles, sizing guidelines, and contribution to safe running, fault diagnosis, and energy savings in hydraulic setups.
Pressure and temperature gaugesAir and water oil coolersBladder and piston accumulatorsCheck and counterbalance valvesSafety devices and relief pathsLesson 5Hoses, fittings, and piping: materials, pressure classes, and failure modesExamines hoses, fittings, rigid piping in hydraulic systems, material selection, pressure ratings, proper routing, and frequent failure causes affecting safety, leaks, and maintenance schedules.
Hose constructions and standardsFitting types and sealing methodsPipe and tube materials and ratingsRouting, clamping, and bend radiusBurst, abrasion, and fatigue failuresLesson 6Reservoir design, breathers, and oil managementAddresses reservoir sizing, internal design, breather choice, oil level checks, contamination control, and heat management to prolong fluid life and shield delicate hydraulic parts.
Reservoir sizing and dwell timeInternal baffles and return arrangementsBreather types and filtration levelsOil level monitoring and alarmsMoisture and air ingress controlLesson 7Overview of closed-loop and open-loop hydraulic systemsCompares open-loop and closed-loop systems, circuit designs, control traits, efficiency, applications, and how each type influences fault-finding and upkeep in industrial use.
Basic open-loop circuit layoutBasic closed-loop circuit layoutEnergy efficiency and heat generationControl accuracy and responseMaintenance and failure tendenciesLesson 8Typical operating parameters: pressure ranges, temperatures, and flow rates for industrial presses (reference values and sources)Outlines standard pressure, temperature, flow ranges for hydraulic presses, reading data sheets, using norms to confirm safe, efficient running conditions in factory operations.
Typical system and peak pressure rangesNormal and extreme oil temperature limitsCommon pump and actuator flow rangesReading OEM and ISO data sheetsUsing safety factors in sizingLesson 9Cylinders and actuators: rod, seals, cushions, and mounting considerationsDetails hydraulic cylinders and actuators, rod design, seals, cushions, mounting options, and their effects on load handling, motion control, leak prevention, and durability.
Cylinder types and basic constructionRod materials, coatings, and finishesSeal types, functions, and failure signsCushion design and adjustment methodsMounting styles and alignment issues
