Lesson 1Function and operation of hydraulic pumps (gear, vane, piston)Learn about gear, vane, and piston pumps, their working methods, efficiency levels, flow adjustments, and common breakdowns, including tips on spotting wear signs and scheduling routine checks to prevent failures.
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 locationsUnderstand types of hydraulic filters, their micron sizes, and efficiency measures, and discover how to choose and place them in intake, high-pressure, and return lines to manage dirt and safeguard pumps, valves, and movers.
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 patternsExamine directional, pressure, and flow control valves, their inner workings, diagrams, and usual wear signs, and see how valve health impacts movement precision, power consumption, and overall system steadiness.
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 valvesReview supporting hydraulic parts like gauges, cooling units, energy storage devices, and one-way valves, their roles, basic sizing, and contributions to secure running, fault finding, and better energy use in systems.
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 modesStudy flexible hoses, connectors, and fixed pipes in hydraulic setups, highlighting material options, pressure limits, installation routes, and frequent failure types that affect safety, fluid loss, and repair timings.
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 managementDiscuss tank sizing, inner structure, and air vent choices, plus fluid level monitoring, dirt avoidance, and heat control methods that prolong oil usability and shield delicate hydraulic elements from harm.
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 systemsCompare open and closed hydraulic circuits, their designs, control responses, efficiency rates, and common uses, stressing how each setup influences problem-solving and upkeep duties in practical scenarios.
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)Outline standard pressure, heat, and flow limits for factory presses, guide on reading technical sheets, and demonstrate using approved norms to confirm safe and effective running conditions in Eritrean plants.
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 considerationsDescribe hydraulic cylinders and movers, focusing on rod construction, sealing setups, shock absorbers, and attachment methods, and how these affect load handling, motion accuracy, leak risks, and durability.
Cylinder types and basic constructionRod materials, coatings, and finishesSeal types, functions, and failure signsCushion design and adjustment methodsMounting styles and alignment issues
