Construction Plant Mechanic Course

Lesson 1 • Construction Equipment Industry Overview

Introduces the scope of the construction equipment industry and the mechanic's role within it. Establishes context for all subsequent technical training.

Lesson 2 • Equipment Identification and Nomenclature

Teaches how to read model plates, serial numbers, and manufacturer documentation. Accurate identification is essential for parts ordering and service records.

Lesson 3 • Workplace Safety and Personal Protective Equipment

Covers hazard recognition, lockout/tagout procedures, and required protective gear. Safe work habits established here apply throughout the entire course.

Lesson 4 • Shop Tools and Measuring Instruments

Introduces hand tools, power tools, and precision measuring instruments used in equipment service. Proper tool selection and care prevent damage and ensure accurate repairs.

Lesson 1 • Lubrication System Operation

Details oil pump, galleries, filters, and coolers that protect engine components from wear. Proper lubrication maintenance is the single greatest factor in engine longevity.

Lesson 2 • Cylinder Head and Valve Train

Examines head design, valves, camshaft, and timing systems that control gas exchange. Valve timing directly affects power output and fuel efficiency.

Lesson 3 • Cooling System Operation

Covers coolant flow, thermostat, water pump, radiator, and fan systems that manage engine temperature. Overheating is a leading cause of catastrophic engine failure in heavy equipment.

Lesson 4 • Diesel Engine Operating Principles

Explains the four-stroke compression-ignition cycle and how it differs from petrol engines. This theoretical base supports all engine diagnosis and repair tasks.

Lesson 1 • Air Induction and Turbocharging

Covers air filters, intake manifolds, turbochargers, and charge-air coolers that maximise air density. Adequate clean airflow is essential for complete combustion and rated power output.

Lesson 2 • Diesel Fuel Properties and Handling

Covers fuel grades, cetane rating, contamination risks, and proper storage practices. Fuel quality directly impacts injection system life and combustion efficiency.

Lesson 3 • Mechanical Fuel Injection Systems

Covers inline and distributor injection pumps, injector nozzles, and timing adjustment. Mechanical systems remain common on older and mid-range construction equipment.

Lesson 4 • Electronic Fuel Injection Systems

Introduces common-rail and unit-injector systems controlled by electronic control modules. Electronic injection enables precise fuel metering for efficiency and emissions compliance.

Lesson 1 • Hydraulic Pumps and Motors

Covers gear, vane, and piston pump designs along with hydraulic motors that convert fluid power to rotation. Pump selection and condition determine system pressure and flow capacity.

Lesson 2 • Hydraulic Control Valves

Covers directional, pressure-relief, flow-control, and check valves that regulate circuit behaviour. Valve selection and adjustment determine actuator speed, force, and safety.

Lesson 3 • Hydraulic Principles and Fluid Properties

Establishes Pascal's law, flow, pressure, and work concepts that govern all hydraulic systems. Fluid viscosity and cleanliness directly determine system reliability.

Lesson 4 • Hydraulic Circuit Reading and Analysis

Teaches ISO schematic symbols and circuit tracing for open-centre and closed-centre systems. Schematic literacy is the foundation for systematic hydraulic troubleshooting.

Lesson 1 • Electrical Fundamentals for Heavy Equipment

Reviews voltage, current, resistance, and Ohm's law as applied to 12V and 24V equipment systems. A solid electrical foundation is required before diagnosing any electronic fault.

Lesson 2 • Electrical Diagnostics and Test Equipment

Teaches multimeter use, oscilloscope interpretation, and manufacturer diagnostic software for fault isolation. Systematic diagnostic procedures reduce repair time and prevent misdiagnosis.

Lesson 3 • Lighting, Gauges, and Accessory Circuits

Addresses work lights, instrument clusters, switches, relays, and fuse protection in operator cab systems. Proper circuit protection prevents wiring fires and component damage.

Lesson 4 • Starting and Charging Systems

Covers battery types, starter motors, alternators, and voltage regulators that power and recharge equipment electrical systems. Cold-weather starting aids and battery maintenance are emphasised.

Lesson 1 • Final Drives and Undercarriage Systems

Examines planetary final drives, track chains, rollers, and sprockets on crawler equipment. Undercarriage wear accounts for the majority of maintenance costs on tracked machines.

Lesson 2 • Manual and Synchronised Transmissions

Addresses gear selection, synchroniser rings, and shift linkage in manual transmissions used on lighter equipment. Proper synchroniser adjustment prevents gear clash and premature wear.

Lesson 3 • Differentials and Axle Assemblies

Covers bevel gear differentials, limited-slip units, and axle shaft design for wheeled machines. Differential lock engagement and disengagement procedures prevent drivetrain damage.

Lesson 4 • Torque Converters and Fluid Couplings

Explains how torque converters multiply torque and provide smooth power transfer from the engine. Stall speed and lockup clutch operation affect machine productivity and fuel use.

Lesson 1 • Pre-Operation and Walkaround Inspections

Teaches structured walkaround inspection sequences that identify defects before operation begins. Early defect detection prevents minor issues from becoming costly failures.

Lesson 2 • Greasing and Lubrication Points

Identifies all grease fittings, lubrication intervals, and correct grease specifications for each application. Missed lubrication points are a leading cause of pin, bushing, and bearing failure.

Lesson 3 • Maintenance Planning and Scheduling

Covers service interval systems, maintenance management software, and work order creation. Planned maintenance reduces total ownership cost and extends machine service life.

Lesson 4 • Fluid and Filter Service Procedures

Details engine oil, hydraulic fluid, coolant, and transmission fluid change procedures with correct filter replacement. Contaminated or degraded fluids are the primary cause of premature component failure.

Lesson 1 • Systematic Diagnostic Methodology

Establishes a structured six-step diagnostic process applicable to any system on any machine. Consistent methodology reduces diagnostic time and prevents unnecessary parts replacement.

Lesson 2 • Transmission and Drivetrain Overhaul

Details disassembly, inspection, bearing replacement, and reassembly of transmissions and final drives. Correct bearing preload and clutch pack clearance are critical for post-overhaul reliability.

Lesson 3 • Hydraulic System Diagnostics and Testing

Applies flow meters, pressure gauges, and thermal imaging to isolate hydraulic efficiency losses. Quantitative testing distinguishes pump wear from valve faults and cylinder bypass.

Lesson 4 • Engine Performance Testing and Overhaul

Covers compression testing, blowby measurement, and full engine teardown and rebuild procedures. Overhaul decisions are based on measured wear data compared to manufacturer specifications.