Heavy Equipment Maintenance & Inspection Course

Lesson 1 • Core Machine Systems and Components

Introduces the primary systems found across machine families: powertrain, hydraulics, electrical, and structures. Provides the component framework used throughout the course.

Lesson 2 • Maintenance Roles and Responsibilities

Defines operator, field technician, and shop technician duties within a maintenance programme. Clarifies accountability boundaries for inspection and repair tasks.

Lesson 3 • Technical Documentation and Manuals

Teaches navigation of operator manuals, service manuals, and parts catalogues. Accurate document use is foundational to every inspection and repair procedure.

Lesson 4 • Major Machine Families and Configurations

Identifies earthmoving, lifting, paving, and material-handling machines by design and function. Builds vocabulary for all subsequent maintenance topics.

Lesson 1 • Hazard Identification and Risk Assessment

Trains systematic identification of mechanical, electrical, chemical, and environmental hazards. Risk assessment skills underpin every safe maintenance decision.

Lesson 2 • Safe Work Positioning and Ergonomics

Teaches safe access, egress, and body positioning when working on large machines. Reduces musculoskeletal injury risk during inspection and repair tasks.

Lesson 3 • Lockout/Tagout and Energy Isolation

Explains stored-energy sources and the step-by-step lockout/tagout procedure for heavy equipment. Prevents accidental energisation during maintenance.

Lesson 4 • Fire Prevention and Chemical Safety

Addresses flammable fluids, battery gases, and chemical exposure risks common in equipment maintenance. Students select correct extinguisher types and read safety data sheets.

Lesson 1 • Systematic Inspection Methodology

Introduces zone-based and system-based inspection sequences to ensure complete coverage. Consistent methodology eliminates the random omissions that cause field failures.

Lesson 2 • Inspection Types and Frequencies

Differentiates pre-shift, periodic, and annual inspection types and their triggering criteria. Matching inspection type to equipment use prevents missed defects.

Lesson 3 • Digital Inspection Tools and Software

Introduces tablet-based inspection apps, barcode scanning, and cloud-based record storage. Digital tools improve accuracy and enable real-time data sharing with maintenance planners.

Lesson 4 • Condition Assessment and Rating Standards

Teaches quantitative and qualitative condition-rating scales for wear, cracks, leaks, and corrosion. Standardised ratings enable consistent communication across maintenance teams.

Lesson 1 • Diesel Engine Operating Principles

Reviews four-stroke diesel combustion, turbocharging, and aftertreatment fundamentals. Engine theory informs correct diagnosis of performance and fluid condition issues.

Lesson 2 • Air Induction and Exhaust Inspection

Covers air filter restriction monitoring, intake duct integrity, and exhaust system leak detection. Restricted airflow and exhaust leaks degrade performance and increase emissions.

Lesson 3 • Engine Oil and Filter Service

Covers oil viscosity selection, drain interval determination, and filter replacement procedures. Correct oil service is the single highest-impact PM task for engine longevity.

Lesson 4 • Fuel System Inspection and Service

Addresses fuel quality, water separator service, primary and secondary filter replacement, and injector cleanliness. Fuel system integrity directly affects power output and emissions.

Lesson 1 • Hydraulic Fluid Management

Covers fluid specification selection, contamination control, sampling, and reservoir service. Fluid cleanliness is the primary driver of hydraulic component life.

Lesson 2 • Hydraulic Cylinder Inspection

Addresses rod scoring, seal leakage, barrel damage, and pin and bushing wear in hydraulic cylinders. Cylinder condition directly affects machine lifting and digging capacity.

Lesson 3 • Hose, Fitting, and Seal Inspection

Teaches visual and tactile inspection of hoses, fittings, O-rings, and seals for wear, abrasion, and leakage. Hose failures are a primary cause of hydraulic system fires.

Lesson 4 • Pump and Motor Health Assessment

Introduces case drain flow testing, noise analysis, and pressure testing to evaluate pump and motor condition. Early pump degradation detection prevents catastrophic system contamination.

Lesson 1 • Electrical Safety and Basic Circuit Theory

Reviews voltage, current, resistance, and Ohm's law in the context of heavy equipment 12V and 24V systems. Safe electrical work practices are established before any live testing.

Lesson 2 • Wiring Harness and Connector Inspection

Teaches inspection of harnesses for chafing, corrosion, and improper routing, and connector pin inspection. Harness integrity prevents intermittent faults that are difficult to diagnose.

Lesson 3 • Battery and Charging System Service

Covers battery load testing, electrolyte inspection, terminal cleaning, and alternator output verification. Battery and charging faults are the most frequent electrical failures on job sites.

Lesson 4 • Sensor and Actuator Diagnostics

Introduces pressure, temperature, and position sensor testing using a digital multimeter and wiring diagrams. Sensor faults generate fault codes that guide systematic diagnosis.

Lesson 1 • Axle, Differential, and Final Drive Service

Teaches oil level checks, seal inspection, and backlash measurement for axles, differentials, and final drives. Lubrication failures in these components cause rapid and costly damage.

Lesson 2 • Transmission and Torque Converter Inspection

Covers transmission fluid sampling, filter service, clutch pack wear indicators, and torque converter stall testing. Transmission health determines machine productivity and shift quality.

Lesson 3 • Track and Undercarriage Inspection

Covers track sag measurement, sprocket and idler wear, roller inspection, and track link pitch measurement. Undercarriage represents up to 50% of crawler machine operating costs.

Lesson 4 • Structural and Frame Integrity Inspection

Introduces visual and dye-penetrant crack detection on frames, booms, and buckets, plus weld quality assessment. Structural defects create catastrophic failure risk if not identified early.

Lesson 1 • PM Programme Design and Scheduling

Covers interval-based and meter-based PM scheduling, task grouping, and resource allocation. A well-designed schedule maximises uptime while minimising technician travel and parts cost.

Lesson 2 • PM Task Execution and Quality Control

Addresses task sequencing, torque specification compliance, fluid fill verification, and post-PM functional checks. Consistent execution quality determines whether PM delivers its intended benefits.

Lesson 3 • Fluid Analysis Programme Management

Teaches oil, coolant, and hydraulic fluid sampling protocols, lab report interpretation, and corrective action triggers. Fluid analysis extends component life and reduces unplanned failures.

Lesson 4 • Parts and Consumables Management

Covers parts identification, kitting for PM events, storage conditions, and counterfeit parts recognition. Correct parts availability prevents PM delays and ensures specification compliance.