By Tokunbo Aregbesola
In many mining operations, maintenance is treated as an unavoidable cost rather than a strategic investment. When production targets are under pressure, preventive maintenance is often the first activity to be postponed. Ironically, this short-term decision usually leads to the very downtime and cost overruns mines are trying to avoid.
From an engineering perspective, mining equipment is designed around predictable wear patterns. Components such as pins, bushings, filters, hoses, GET and seals deteriorate gradually, not suddenly.
Preventive maintenance exists to manage this wear before it escalates into failure. When these early interventions are skipped, minor issues grow into major breakdowns.
One of the most common misconceptions is that preventive maintenance reduces machine availability. In reality, planned downtime is far less disruptive than unplanned failure. A machine stopped for two hours for inspection and lubrication can prevent a hydraulic failure that may keep it offline for days or weeks. In Nigerian mining operations, where spare parts logistics can be slow, this difference is critical.
Preventive maintenance also protects productivity. Machines operating with clean filters, correct lubrication, and properly adjusted systems perform closer to their design capacity. Fuel efficiency improves, cycle times stabilize, and operators can work with confidence. These incremental gains accumulate into significant output improvements over time.
The financial impact is equally compelling. Emergency repairs are always more expensive than scheduled interventions. They often involve secondary damage like contaminated hydraulic systems, overheated engines, or damaged structural components.
Additionally, emergency repairs usually attract premium costs for labor, transport, and parts. Preventive maintenance avoids these cascading expenses.
Local operating conditions make preventive maintenance even more important. Dust, heat, humidity, and variable fuel quality accelerate wear in Nigerian mines. Filters clog faster, lubrication degrades more quickly, and cooling systems operate under constant stress.
Maintenance schedules must reflect these realities rather than rely solely on manufacturer guidelines developed for controlled environments.
Human factors play a significant role. Operators are the first line of defense in preventive maintenance. Simple daily inspections: checking fluid levels, listening for abnormal sounds, observing hose conditions can identify problems early. However, this requires training, accountability, and a culture that values equipment care.
Data-driven maintenance is increasingly accessible. Even basic hour-meter tracking and maintenance logs can transform maintenance planning. Mines that monitor component life and failure trends are better positioned to plan interventions, manage spares, and control costs.
Preventive maintenance is not about perfection; it is about consistency. Small, regular actions protect high-value assets and stabilize operations. Mines that embrace this mindset consistently outperform those that rely on reactive fixes.
Practical Takeaways:
Planned downtime is cheaper than unplanned failure.
Adapt maintenance intervals to local operating conditions.
Train operators to act as frontline equipment inspectors.
Track maintenance data to improve planning.
Treat preventive maintenance as an investment, not a cost.
In mining operation, the cheapest productivity gain often comes not from buying new machines, but from taking better care of the ones you already own.
This is an eye opener not only in the mining industry but in all industries that deal with machines and machinery.
Preventive maintenance is really worth and investment.