Mining Equipment
Maintenance Services in Ghana

Planned preventive maintenance, corrective repairs, and major component overhauls for
excavators, drill rigs, and haul trucks.
Equipment availability is the hidden determinant of mining productivity. Ore reserves do not generate revenue; processed ore does , and processed ore requires functioning equipment at every step of the production chain from the drill to the plant. When a primary excavator goes down unplanned, the entire production cycle stalls. When haul trucks queue because dump body hydraulics have failed, fuel burns and payload targets fall behind. When a drill rig is out of service, the blast does not happen, the excavator has no face to work, and the shortfall compounds backward through the weekly production schedule.
Minerra Ghana Limited provides professional mining equipment maintenance services that protect equipment availability, reduce the frequency and duration of unplanned stoppages, extend asset lifecycle, and ultimately reduce the total cost of maintaining a mining fleet. Our maintenance scope covers excavators, drill rigs, and dump trucks , the core production equipment of open pit mining operations , and extends to mining infrastructure including haul roads, sumps, drainage structures, and ancillary site plant.

The Real Cost of Inadequate Maintenance

Most mining operators track direct maintenance costs carefully. Fewer track the indirect costs of inadequate maintenance with the same rigour , and those indirect costs are typically larger.

An excavator with a mechanical availability of 75% instead of 90% is, in practical terms, one-sixth less productive than a well-maintained machine. Over a month of two-shift operation, that gap represents hundreds of hours of lost production. At any meaningful gold price, the revenue impact of that lost production dwarfs the additional maintenance investment required to achieve the higher availability figure.

Beyond lost production, deferred maintenance accelerates component wear and increases the probability of major failures , engine overhauls, transmission replacements, final drive failures, hydraulic pump replacements , that cost multiples of what early intervention would have required. A maintenance philosophy that treats servicing as a cost to minimise rather than an investment to optimise consistently produces higher total lifecycle costs and lower fleet availability than one built around structured preventive intervention.
Minerra Ghana’s maintenance service is built on the second philosophy, not the first.

Our Mining Equipment Maintenance Services

Planned Preventive Maintenance (PPM)

A structured, schedule-driven maintenance programme aligned to OEM service intervals and the actual operating conditions of each machine. Minerra Ghana’s PPM system covers all fluid and filter changes, lubrication service, system pressure and temperature checks, hose and fitting condition inspection, fastener torque verification, and safety system function tests.

Service intervals are tracked by machine operating hours , recorded from hourmeter readings at every shift change , and by calendar where applicable. Approaching service interventions are flagged in advance so that parts, fluids, and technician time can be scheduled without disrupting production unnecessarily. PPM records are maintained for every machine and are available for client review. For international operators with contractor audit obligations, our maintenance records demonstrate the service history and current condition of the equipment on their site.

Corrective and Breakdown Maintenance

Rapid diagnosis and repair of mechanical, hydraulic, electrical, and structural faults. When a breakdown occurs on a Minerra Ghana-maintained fleet, our response priority is minimising downtime. This means on-site technicians with the diagnostic skills and the component inventory to fix the majority of common failure modes without waiting for parts to arrive from Accra or overseas suppliers.

Our technicians are trained to apply structured fault diagnosis , reading system pressures, checking sensor outputs, interpreting fault codes , rather than replacing components speculatively. Correct first-time diagnosis reduces mean time to repair, controls parts consumption, and avoids the compounding damage that results from misdiagnosis.

Every breakdown is recorded in our maintenance system with the fault description, diagnosis method, repair carried out, parts consumed, and downtime duration. This data feeds our failure pattern analysis and preventive maintenance review process.

Corrective and Breakdown Maintenance

Rapid diagnosis and repair of mechanical, hydraulic, electrical, and structural faults. When a breakdown occurs on a Minerra Ghana-maintained fleet, our response priority is minimising downtime. This means on-site technicians with the diagnostic skills and the component inventory to fix the majority of common failure modes without waiting for parts to arrive from Accra or overseas suppliers.

Our technicians are trained to apply structured fault diagnosis , reading system pressures, checking sensor outputs, interpreting fault codes , rather than replacing components speculatively. Correct first-time diagnosis reduces mean time to repair, controls parts consumption, and avoids the compounding damage that results from misdiagnosis.

Every breakdown is recorded in our maintenance system with the fault description, diagnosis method, repair carried out, parts consumed, and downtime duration. This data feeds our failure pattern analysis and preventive maintenance review process.

Major Component Overhaul and Rebuild

Scheduled replacement and rebuild of major powertrain components at the end of their service life , engine replacements, transmission overhauls, final drive rebuilds, hydraulic pump and motor refurbishment, and structural repairs. Major component work is planned well in advance of expected end-of-life based on operating hour tracking and condition monitoring data, minimising unplanned major failure and its associated production impact.

For clients managing owned equipment that has not been maintained to a structured programme, Minerra Ghana can conduct a comprehensive fleet condition assessment , establishing the current maintenance status of each machine and developing a prioritised intervention plan to bring the fleet back to a reliable operating condition.

Undercarriage and Ground Engaging Tools (GET) Management

Undercarriage wear track shoes, link assemblies, rollers, idlers, and sprockets , represents a major maintenance cost on tracked excavators operating on Ghana’s lateritic and rocky mining surfaces. Minerra Ghana’s undercarriage management programme includes regular wear measurement against OEM wear limits, rotation and reversal of components to equalise wear, and planned replacement before wear reaches the point where secondary damage occurs to the carrier roller frame.

Ground engaging tools bucket teeth, adaptor bodies, wear plates, and cutting edges , are managed as a consumable maintenance item with replacement triggered by tooth wear rather than production loss. Worn GET reduces excavator penetration force, increases bucket fill factor, and eventually causes bucket structural damage that is significantly more expensive to repair.

Hydraulic System Maintenance

Hydraulic system performance is central to excavator and drill rig productivity. Minerra Ghana’s hydraulic maintenance scope includes scheduled oil and filter changes, hydraulic oil condition monitoring through oil sampling and analysis, system pressure testing, hose and fitting inspection for wear and chafing, seal replacement, and cylinder rod condition monitoring. Oil contamination , by water ingress, particulate entry, or thermal degradation ,is one of the most common root causes of hydraulic component failure and is managed proactively through our oil analysis programme.

Electrical and Electronic Systems

Modern mining equipment relies on sophisticated electronic control systems , engine management, hydraulic control, transmission management, and operator cab systems. Minerra Ghana’s technicians are trained in fault code reading, sensor diagnostics, and electronic control module programming using current diagnostic equipment. Electrical fault diagnosis is conducted methodically and documented to prevent recurrence.

Mining Infrastructure Maintenance

Beyond mobile equipment, Minerra Ghana provides maintenance services for mining site infrastructure including haul road grading and drainage maintenance, dewatering pump servicing, electrical distribution infrastructure upkeep, and general site facility maintenance. Infrastructure condition directly affects equipment productivity , a poorly maintained haul road costs more in tyre wear and fuel consumption than the road maintenance itself.

Our Mining Equipment Maintenance Services

Maintaining Minerra Ghana’s Own Contract Mining Fleet

When Minerra Ghana is engaged for contract mining, the maintenance of our owned fleet is an integral part of our service delivery. Clients do not carry equipment maintenance risk —,it is ours. Our fleet availability performance is reported transparently and forms part of the commercial framework of the contract

Maintaining Client-Owned Equipment Under an Owner Operator Arrangement

For clients who own their mining fleet and wish to engage Minerra Ghana to manage and operate it, our maintenance service covers the full PPM and corrective scope for the client’s equipment. In this model, clients retain the capital asset and Minerra Ghana takes responsibility for its operational condition, documentation, and compliance with warranty and OEM service requirements.

Standalone Maintenance Contracts for Existing Mine Sites

For mine operators who are satisfied with their current mining contractor or who operate mining in-house, but who wish to outsource fleet maintenance to a specialist, Minerra Ghana provides standalone maintenance contracts covering some or all of the equipment on your site. This model is particularly suited to operations where the current maintenance function is understaffed, under-resourced, or producing poor availability outcomes.

Parts and Consumables Supply in Ghana

Access to quality replacement parts in Ghana’s mining regions can be a significant operational challenge. Lead times from OEM distributors in Accra to remote mine sites in the Western or Brong-Ahafo regions can extend availability-critical repairs by days. Minerra Ghana manages a strategic parts inventory , covering high-turnover consumables, common failure mode components, and wear parts , that allows us to carry out the majority of planned and corrective maintenance work from on-site stock rather than waiting on supply chain delivery.

For major components and OEM-specific parts, Minerra Ghana maintains active relationships with authorised distributors and OEM support channels in Ghana, enabling faster sourcing and reduced lead time compared to operators sourcing parts independently.

Frequently Asked Questions

Mining Equipment Maintenance FAQs

What types of mining equipment does Minerra Ghana maintain?
Minerra Ghana provides maintenance services for excavators, dump trucks (haul trucks), and drill rigs , the primary production equipment of open pit mining operations. We also maintain ancillary mining equipment and infrastructure including water pumps, compressors, haul roads, and site drainage.
Planned preventive maintenance (PPM) is scheduled servicing conducted at defined operating hour or calendar intervals regardless of whether a fault is present , the mining equivalent of a vehicle service. The objective is to maintain equipment condition, identify emerging issues before they become failures, and replace wear components at their service limit rather than at failure. Corrective maintenance is the repair of actual faults or failures , addressing mechanical, hydraulic, electrical, or structural defects that have caused or are about to cause equipment downtime. A well-structured PPM programme reduces the frequency and severity of corrective maintenance events.
Mechanical availability (MA) is the percentage of scheduled operating hours during which equipment is available to work , that is, not undergoing maintenance or repair. Industry benchmark targets for well-maintained open pit mining equipment are typically in the 85–92% range depending on equipment age, application, and terrain conditions. Poorly maintained equipment commonly operates at 70–75% or below, representing a significant productivity and revenue gap. Minerra Ghana’s maintenance programme targets availability performance at the upper end of industry benchmarks.
Minerra Ghana maintains a strategic inventory of high-turnover consumables, common wear parts, and critical component spares that allows the majority of planned and corrective maintenance work to be completed from on-site or near-site stock. For major components and OEM-specific parts, we maintain relationships with authorised distributors in Ghana for rapid sourcing.

Yes. Minerra Ghana can take over the maintenance of existing mine site equipment , regardless of whether we commissioned it , after conducting a fleet condition assessment. This assessment establishes the current maintenance status of each machine, identifies outstanding interventions, and forms the basis of a prioritised corrective and preventive programme.

Oil analysis involves taking samples of engine, transmission, hydraulic, and final drive lubricants and analysing them in a laboratory for signs of abnormal wear, contamination, and oil degradation. Elevated levels of iron, copper, aluminium, or other wear metals in an oil sample can indicate that a specific component is wearing at an abnormal rate , providing early warning of an impending failure before it occurs. Minerra Ghana includes oil sampling and analysis in our maintenance programme as a predictive maintenance tool, particularly for high-value drivetrain components.
All maintenance activities planned services, corrective repairs, inspections, oil changes, and component replacements , are recorded in our maintenance management system with the date, machine hours, technician, work performed, parts consumed, and downtime duration where applicable. These records are maintained throughout the equipment’s operational life and are available to clients as part of our reporting framework.
Major failure events are managed through our breakdown response protocol: rapid on-site assessment by our Lead Engineer, temporary containment if secondary damage is possible (e.g., hydraulic pressure containment, engine protection shutdown), sourcing of replacement component or repair resource, and execution of the repair with minimum delay. For major overhaul work that exceeds on-site capability, equipment may be withdrawn to a suitable workshop facility with a replacement unit mobilised to maintain production where possible.
Yes. For equipment still within OEM warranty, Minerra Ghana’s maintenance programme follows the manufacturer’s prescribed service intervals, approved lubricants and filter specifications, and documentation requirements to preserve warranty standing. We maintain the service records required to support warranty claims.
Yes. Where a client is experiencing poor fleet availability or high unplanned maintenance frequency, Minerra Ghana begins with a detailed assessment of the current maintenance system , reviewing service records, failure history, parts supply chain, technician capability, and workshop facilities. From that assessment we develop a prioritised improvement plan that addresses the root causes of poor availability rather than simply increasing reactive maintenance spend.
Preventive maintenance is time or hours-based service regardless of condition. Predictive maintenance uses equipment monitoring data , vibration analysis, oil analysis, thermal imaging , to predict when a component will fail and schedule maintenance before failure occurs. Condition-based maintenance triggers servicing when a measured condition parameter (wear level, oil analysis result, temperature reading) reaches a defined threshold. Minerra Ghana employs all three approaches, selecting the appropriate method based on component criticality, failure consequences, and monitoring feasibility.
Unexpected ground conditions , harder or softer rock than predicted, water ingress, faulting, or geological structures , are addressed through prompt communication with the client’s technical team and, where necessary, an adjustment to the blast design, mining sequence, or equipment configuration. Material variations that affect production cost are documented and addressed through the contract variation management process agreed at contract award.
In remote locations, Minerra Ghana pre-positions a site-specific parts inventory based on the equipment configuration and historical consumption rates for that equipment type. Supply chain logistics , from Accra or OEM distribution points to site , are managed through our established supply chain relationships to minimise parts lead time. For critical components with long lead times, we maintain forward ordering protocols to ensure availability before stock-out occurs.
Our Services
Tailing Management
Drill & Blasting
Contract Mining
Equipment Maintenance

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MinerraGH

Minerals Commission-licensed mining support contractor delivering technically rigorous solutions across Ghana and West Africa.
SERVICES
  • Tailing Management
  • Drill & Blasting
  • Contract Mining
  • Maintenance Services
COMPANY
CONTACT
  • +233 24 677 4450
  • info@minerra.com.gh
  • Adjiriganor, East Legon, Accra
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Minerals Commission Licensed