| 1 | Define the required operating capacity | Match bucket size, rated payload, breakout force, lift height, and machine dimensions to the mine’s loading and haulage cycle. | Underground loaders commonly range from approximately 1 to 25 metric tonnes of rated payload. Select capacity based on tunnel width, drawpoint size, truck volume, and ventilation limits. | Application assessment, mine layout drawings, loading-cycle study, and a written machine-selection recommendation. |
| 2 | Calculate the total cost of ownership | Include purchase price, freight, import duties, commissioning, fuel or electricity, tires, lubricants, maintenance, operator training, and resale value. | Operating costs can exceed the initial purchase price over the machine’s service life. Request a 5-year or 10,000-hour cost model using local energy, labor, and parts prices. | Itemized quotation, lifecycle cost spreadsheet, consumption assumptions, maintenance schedule, and residual-value estimate. |
| 3 | Verify fuel or energy efficiency | Compare fuel consumption or battery energy use under the same payload, travel distance, gradient, and idle-time assumptions. | Diesel consumption varies significantly with payload, ramp grade, traffic, and idle time. Battery-electric models require verification of charge time, usable battery capacity, and charging infrastructure. | Standardized field-test results, duty-cycle assumptions, energy-consumption records, and charger or ventilation requirements. |
| 4 | Assess productivity and cycle time | Confirm loading time, travel speed, dumping time, turning radius, availability rate, and compatibility with the mine’s haul trucks or ore passes. | Productivity should be calculated as payload × effective cycles per hour, after subtracting delays, refueling or charging, shift changes, and planned maintenance. | Demonstration report, cycle-time worksheet, payload chart, speed-versus-gradient chart, and compatibility assessment. |
| 5 | Inspect equipment availability and delivery timing | Determine whether the loader is in stock, in production, or subject to a custom build. Confirm shipping route, customs clearance, commissioning date, and spare-unit options. | Lead times can range from several weeks for available units to many months for customized or newly manufactured equipment. Obtain a firm delivery milestone schedule. | Stock confirmation, production slot, estimated shipping date, bill of materials, delivery schedule, and delay-compensation terms. |
| 6 | Evaluate dealer and field-service support | Check local technician coverage, emergency response time, training capability, diagnostic tools, parts inventory, and support during night shifts. | For critical underground equipment, target a clearly defined response time, such as 24-hour remote support and an agreed on-site response window for breakdowns. | Service-level agreement, technician qualifications, service-area map, escalation procedure, and list of stocked critical parts. |
| 7 | Review warranty coverage and exclusions | Clarify warranty duration, hour limits, powertrain coverage, battery coverage where applicable, wear-part exclusions, labor reimbursement, and claim procedures. | Warranty terms often combine a calendar period with an operating-hour limit. Compare the shorter applicable limit and verify whether major components have separate coverage. | Complete warranty certificate, exclusions list, claim workflow, labor-rate policy, and written confirmation of covered components. |
| 8 | Check safety and regulatory compliance | Verify braking systems, emergency stop functions, operator protection, visibility, fire suppression, lighting, backup alarms, emissions compliance, and mine-site approval requirements. | Requirements depend on jurisdiction and mine classification. Underground diesel equipment may require approved emissions controls and documented maintenance of ventilation-related systems. | Safety certificates, conformity declarations, test records, risk assessment, operator manual, and mine-specific acceptance checklist. |
| 9 | Confirm parts, maintenance, and tire availability | Review preventive-maintenance intervals, expected component life, tire dimensions, hydraulic filters, transmission parts, batteries, and delivery times for critical items. | Ask for a recommended critical-spares list covering at least the planned startup period. Compare maintenance intervals and the availability of locally compatible consumables. | Parts catalog, preventive-maintenance plan, critical-spares quotation, service-tool list, and standard parts lead times. |
| 10 | Complete a site trial and contract review | Test the loader in representative material and conditions, then confirm acceptance criteria, payment milestones, performance guarantees, training, and remedies for nonperformance. | A meaningful trial should measure payload, cycle time, availability, energy use, operator visibility, maneuverability, and unplanned downtime against agreed targets. | Signed trial protocol, acceptance-test results, operator feedback, performance guarantees, training plan, and final purchase contract. |