Industry reliability guide

Mining & Quarrying

Dust, shock load, long shifts and remote operation make contamination control and early wear detection central to mobile-equipment reliability.

Operating context

Design the programme around how the assets fail.

Mining fleets combine diesel engines, final drives, transmissions and high-pressure hydraulics under severe dust, load and temperature cycles. Separate every compartment in the asset register and trend it against hours, production and maintenance events.

Use this guide to scope an oil-analysis programme; then confirm equipment-specific limits, methods and safety controls with the laboratory, OEM and site engineering team.

Equipment-to-test map

What to test—and why.

Routine panels create comparable history. Triggered tests answer a focused question after a trend change, inspection finding or operating event.

Mining & Quarrying equipment, fluid, test and sampling map
Equipment	Fluids	Primary risks	Routine tests	Triggered / advanced tests	Sampling approach
Haul trucks and loaders	Engine oil, transmission oil, final-drive oil, hydraulic fluid, coolant	Dust ingress, fuel dilution, overload wear, coolant leakage	elemental analysis icp oes, kinematic viscosity, fuel dilution, soot, base number	pq index, analytical ferrography, particle count, glycol contamination	Sample each compartment from a dedicated live-zone point immediately after representative operation.
Excavators and shovels	Engine oil, swing/final-drive oil, hydraulic fluid	Hydraulic cleanliness, pump wear, dirt ingress, gear distress	particle count, karl fischer water, kinematic viscosity, elemental analysis icp oes	pq index, analytical ferrography, ftir oil condition monitoring	Use pressure-line or turbulent return ports where engineered; do not combine compartments.
Crushers and conveyors	Gear oil, bearing oil, grease	Shock loading, misalignment, abrasive particles, water	elemental analysis icp oes, pq index, karl fischer water, kinematic viscosity	analytical ferrography, particle count	Sample gearbox return or mid-level oil; collect representative grease from the purge zone.

Programme priorities

Controls that make the data useful.

01Control airborne dirt at breathers, seals and transfer points
02Trend by component and oil hours, not fleet average
03Inspect filters and magnetic plugs when ferrous debris rises
04Shorten intervals after rebuilds, overloads or ingress events

Maintenance outcomes

Decisions the programme should improve.

01Earlier component inspection
02Improved filtration and sealing
03Condition-based oil and filter changes
04Reduced unplanned mobile-equipment downtime

Programme architecture

Build a closed evidence-to-action loop.

A test panel becomes a reliability programme only when the sample, interpretation, response and field outcome remain connected to the same asset and compartment.

Mining & Quarrying condition-monitoring programme architecture
Stage	Control	Evidence created	Decision
1 · Baseline	Confirm asset, compartment, fluid, method, point and operating state	Comparable new or stable in-service reference	Define normal variability and initial interval
2 · Routine surveillance	Collect at a fixed risk-based interval from the documented point	Trend of fluid condition, contamination and wear	Continue, monitor or request focused confirmation
3 · Exception diagnosis	Use mechanism-specific tests, secondary points, filters and companion technologies	Independent evidence for or against the failure hypothesis	Protect, inspect, correct or revise the hypothesis
4 · Verification	Repeat comparable evidence after maintenance	Post-action condition and rate of change	Close the work order or escalate
5 · Programme learning	Record inspection findings, false positives and missed detections	Asset-specific failure signatures and improved rules	Change point, panel, interval, limit or procedure

Interpretation ladder

Translate severity into a defined response.

These are workflow classes—not universal pass/fail limits. Asset consequence, rate of change and site safety procedures control the urgency.

Mining & Quarrying severity and response framework
Class	Typical evidence pattern	Minimum review	Possible response
Stable / Normal	Comparable results remain within the justified baseline and no corroborating distress is present	Confirm route and context are complete	Continue the planned interval
Monitor	A small deviation, unusual rate of change or incomplete contextual explanation	Check sample, top-up, maintenance and companion indicators	Clarify data, add one focused test or shorten the interval
Abnormal / Investigate	Unsatisfactory fluid, contamination or wear evidence with a credible developing mechanism	Confirm promptly using independent evidence	Inspect, control the source and plan corrective work
Critical / Urgent review	Rapid, severe or corroborated change with material equipment or safety consequence	Immediate qualified operational and engineering review	Apply site procedures; protect people and equipment before diagnosis continues

Read the severity and maintenance-feedback guide →

Connected test references

Open the laboratory method context.

Complete test library →