Mechanical Systems
Pumps, compressors and mechanical plant supporting a facility's core systems.
Most mechanical failures are announced well in advance — by vibration, noise or temperature — to anyone actually listening.
Why this service exists
Mechanical plant sits behind almost every other hard service — HVAC, fire systems and lifts all depend on mechanical components functioning correctly, which is why this service is defined broadly rather than folded entirely into the systems it supports.
What the service covers
- Pump and compressor maintenance.
- Mechanical plant inspection.
- Vibration and condition monitoring.
- Bearing and seal replacement.
- Plant room management.
Assets and objects
- Plant rooms.
- Pumps.
- Compressors.
- Mechanical drive systems.
Who takes part
- Mechanical engineer/technicianRequired
Mandatory.
- FM operations managerRequired
Steers scheduling and prioritisation.
- Specialist contractorSituational
For major plant.
What the service needs
- Manufacturer maintenance schedules.
- Condition-monitoring data.
- Plant inventory and criticality ratings.
How delivery runs
- 01Maintain a criticality-rated plant inventory.
- 02Schedule planned maintenance against manufacturer and criticality-driven intervals.
- 03Monitor condition indicators (vibration, temperature, noise) for early fault signals.
- 04Execute corrective work against a prioritised backlog.
- 05Log all interventions against the asset record.
What is delivered
- Maintained plant.
- Completed work orders.
- Updated condition logs.
From output to outcome
Maintained mechanical plant with current condition logs.
Reliable operation of every system mechanical plant supports.
The outcome is measured in avoided failures elsewhere (a failed pump doesn't just fail itself, it fails the cooling system or the fire-suppression system it serves), which is why mechanical-systems KPIs should be read alongside the downstream systems' own performance data, not in isolation.
Where it gets tense
- Maintenance intervals set once at commissioning and never revisited against actual duty cycles.
- Plant criticality ratings that haven't been updated as building use changes.
Strategic, tactical, operational
Plant criticality mapping should inform business continuity planning directly.
Spares strategy — holding critical spares versus relying on supplier lead times is a real trade-off, not a default.
Plant room access and permit-to-work discipline, since this is high-risk maintenance environment.
Performance indicators
- Planned-vs-reactive maintenance ratio
Leading signal for maintenance quality.
- Mean time between failures on critical plant
Shows reliability directly.
- Plant availability percentage
Core measure of service delivery.
Risks
- Pressure systems regulations where applicable.
- Confined-space entry protocols for plant rooms.
- Lock-out/tag-out discipline.
Statutory context
Where pressure equipment is involved, jurisdiction-specific inspection and registration duties apply; this responsibility rests with the organisation, not the maintenance provider.
Sourcing options
- Bundled
Frequently bundled with HVAC maintenance given the overlap.
- Single service
Also single-service outsourced for specialist plant.
Technology and data
- Vibration analysis sensors.
- Thermal imaging.
- CMMS-scheduled maintenance.
Competencies required
- Mechanical engineering.
- Condition-monitoring interpretation.
Common mistakes
- Running mechanical maintenance purely reactively because plant is "out of sight".
- Failing to update criticality ratings as the building's dependency on specific plant changes over time.