O
Onboard Diagnostics Port
Diagnostic connector allowing laptop access to vehicle ECUs. Used by UK service engineers for fault finding and firmware updates.
Oil Separator (Water)
Trap removing oil from water recirculation.
Oil Temperature Gauge
Gauge displaying hydraulic-oil temperature on the control panel. Prevents overheating and indicates when the system is ready for heavy use.
Oil-Cooler Thermostat
Valve regulating flow through the hydraulic-oil cooler. Keeps fluid within the 40–70 °C optimum temperature range for long component life.
Oil-Drain Safety Tray
Tray positioned beneath oil filters during draining. Captures hot oil safely and prevents environmental spills.
Oil-Filter Pressure Switch
Switch monitoring differential pressure across the oil filter. Illuminates warning lamp when filter approaches blockage threshold.
Oil-Fired Burner
Common burner for bitumen sprayer heating.
Oil-Sampling Port
Port allowing collection of hydraulic-oil samples for lab analysis. Used in predictive maintenance to monitor system health.
On-Board Air Compressor
Compressor powering air valves and tools.
On-Board Data Modem
Modem transmitting operational data via cellular network. Enables real-time fleet tracking and maintenance alerts.
