Dashboard Symbols in Semi-Trucks
Your next loading dock is 45 minutes away. A quick glance at the dashboard shows a low fuel level and a tire inflation light. Should you pull over or continue driving? While some dashboard lights indicate emergencies, others signal issues that need attention soon. Understanding each panel control helps drivers detect and report complications.
Common Truck Gauges
Dashboard gauges display vital information about the truck’s functioning:
- Odometer: Displays total and route-specific mileage, helping determine maintenance needs.
- Voltmeter: Shows battery charge status. A fully charged battery reads 14-14.5 volts when the engine is running. Check the system if the voltage is consistently below 14 or above 15 volts.
- Tachometer: Measures engine speed in RPM. Diesel engines peak at lower RPMs.
- Engine Oil Pressure: Normal pressure is 30-70 PSI. Inadequate pressure can cause engine damage.
- Fuel Gauge: Regularly check to ensure enough diesel to reach your destination.
- Air Pressure: Measures PSI in each reservoir. Pressure below 90 may indicate air brake system issues.
- Temperature Gauges: Include coolant, engine oil, pyrometer, transmission, and axle oil temperatures. Familiarize yourself with normal ranges for your vehicle.
Dashboard Symbols and Warning Lights
Knowing what each warning light means is crucial:
- Check Engine Light: Indicates minor or major issues. Look for other warning signals and pull over safely.
- Low Coolant Level: Signals low coolant. Relay this to the carrier for a maintenance checkup.
- Tire Inflation: Underinflated tires can cause breakdowns or accidents. Check tire pressure if this light flashes.
- Alternator Check: Indicates the alternator may not be charging the battery correctly. Pull over and minimize accessory use until checked.
