Modern trailers equipped with auto inflation systems are designed to maintain tire pressure, reducing the risk of blowouts and improving fuel efficiency. Understanding how these systems function ensures their optimal use, enhancing safety and performance on the road.
Identifying the Auto Inflation System
To determine if your trailer has an auto inflation system, look for two distinct air hoses extending from the axle hubs to the inflation valves on each tire. The system uses air from the trailer’s air tank, activating when the tank’s pressure reaches a minimum of 80 psi. A small pressure monitor box mounted above the front axle regulates the system. If any tire is underinflated, the system supplies the required air to bring it back to the recommended pressure.
Operating the System Safely
On/Off Valve
The pressure monitor box includes a valve that acts as the system’s On/Off switch. For proper operation, ensure this valve is set to “Run.” It’s not uncommon for technicians to turn off the valve during maintenance and forget to reactivate it. A deactivated system can result in underinflated tires, increasing the risk of accidents or tire damage.
Indicator Light
A white light located on the front driver’s side of the trailer provides a visual cue about the system’s status:
- Light On During Connection: It’s normal for the light to remain on for a few minutes as the system equalizes tire pressures.
- Light On While Driving: If the light stays illuminated, it signals a possible inflation issue. Safely pull over to inspect the system and address the problem.
Manual Checks and Maintenance
While the auto inflation system simplifies tire pressure management, manual checks are still vital:
- Use a Tire Gauge:
Unscrew the air hose where it connects to the hub, and use a handheld air gauge to measure the pressure at the hose’s end. The valve at the hose’s end functions similarly to a standard valve stem. - Verify Recommended PSI:
Check the tire’s sidewall for the recommended PSI and compare it to your manual reading. - Thump the Tires:
Include a firm tire thump in your pre-trip inspection to identify any obvious pressure issues quickly.
Why Auto Inflation Systems Matter
Auto inflation systems are valuable tools for maintaining consistent tire pressure, reducing wear and tear, and increasing fuel efficiency. However, they’re not foolproof. Regular manual checks complement the system and ensure it functions effectively.
Final Thoughts: Stay Proactive
Understanding how your trailer’s auto inflation system works and incorporating manual inspections into your routine enhances your safety and efficiency on the road. Keep the system in “Run” mode, monitor the indicator light, and always verify tire pressures manually to ensure every trip is smooth and trouble-free.
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