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Trailer Maintenance Checklist

Keeping Your Trailer in Top Shape with Expert Tips


Owning a trailer comes with the responsibility of maintaining it to ensure safety, longevity, and optimal performance. Regular maintenance is crucial not only to prevent unexpected breakdowns and costly repairs but also to preserve and enhance its resale value, making your trailer a smart investment. A well-maintained trailer will command a higher price and attract more buyers when it’s time to sell. Here’s a comprehensive checklist to keep your trailer in top condition.


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1. Regular Cleaning and Care


  • ACM Panel Care: Frequency: Every 1-2 months. Tip: ACM (Aluminum Composite Material) panels, especially in high gloss finishes like black, can scratch easily. When cleaning, use a water blaster or hose and refrain from using brushes or cloths. If you use a water blaster, avoid pointing it directly at joints, seals, and corners to prevent compromising the seals or water tightness.


under chassis view of trailer

2. Wheel and Axle Maintenance


  • U-Bolts and Wheel Nuts: Frequency: First check at 600 km for new trailers, then every 2,000 km. Tip: For new trailers, check the U-bolts on the axle(s) and wheel nuts after the first 600 km and tighten if necessary. Thereafter, continue checking them regularly, at least every 2,000 km.


  • Wheel Bearings: Frequency: Every 10,000 km or annually. Tip: Jack the trailer up and spin the wheels. Listen for any rumbling noises, which indicate worn wheel bearings that need replacing. Also check for any play by holding the wheel firmly at 12 o'clock and 6 o'clock, moving back and forth.


3. Tyre Maintenance


  • Tyre Pressure: Frequency: Every trip or at least once a month. Tip: Check tyre pressures regularly to ensure they are at the manufacturer’s recommended levels. Under-inflated or over-inflated tyres can cause uneven wear and affect the trailer's handling.


  • Tyre Wear and Damage: Frequency: Every trip or at least once a month. Tip: Inspect tyres for signs of wear, cracks, or other damage. Replace any tyres that show significant wear or damage to maintain safe driving conditions.


4. Lights and Reflectors

Enclosed trailer rear view

  • Cleaning: Frequency: Every 1-2 months. Tip: Clean all lights and reflectors to ensure they are visible and functioning correctly.


  • Functionality: Frequency: Every trip. Tip: Check that all lights are working, including brake lights, indicators, and tail lights. Replace any faulty bulbs immediately.


5. Tow Coupling and Brakes


  • Lubrication: Frequency: Every 6 months. Tip: Ensure the tow coupling and brake mechanisms are well-lubricated. This can be done during regular servicing at your local garage to keep everything operating smoothly.


6. Trailer Brakes Maintenance

Knott 3.5t mechanical brake setup

  • Brake Inspection: Frequency: Every 10,000 km or annually. Tip: Inspect brake pads and shoes for wear. Replace them if they are worn down to the manufacturer’s minimum thickness.


  • Brake Adjustment: Frequency: Every 5,000 km. Tip: Adjust the brakes to ensure they are providing even and adequate stopping power. Improperly adjusted brakes can lead to increased stopping distances and uneven wear.

  • Types of Brakes: Electric Brakes: Adjust according to the load carried. Use the brake controller in your vehicle to fine-tune the braking force based on the weight of the trailer. Hydraulic Surge Brakes: Check the hydraulic fluid level and ensure there are no leaks. Adjust the tension on the actuator to ensure the brakes engage smoothly. Manual Brakes: Follow the manufacturer’s guidelines for manual adjustment. Ensure the brake shoes are evenly contacting the drum.


  • Brake Fluid: Frequency: Every 6 months. Tip: Check the brake fluid levels and top up if necessary. Low brake fluid can lead to reduced braking performance.


  • Brake Lines and Connections: Frequency: Every 6 months. Tip: Inspect brake lines and connections for signs of wear, corrosion, or leaks. Replace any damaged or worn components to ensure the braking system is functioning correctly.


  • Brake Drums and Rotors: Frequency: Every 10,000 km or annually. Tip: Inspect brake drums and rotors for scoring, cracks, or excessive wear. Resurface or replace them if necessary to maintain effective braking.


7. Legal Requirements

WOF tag on trailer

  • Warrant of Fitness and Rego: Frequency: As required by local regulations, typically annually. Always keep the trailer's Rego and Warrant of Fitness (WoF) up to date. This is a legal requirement and ensures your trailer meets the safety standards.


Conclusion

Regular maintenance of your trailer is essential for safety and durability. By following this checklist and adhering to the recommended maintenance intervals, you can keep your trailer in excellent condition and enjoy peace of mind on the road. Remember, preventive maintenance not only saves money but also enhances the overall performance and lifespan of your trailer. Safe travels!


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Feel free to share this maintenance checklist with fellow trailer owners and help everyone keep their trailers in top shape! If you have any specific questions or need further assistance, don't hesitate to reach out to our expert team.


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