Trailers often do more work than the trucks that pull them — yet they receive far less maintenance. This leads to preventable breakdowns, defect notices and safety risks.
At Oliveri Heavy Vehicle Repairs, we see the same common issues across trailers operating in St Marys, Western Sydney and throughout Sydney.
1. Bearings & Hub Assemblies
Trailer bearings wear quickly under heavy loads. If they fail, wheels can lock or detach.
Regular bearing inspections prevent:
- Overheating
- Metal damage
- Wheel failure
- On-road breakdowns
2. Electrical Wiring & Lighting Issues
Faulty lights are one of the top reasons trailers fail roadside inspections.
Common faults include:
- Damaged plugs
- Broken wiring
- Corroded connectors
- Faulty LEDs
Proper electrical servicing prevents costly defect notices.
3. Brake System Wear
Trailer brake systems must match the performance of the towing vehicle.
Common issues include:
- Worn brake linings
- Faulty actuators
- Air leaks
- Contaminated drums
Routine brake inspections ensure safe braking performance.
4. Air System Leaks
Air valve and line faults can cause:
- Trailer roll instability
- Delayed braking
- Poor suspension height control
Regular checks keep air systems functioning properly.
5. Structural Fatigue or Cracking
Trailers endure significant stress from load weight and road conditions.
Technicians inspect for:
- Cracks
- Rust
- Bent components
- Worn kingpins
Final Thoughts
Trailer servicing is essential for safety, compliance and reliability.
Oliveri Heavy Vehicle Repairs provides full trailer inspections and repairs for operators across Western Sydney and Greater Sydney.