10 Trailer Maintenance Checks Every Owner Should Do

4 September 2026 | roshartrailers

A trailer can look perfectly fine while developing problems underneath. Tyres age, bearings lose lubrication, brake components wear, wiring corrodes, suspension bushes loosen and small cracks or rust spots can grow into expensive repairs.

For a homeowner using a trailer a few times a year, the maintenance routine can be straightforward. For a tradie, landscaper, farmer or contractor towing five days a week, the trailer deserves much more attention.

According to NSW Government towing guidance, owners should check that the trailer is roadworthy before each trip, including tyres, wheel bearings, suspension, brakes, lights and safety chains.

This guide turns those broad requirements into a practical trailer maintenance checklist you can work through before towing and during scheduled servicing.

What should a trailer maintenance checklist include?

A trailer maintenance checklist should cover the components that control connection, braking, wheels, tyres, lighting, suspension, structure and load security. Owners should perform quick safety checks before towing, while deeper inspections and repairs should follow manufacturer and operating requirements.

The National Heavy Vehicle Inspection Manual provides inspection guidance covering brakes, couplings, suspension, wheels, tyres, hubs, structure, body condition, lights and reflectors.

For everyday owners, that means maintenance should not be treated as one annual job. Different components need attention at different times.

Practical inspection framework

Area	Quick owner check	Deeper maintenance
Tyres	Pressure, tread, cracks and visible damage	Condition, wear pattern and replacement
Bearings	Noise, play and abnormal heat	Adjustment, lubrication or replacement
Brakes	Operation and visible faults	Wear, adjustment and component testing
Lights	Indicators, brake and tail lights	Wiring, plugs, earths and damaged components
Coupling	Locking, wear and connection	Detailed wear and mechanism inspection
Safety chains	Attachment and visible condition	Rating, wear and attachment points
Suspension	Sagging, damage or unusual movement	Springs, bushes, hangers and alignment
Chassis	Cracks, bends and corrosion	Structural inspection and repair
Load area	Floor, sides, gates and tie-downs	Repairs and replacement
Corrosion	Rust spots and coating damage	Treatment, recoating or structural repair

The important distinction is simple: a visual check can identify a warning sign, but it cannot prove every component is mechanically sound.

1. How should I check trailer tyres?

Check trailer tyres before every tow for correct pressure, tread condition, cracks, bulges, cuts, uneven wear and objects lodged in the tread. Inspect the spare as well. Replace tyres when condition or age makes them unsuitable, following the tyre and trailer manufacturer’s requirements.

Tyres are the only part of the trailer directly contacting the road, so they deserve attention every time the trailer leaves the driveway.

According to the WA Road Safety Commission, trailer tyres should have adequate tread and be in good condition, with tyre pressure and wheel nuts checked as part of trailer maintenance.

Look for these warning signs

• Cracks in the sidewall
• Bulges or deformation
• Uneven tread wear
• Excessively worn tread
• Low pressure
• Cuts or punctures
• Exposed cords
• Tyre rubbing against the trailer
• Damaged valve stems
• Loose or damaged wheel nuts

Uneven wear can tell you something is wrong elsewhere. If one tyre is wearing significantly faster than the other, do not simply replace the tyre and ignore the cause. Suspension, alignment, overloading or wheel-related problems may need investigation.

Practical example: A landscaper towing a tandem trailer several days a week may notice the inside edge of one tyre wearing faster than the rest. That is a reason to inspect the running gear rather than simply inflating the tyre and continuing to work.

2. How do I check trailer wheel bearings?

Check trailer wheel bearings for abnormal noise, excessive play, heat, rough rotation or visible damage. Bearings need appropriate lubrication and adjustment, but detailed bearing work should follow the component manufacturer’s procedure or be handled by a qualified person when specialised tools or disassembly are required.

Wheel bearings work under repeated load and rotation, making them one of the most important items in your tyre and bearing checks.

According to the WA Road Safety Commission, wheel bearings should be in good condition and properly lubricated, with wear or corrosion requiring attention.

Warning signs include:

• Grinding or rumbling noise
• Excessive hub movement
• Unusual heat after towing
• Grease leakage
• Corrosion
• Rough rotation
• Damaged seals

Do not confuse normal operating warmth with a dangerously hot hub. A significant temperature difference between wheels after similar towing conditions is a reason to investigate.

Practical example: If one hub is noticeably hotter than the other after a highway trip, stop somewhere safe and allow the components to cool. Do not immediately assume the bearing is the only possible cause; brake drag can also create excessive heat.

For regular trailer servicing, bearings should be inspected according to the trailer manufacturer’s maintenance instructions and the trailer’s actual workload.

3. What should I check on trailer brakes?

Check that the trailer braking system operates correctly and inspect for visible wear, damage, leaks or electrical problems. Brake maintenance varies by system, so detailed adjustment, component replacement and diagnosis should follow the manufacturer’s procedure and applicable Australian requirements.

Braking deserves particular attention on heavier trailers and trailers used regularly for business.

Roshar’s separate guide explains Australian trailer brake requirements in more detail, including the relationship between GTM, brake systems and breakaway requirements.

Use this article as the general maintenance checklist, then refer to the specialist brake guide when you need the legal or technical detail.

Basic brake check

• Confirm the brake connection is secure.
• Test the trailer brakes where appropriate.
• Check for obvious damage.
• Look for hydraulic leaks if applicable.
• Inspect visible wiring on electric brake systems.
• Watch for pulling, grabbing or unusual braking behaviour.
• Listen for grinding or abnormal brake noise.
• Check the breakaway system where fitted.

When brakes need professional attention

If braking feels weak, uneven or unpredictable, do not treat it as a minor maintenance issue.

Practical example: A contractor notices that the trailer seems to push the tow vehicle more heavily than normal when slowing down. The correct response is to investigate the braking system before the next loaded job rather than compensating by simply driving more slowly.

4. How do I check trailer lights and wiring?

Check every trailer light before towing, including indicators, tail lights, brake lights, number-plate illumination where fitted and reflectors. Inspect the plug, cable and visible wiring for corrosion, cuts or loose connections, because electrical faults can develop even when the lights worked on the previous trip.

This is one of the simplest parts of your lights and brakes inspection, and it should take only a few minutes.

According to NSW Government towing guidance, all trailer lights should work and safety chains should be properly connected before each trip.

Walk-around light test

1. Connect the electrical plug securely.
2. Turn on the vehicle lights.
3. Test left and right indicators.
4. Test brake lights.
5. Check tail lights.
6. Inspect the plug and cable.
7. Look for damaged wiring around the drawbar.
8. Check visible reflectors.

Corrosion is a common concern for trailers exposed to rain, mud, coastal air or repeated outdoor storage.

Practical example: If an indicator works intermittently when the cable is moved, do not assume the problem will disappear. A loose connection or damaged wiring can become a complete lighting failure at the worst possible time.

5. How should I inspect the coupling and safety chains?

Inspect the coupling before every tow to ensure it is correctly seated, locked and matched to the tow vehicle connection. Check safety chains, attachment points, jockey wheel hardware and the drawbar connection for damage, excessive wear or looseness.

The coupling is the physical connection between your trailer and vehicle. If that connection is wrong, the rest of the trailer’s maintenance becomes irrelevant.

Check these components

• Coupling head
• Locking mechanism
• Tow ball connection
• Safety chains
• Chain attachment points
• Jockey wheel
• Handle and clamps
• Drawbar
• Electrical plug
• Breakaway connection where fitted

According to the WA Road Safety Commission, the coupling and safety chains should be checked as part of trailer maintenance, while pre-trip checks should confirm they are secure.

Practical example: Before leaving a worksite, a builder notices that the jockey wheel clamp is loose. Fixing it before departure is a two-minute job; discovering the problem after the wheel drops onto the road is a very different situation.

6. What should I look for in the suspension and axles?

Inspect the suspension and axles for cracks, bent components, damaged springs, worn bushes, unusual sagging, loose hardware and uneven tyre wear. Any visible structural damage or significant change in towing behaviour warrants further inspection before the trailer is loaded and used again.

Suspension problems do not always announce themselves with a dramatic failure. A trailer may begin bouncing more than usual, sitting unevenly or wearing tyres differently before the underlying fault becomes obvious.

Look for:

• Broken or cracked springs
• Damaged shackles
• Worn bushes
• Bent axle components
• Loose fasteners
• Uneven ride height
• Excessive movement
• Unusual clunking
• Uneven tyre wear

According to the NHVR inspection framework, steering/suspension and wheels, tyres and hubs are distinct inspection areas because wear and damage in these systems can affect vehicle condition.

For a heavy tandem trailer used on construction sites, suspension deserves more frequent attention than a lightly used household trailer.

7. How do I inspect the trailer chassis and drawbar?

Inspect the chassis and drawbar for cracks, bends, corrosion, damaged welds, loose components and signs of previous repairs. Pay particular attention to high-stress areas around the drawbar, suspension mounts, coupling and other structural connections.

This check is often skipped because owners focus on what they can see from above.

Get down and look underneath.

Check for:

• Cracked welds
• Bent chassis members
• Heavy rust
• Corroded mounting points
• Damaged drawbar sections
• Previous repair work
• Loose bolts or fasteners
• Impact damage

The Department of Infrastructure’s trailer requirements guidance covers areas such as ATM, tare mass, registration, VIN and road vehicle standards, highlighting that trailer ownership involves more than simply maintaining the visible bodywork.

Practical example: A trailer used to carry compact machinery may experience much higher loading forces than a trailer used for occasional garden waste. Inspect the chassis accordingly, particularly around ramps and concentrated loading points.

If you discover a crack in a structural component, don’t treat it like a cosmetic issue.

8. How should I check the trailer floor, sides and load-restraint points?

Inspect the trailer floor, side panels, gates, ramps, hinges and load-restraint points for damage, looseness, corrosion and excessive wear. Any component that helps contain or secure the load should be strong enough for its intended use and kept in serviceable condition.

A trailer can be mechanically sound but still become unsafe because the load area is damaged.

Check:

• Floorboards or metal floor
• Side panels
• Tailgate
• Hinges
• Latches
• Ramps
• Tie-down points
• Toolboxes
• Cage sections
• Ladder racks
• Mounting brackets

This matters particularly for tradesman, plant, flat top, cage and machinery trailers.

Roshar’s live range includes different trailer configurations such as box, cage, plant, machinery, flat top, tandem and tradesman trailers, each designed around different transport requirements.

If a tie-down point is cracked or distorted, do not assume the surrounding metal will compensate for it.

9. How do I prevent rust and corrosion?

Prevent trailer corrosion by washing away mud, dirt and contaminants, checking damaged coatings and treating small rust areas before corrosion spreads. Pay particular attention to the underside, drawbar, chassis, wheel areas, joints and places where water or debris can remain trapped.

Corrosion is especially relevant for trailers exposed to wet conditions, coastal air, landscaping materials, road grime and outdoor storage.

Simple corrosion routine

Wash after dirty or wet use: remove mud, plant material, soil and road debris before they remain against metal surfaces.

Inspect damaged coatings: scratches and chips expose underlying metal and should be addressed according to the finish and manufacturer’s recommendations.

Check underneath: the underside can hold mud and moisture long after the visible trailer looks clean.

Keep drainage clear: trapped water accelerates corrosion around seams and enclosed sections.

Roshar’s own site highlights robust steel construction, rust-resistant coatings and proper welding as important considerations when assessing trailer quality and durability.

Practical example: A landscaping trailer carrying wet green waste can collect moisture and organic debris around the floor and lower frame. Cleaning it after heavy jobs is far better than allowing the material to remain against the trailer for weeks.

10. What should I check after storing or heavily using a trailer?

After a trailer has been stored for several months or subjected to heavy work, complete a full pre-use inspection rather than assuming it is ready because it was working properly when parked. Check tyres, bearings, brakes, coupling, lights, suspension, structure and visible corrosion before towing.

Storage creates its own maintenance problems.

Tyres can lose pressure. Electrical connections can corrode. Brake components can seize. Bearings can develop problems. Moisture can remain around the chassis.

Likewise, heavy work can accelerate wear even when a trailer is relatively new.

Inspect after:

• Several months of storage
• Heavy construction work
• Rough-site use
• Repeated heavy loading
• Muddy or wet jobs
• Coastal exposure
• Long-distance towing
• An unusually heavy load
• A collision or impact
• A noticeable change in towing behaviour

South Australia recommends frequent checks during towing because towing places additional stress on the towing system.

How often should I inspect a trailer?

You should inspect a trailer before every tow, while deeper maintenance should be scheduled according to manufacturer guidance, mileage, workload, road conditions, storage and trailer type. Daily commercial use generally demands more frequent attention than occasional household towing.

There is no universal interval that makes every trailer safe.

A small box trailer used for a few household trips each year has a very different workload from a tandem trailer carrying construction materials every weekday.

Suggested inspection rhythm

Trailer use	Before each trip	Routine deeper inspection
Occasional household use	Yes	At least annually or as manufacturer recommends
Regular DIY use	Yes	Periodically based on use
Tradie trailer	Yes	More frequently according to workload
Landscaping trailer	Yes	Increase frequency after wet/heavy work
Farm trailer	Yes	Pay extra attention after rough terrain
Plant/machinery trailer	Yes	Frequent inspection based on machine weight and use
Daily commercial trailer	Yes	Planned maintenance schedule based on operating conditions
Stored trailer	Before reuse	Inspect before returning to road use

These are practical planning intervals, not replacements for the trailer manufacturer’s instructions or applicable state requirements.

Value Trailers’ care guidance uses 5,000 km or 12 months as a servicing benchmark and notes that commercial operators may require more frequent servicing.

The better approach is to treat mileage and calendar time as triggers, then tighten the schedule when the trailer works harder.

When should I stop towing and get professional help?

Stop towing when you identify a fault that could affect braking, wheel security, tyres, coupling, suspension, structural integrity or safe load control. Do not attempt to compensate for a serious mechanical problem by driving more slowly or taking a shorter route.

Stop and investigate if you notice:

• A cracked chassis or drawbar
• A loose or damaged coupling
• Severe tyre damage
• A wheel or hub running unusually hot
• Grinding from a wheel
• Major brake problems
• A broken suspension component
• Significant wheel movement
• A trailer that suddenly pulls or handles differently
• A load-restraint point that has failed
• Electrical faults affecting critical lighting

If the problem requires dismantling, welding, brake adjustment, bearing replacement, electrical diagnosis or structural repair, professional assistance is the safer option.

Roshar lists Repairs & Maintenance among its services, alongside custom trailer manufacturing.

For owners looking for trailer repairs Melbourne, the key is not simply finding the cheapest repair. Find the cause of the problem and make sure the repaired component is suitable for the trailer’s actual use.

How can a maintenance schedule reduce trailer downtime?

A maintenance schedule reduces trailer downtime by finding wear before it becomes a roadside failure and by giving businesses a predictable way to plan repairs, parts and inspections. For commercial trailers, recording faults also makes recurring problems easier to identify.

A simple record can include:

Record	What to note
Date	When the inspection occurred
Odometer	Approximate towing distance
Trailer use	Trade, landscaping, farm, machinery or domestic
Tyres	Pressure, wear and condition
Bearings	Inspection or service completed
Brakes	Test, adjustment or repair
Lights	Faults and repairs
Suspension	Damage or component replacement
Structure	Rust, cracks or repairs
Parts	Part replaced and date
Next service	Planned inspection date

This is particularly useful for businesses running more than one trailer.

A recurring bearing issue, repeated tyre wear or brake problem is easier to spot when there is a maintenance history rather than a collection of invoices.

Owner Check vs Professional Service

Not every maintenance task should be treated as DIY work.

Task	Owner check	Professional service may be needed
Tyre pressure	✅	–
Visual tyre inspection	✅	✅ if damage is found
Light operation	✅	✅ for wiring faults
Coupling connection	✅	✅ for excessive wear
Safety chain condition	✅	✅ for replacement/attachment issues
Bearing noise/heat	✅	✅ for bearing repair
Brake operation	Basic check	✅ for repair/adjustment
Suspension visual check	✅	✅ for damaged components
Chassis visual check	✅	✅ for cracks/structural damage
Rust inspection	✅	✅ for structural corrosion
Bearing replacement	–	✅
Brake repair	–	✅
Structural welding	–	✅
Major electrical diagnosis	–	✅

The aim of a home inspection is to identify problems early, not to encourage owners to perform work they are not equipped or qualified to do.

Why a Trailer Maintenance Checklist Matters for Different Owners

A maintenance routine should reflect how the trailer actually works. A tradie carrying tools, a landscaper hauling wet green waste and a homeowner doing occasional tip runs place different demands on their trailers.

Tradies

Daily work means repeated loading, unloading and towing. Focus on tyres, brakes, coupling, lights, storage hardware, suspension and structural components.

Landscapers

Mud, wet green waste, soil and repeated short trips can create a harsh maintenance environment. Cleaning and corrosion checks deserve extra attention.

Construction Contractors

Plant and equipment create concentrated loads. Inspect ramps, tie-down points, chassis areas and running gear carefully.

Farmers

Rough paddocks and uneven ground can increase suspension and chassis stress. Inspect after demanding off-road use before returning to public-road towing.

Homeowners

Even occasional use requires a check before every trip. A trailer that sits for months is not automatically ready for a loaded journey.

What Trailer Parts Should Owners Keep an Eye On?

Owners should monitor wear-prone trailer parts including tyres, bearings, brake components, lights, wiring, coupling components, suspension parts, hinges, latches and fasteners. The exact replacement part must match the trailer and component specifications rather than being selected solely by appearance.

This is another reason to keep maintenance records.

If a part needs replacing, record:

• Part type
• Manufacturer or specification
• Date fitted
• Reason for replacement
• Trailer kilometres if known
• Any related repair

That information can make future trailer servicing more efficient and help identify whether a problem is isolated or recurring.

When Is Professional Trailer Servicing Worth It?

Professional trailer servicing is worthwhile when the trailer is used frequently, carries heavy loads, has brakes or hydraulic systems, travels long distances, operates on rough roads or develops a fault that cannot be confidently assessed during a visual check.

Roshar’s current website identifies Repairs & Maintenance as one of its service areas and offers trailer configurations ranging from box and cage trailers to plant, machinery, tandem, tipper and tradesman models.

For a business, the calculation is straightforward: planned maintenance is easier to manage than an unexpected trailer failure on a job.

A contractor with a trailer carrying equipment to a morning worksite has more to lose from a breakdown than a homeowner making an occasional weekend trip.

Conclusion

A good trailer maintenance checklist is simple enough to use regularly but detailed enough to catch problems before they become serious. Start with tyres, bearings, brakes, lights, coupling, suspension, structure, load area and corrosion, then adjust the inspection frequency to the way you actually use the trailer.

For Melbourne tradies, contractors, landscapers, farmers and businesses, Roshar Trailers provides trailer solutions alongside Repairs & Maintenance support. If your trailer needs inspection, servicing or repair, address the issue before it becomes the reason you miss the next job.

Need trailer servicing or trailer repairs in Melbourne? Contact Roshar Trailers to discuss your trailer and maintenance requirements.

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