Practical Recommendations for Semi Trailer Maintenance

A detailed guide to practical, real-world maintenance recommendations for semi trailers — covering braking systems, axle groups, electrical lines, lubrication, tyre care and structural checks.

Why Preventive Maintenance Matters

Semi trailers operate under continuously changing road conditions, high axle loads, and long-haul duty cycles. A good maintenance routine is essential to avoid unexpected downtime, reduce operational costs, ensure safety and extend trailer lifespan. Alura Trailer recommends following a structured maintenance plan covering \*daily, weekly, and long-interval inspections\*.

Daily / Pre-Trip Checks

Before each trip, operators should perform essential safety checks:

Tyre pressure & condition — look for cuts, flat spots, bulges
Air brake lines — inspect for leaks, loose couplings or damaged hoses
Lights & reflectors — ensure 100% visibility (ECE-compliant)
Landing legs — verify locked position and smooth crank operation
Fifth wheel connection — ensure kingpin is firmly engaged
Load securing — check chains, straps, twistlocks (for container chassis)

These steps reduce the risk of roadside failures and ensure that the trailer performs safely even in heavy-duty conditions.

Weekly / Operational Checks

These should be carried out by the transport team or workshop supervisor:

Brake system calibration — verify EBS/ABS functionality, check chambers & slack adjusters
Suspension system — inspect air bellows, mechanical suspension bushings, equalizers
Axle alignment — monitor abnormal tyre wear patterns
Electrical connections — inspect sockets, junction boxes, cable routing
Hydraulic components (for lowbeds) — check steering cylinders & hydraulic hoses

Regular inspection at this level significantly improves trailer stability and reduces wear on tyres and braking components.

Long-Interval Workshop Maintenance

Performed every 20,000–40,000 km depending on load type and road conditions:

Hub greasing or oil-check (drum/disc brake versions)
Complete brake overhaul — drums, pads, discs, chambers
Suspension bushing replacement — air or mechanical types
Full torque-checking of structural bolts — gooseneck, crossbars, suspension brackets
Welding inspection — check for cracks, deformation, corrosion
Frame coating & anti-corrosion treatment

Deep maintenance increases trailer service life and ensures operational reliability in construction, mining and long-distance transport fleets.