Basic Maintenance Items and Intervals
Maintaining a semi-trailer is akin to a human medical check-up; it requires regular, component-specific inspections. For chassis lubrication points, it is recommended to replenish specialized grease every 30,000 kilometers to prevent abnormal wear on connecting components. The braking system requires an air-line leak test every 20,000 kilometers, at which time the air dryer cartridge should also be replaced. Electrical connectors require anti-oxidation treatment every six months, and particular attention should be paid to protecting the wiring harness before and after the rainy season.
Flexible Adjustments for Specific Operating Conditions
Mountainous Transport: Brake pad wear accelerates; the inspection interval should be shortened to every 15,000 kilometers.
Gravel/Dirt Roads: The cleaning frequency for the air filter should be doubled.
Cold Chain Transport: Hydraulic landing gear requires a monthly antifreeze penetration test.
High-Salinity Environments: The chassis undercoating (armor) should be touched up with an anti-rust coating every quarter.
Easily Overlooked Maintenance Details
The optimal maintenance window for axle bearings falls between 60,000 and 80,000 kilometers; replacing them too early incurs unnecessary costs, while delaying replacement too long risks causing a wheel lock-up. Inspections for wear on tarp hooks should be incorporated into the monthly maintenance routine, as a sudden breakage can lead to cargo spillage or overturning. Before the onset of winter, it is imperative to completely drain any water remaining in the water tank; the cost of repairing frozen and burst pipelines can be ten times higher than the cost of prevention. For long-term parking, it is recommended to use jacks to support the suspension system to prevent plastic deformation of the leaf springs.
