When trailer intervals should not copy tractor rules
Why Hong Kong haulage fleets get noisy overdue lists when trailers inherit tractor service intervals — and how to split the families cleanly.
Tractors accumulate kilometres and brake heat differently from the trailers they pull. Yet many service calendars still apply one interval family to both. The overdue board then lights up with trailer “failures” that mechanics know are calendar noise — while a genuine tractor brake job waits behind the false flags.
What we look for on a walkthrough
Ask which jobs always get deferred when the list is long. If trailers dominate that pile, the rules are almost certainly merged too tightly. Separate kilometre or calendar triggers by asset class, then keep a small shared list for coupling gear and lighting that truly apply to both.
A practical split
- Tractors: engine, transmission, and high-heat brake inspections tied to duty cycle.
- Trailers: axle, suspension, and body checks with their own calendar or kilometre bands.
- Shared: electrical and coupling items that belong on a joint weekly glance, not the same deep interval.
Once the families diverge, dashboard views become quieter — and the bay stops ignoring the board.