Maintenance checklist for trucks & trailers
A short routine beats expensive breakdowns. Use this as a reusable checklist before long hauls and after rough jobs.
Why small checks matter
Most trailer failures announce themselves early: a soft tire that was “a little low,” a plug that only works when twisted, a coupler latch that needs a hammer. Catching those on the driveway takes minutes; catching them on a shoulder takes hours and sometimes a tow.
Build a habit: same order every time, phone flashlight ready, and a notebook or phone note for issues that are not blocking but need a shop day.
Every trip
- Tire pressure on truck and trailer; look for bulges, nails and uneven wear.
- Lug torque if wheels were recently serviced.
- Lights, markers, brake lights, turn signals — walk-around with a helper or reflective surface.
- Coupler locked, pin/clip in place, chains crossed under the tongue.
- Breakaway cable attached; electric-brake battery charged.
- Load securement: straps rated, no soft spots, no loose tools on the deck.
Monthly / seasonal
- Grease hubs and hinges per the trailer maker’s schedule.
- Inspect wiring harness for chafing; dielectric grease on plugs.
- Look for frame cracks, spring wear, hangers and equalizers.
- Check coupler wear, latch spring tension and lock pin fit.
- Wash salt and mud out of brakes and undercarriage after winter or coastal runs.
- Verify spare tire pressure and jack access if you carry them.
Deep-service items
At least once a season — or after a hard off-pavement job — plan a longer service block:
- Pull hubs if mileage or heat history says it is time; replace seals instead of hoping.
- Measure brake shoe wear and magnet condition; adjust or replace before metal-on-metal.
- Inspect deck boards, welds and crossmembers for rot or cracking.
- On the truck: transmission fluid history, cooling system, and tow-mode settings if equipped.
Hot hubs after a short drive are a stop-now signal. Let them cool, then investigate bearings and brakes before the next mile.
Pair this checklist with our road safety notes and the buying guide if you are evaluating a used unit’s service history.