Trailers are simple machines, which is exactly why they get neglected. There’s no dashboard light, no service reminder, nothing that beeps at you. The trailer just sits in the yard until you need it, and then you hook up and go.
Then a bearing seizes forty miles from home on a Saturday. We see it constantly, and it is almost always preventable. Here’s the schedule we give customers — three lists, and none of them take long.
Before every haul: the five-minute walkaround
Do this every single time, even for a short run. Most roadside failures announce themselves here first.
- Tire pressure, cold. Trailer tires run at the pressure stamped on the sidewall, not whatever your truck uses. Underinflation is the number one cause of blowouts, and a trailer tire gives you almost no warning.
- Lug nuts. Check they’re tight. On new wheels or after any wheel has been off, re-torque at 10, 25 and 50 miles — loose lugs are how wheels leave trailers.
- Lights. Running, brake, and both turn signals. Have someone stand behind you or back up to a window at dusk.
- Coupler and chains. Latch fully seated and pinned, chains crossed under the tongue so they’d cradle it if it dropped.
- Breakaway cable. Clipped to the truck — not to the safety chains. If the chains go, a cable attached to them goes with it and the brakes never fire.
- Load secured and jack up. Obvious, and still the two most common things people forget when they’re in a hurry.
Every month, or every thousand miles or so
- Feel the hubs after a run. Pull over after twenty or thirty minutes and put a hand near each hub. Warm is fine. Too hot to touch means a bearing is failing, and you’ve just caught it before it stranded you. This is the single most useful habit on this page.
- Look at tire wear. Wear on one edge points at an alignment or axle problem. Cupping points at suspension. Even wear across the tread means everything’s fine.
- Test the brakes deliberately. On a quiet road, use the manual slider on your brake controller. You should feel the trailer pull the rig down on its own.
- Check the deck or floor. Soft spots, cracked boards, loose fasteners. Cheap to fix now, expensive when a load goes through.
Once a year, or every 12,000 miles
This is the list most owners skip entirely, and it’s the one that prevents the expensive failures.
- Repack or replace the wheel bearings. Non-negotiable. Bearings are the most common serious failure on a trailer and the cheapest thing on it to maintain.
- Inspect brake shoes and magnets. Magnets wear flat and stop grabbing long before you notice from the driver’s seat.
- Look over the suspension. Leaf springs, shackles, equalizers, U-bolts. Cracked springs are common on trailers that get loaded heavy.
- Walk the frame. Check welds around the tongue, the coupler and the axle mounts for cracks or rust getting serious.
- Replace the breakaway battery. It’s a small sealed battery that sits there for years doing nothing and then is expected to work once, in an emergency. Test it or swap it annually.
- Chase the wiring. Corroded grounds cause most mystery light faults. Clean connections beat new bulbs nine times out of ten.
Trailer tires age out long before they wear out
This one surprises people every time, so it gets its own heading.
Trailer tires — the ST-rated ones — usually die of old age rather than mileage. The rubber degrades from sun, heat, ozone and simple time whether you use the trailer or not, and a tire with plenty of tread left can still fail because the sidewall has gone hard and started to crack. Industry guidance is to replace them at roughly five to six years regardless of tread depth, and to lean toward five if the trailer lives outside in the South Carolina sun.
You can read the manufacture date off the DOT code on the sidewall: the last four digits are the week and year. “2823” means the 28th week of 2023.
The two failures we see most
Bearings and tires. That’s it. That’s the overwhelming majority of trailers that get towed in or called in from the shoulder, and both are on the annual list above. An hour of attention once a year prevents nearly all of it.
If you’d rather not do it yourself
Our service department in North Augusta handles bearings, brakes, wiring, suspension and tires on any trailer, not just the ones we sold. Bring it in once a year and it comes back road-ready.
We’re at 5950 Jefferson Davis Highway. Call (803) 844-3242 to get on the schedule. And if you’re still shopping, sizing and towing capacity are the two things worth settling before you buy.