How Often Should Trailer Wheel Bearings Be Serviced?
A practical bearing maintenance guide for Phoenix truckers and trailer owners, from Fast & Furious Trailer Repair. Call or text (623) 707-9373.
Quick answer: Follow the maintenance schedule from your axle and hub manufacturer first, since it differs between oil-bath hubs, grease-packed hubs and sealed or extended-service hub systems. As a general rule, small utility and equipment trailers with grease-packed bearings are commonly inspected and repacked about once a year or every 10,000 to 12,000 miles, and sooner if the trailer sits a lot or gets submerged. Semi trailers should have hub oil levels and seals checked at every pre-trip and their hubs inspected at each preventive maintenance service.
Wheel bearings are small parts with a big job. When one fails, it can overheat, lock up, damage the spindle or, in the worst case, let a wheel come off. Phoenix heat, long highway runs on I-10 and I-17, and trailers that sit for weeks at a time all make bearing maintenance important.
It depends on the hub type
Grease-packed bearings
Common on utility, car hauler, boat and many equipment trailers. The grease breaks down over time and with heat, and seals wear out. These are usually cleaned, inspected and repacked on a regular schedule.
Oil-bath hubs
Common on semi trailers. Oil levels can be checked through the clear hubcap window at each pre-trip. Low or milky oil, or oil on the inside of the wheel, means a seal or hub needs attention.
Sealed or extended-service hubs
Many newer semi trailers have hub systems designed to go much longer between services. They still need inspection, and the manufacturer's interval is what to follow.
Things that shorten bearing life
- Overloading the trailer
- Heat from long runs, hot pavement and dragging brakes
- Water getting into the hub, from washing, rain or a boat ramp
- Trailers that sit for long periods, letting grease separate and seals dry out
- A failed seal leaking oil or grease
- Bearings that were adjusted too tight or too loose
Warning signs a bearing needs attention
- A hub that is much hotter than the others after a run
- Grinding, growling or squealing from a wheel
- Wobble or play when you rock the tire at the top and bottom
- Oil or grease slung on the inside of the wheel or tire
- Uneven tire wear
- Smoke or a burning smell from a wheel end
Our FAQ covers more signs of a bad trailer wheel bearing. If you notice any of them, get the trailer checked before the next load.
What a hub and bearing service includes
A typical service involves removing the hub, cleaning and inspecting the bearings and races, checking the spindle, replacing seals, repacking or refilling with the right lubricant and adjusting bearing end play correctly. Damaged bearings, races or hubs are replaced.
Add bearings to your walk-around
Feel hubs for heat at stops, look through hub windows for oil level and color, and look for leaks on the inside of the wheels. The trailer inspection checklist covers the rest of the trailer.
Bearing and hub work in Phoenix
Fast & Furious handles axles, hubs and bearings for semi and reefer trailers and utility and equipment trailers. See trailer axle repair in Phoenix, Tolleson and Goodyear.
Common questions
Should I grease my trailer bearings with a grease gun?
Some hubs have fittings designed for that, but adding too much grease can push past seals. Follow the hub manufacturer instructions, or have the hub serviced.
Can I keep driving on a noisy wheel bearing?
It is not worth the risk. A failing bearing can overheat and seize. Get it inspected before the next load.
How do I get my trailer in?
Call or text (623) 707-9373 with the trailer type and what you are seeing.
Get your hubs and bearings checked
Fast & Furious Trailer Repair is a trailer repair shop at 6639 W Fulton St in Phoenix, working on semi, reefer, flatbed, utility, car hauler and equipment trailers for carriers and owner-operators from Tolleson, Avondale, Goodyear, Glendale and across the Valley. Call or text (623) 707-9373 or use the contact page.
Still have a question?
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