What Happens When Trailer Bearings Fail?

Whether you’re an occasional trailer tower or a seasoned road warrior, dealing with a bum trailer bearing can really put a damper on your travels. I found out that the hard way on a camping trip had gone awry a few summers back. One minute I was cruising down the highway, the next I was pulled over and staring at a smoking hub, my weekend plans crushed. 

In hindsight, I learned some valuable lessons about maintaining and preventing trailer-bearing failure that I want to pass on. This is why I’m here to chronicle my harrowing bearing breakdown tale, what causes these mechanical meltdowns, how to recognize impending trouble, and tips to keep your bearings in peak condition. 

So, lock ‘n load, hitch up, and let’s hit the road – hopefully with no bearing gremlins in tow! 

An Example of What Happens When Trailer Bearings Fail 

It started out as an exciting weekend camping at my favorite spot by the lake. After hitching up my travel trailer and doing a quick walk-around inspection, I hit the road. About 20 minutes into the trip, I started hearing a strange squeaking noise coming from the trailer. It steadily got louder until it was a loud grinding – never a good sign. I pulled over as soon as possible to investigate. 

Upon inspection, I could see the dust cap on the wheel hub was protruding out slightly. I attempted to wiggle the wheel and found there was a concerning amount of play. It was clear the bearings were shot, though I wasn’t sure how badly. With no choice but to limp carefully to a repair shop, I slowly made my way to the nearest town. 

What Are the Effects of Bearing Failure?

The initial squeaking and grinding noises alerted me to the problem. These noises indicate metal-on-metal contact. As I limped to the repair shop, the entire trailer had begun vibrating from the wheel wobble. This intense shaking can damage the floor and other trailer components. I later had noticeable abnormal tire wear on the edges where the wheel was rocking against the pavement. This leads to blowouts. If a wheel bearing fails completely at highway speeds, it could cause sudden loss of control, crashes, and serious injuries. 

Causes of Bearing Failure 

If I point out the overall causes that are culprits behind the bearing failure, here are they – 

• Bearings require frequent lubrication to prevent excessive heat and friction. If seals fail, lubricant can leak out. 
• Overloading the trailer can put extra stress on the bearings, causing them to wear out faster. 
• The bearings must be set to the proper preload specs. Too loose can allow play, and too tight can cause excess friction.  
• Dirt, water, and other contaminants can work their way into the bearings, accelerating wear. Good seals are essential. 
• Issues with these components can cause misalignment, uneven wear, and bearing damage. 
• Bearings do have a finite lifespan. Inspection and replacement at scheduled intervals reduce failure risk. 

What You Can Do to Prevent Bearing Failure?

After this experience, I was meticulous about monitoring and maintaining my trailer wheel bearings. Now I know it’s pretty important and I also want you guys to consider the factors regarding this properly. 

Factor 1: Have a mechanic remove the hubs annually to check bearings, races, seals, lubricant level, and condition. 

Factor 2: Be alert for any new sounds like squeaking or rumbling and have them investigated promptly. 

Factor 3: Grab the tire at the top and bottom and attempt to rock it. There should be hardly any movement. 

Factor 4: Use high-quality marine bearing grease and maintain the proper fill level. 

Factor 5: Replace cracked or damaged seals immediately to prevent lubricant leaks. 

Factor 6: Don’t overload your trailer, which puts extra stress on the bearings.  

Factor 7: You are the first line of defense against bearing failure. Stay alert! 

By staying on top of inspections, maintenance, and early issue detection, you can avoid the headaches and hazards of a trailer wheel-bearing failure. Don’t wait until you’re stranded on the side of the road like me! Take preventative action to keep your bearings in ship shape. 

Final Thought  

Trailer wheel bearings don’t often get much thought – until they unexpectedly fail. As I learned firsthand from my disastrous camping trip, defective bearings can swiftly lead to hazardous road situations. Staying diligent about inspections, and maintenance, and looking for early signs of issues is key to preventing breakdowns and safety hazards. With proper preventative care, your bearings will deliver many carefree miles of trailer towing. 

Common Related Questions 

• What are the symptoms that the bearings are going bad?   

Noise like squeaking or rumbling, detectable play when wiggling the wheel, visible damage to the seals, leaking lubricant, and overheating of the hub after running indicate potential bearing issues. 

• Can I avoid a roadside breakdown from a failed bearing? 

Staying proactive with inspections, maintenance, and replacing bearings at the first sign of wear is key. But you should always be prepared for a breakdown just in case with safety gear. 

• Do I need a mechanic to repack my trailer bearings? 

With the right tools and know-how, repacking bearings is a DIY job. However, for inexperienced owners, having a professional mechanical service for the bearings is recommended.