May 1 2024
Hubba Hubba: How to Replace Trailer Hubs Like a Pro

Maintaining the hubs of your trailer is essential for ensuring smooth and safe operations, especially when transporting heavy loads with enclosed trailers, flat deck trailers, and dump trailers. This guide will help you identify when your trailer’s hubs need replacing—a key aspect of trailer maintenance that can prevent roadside failures and extend the life of your trailer. Understanding when and how to replace trailer hubs not only keeps your trailer in optimal condition but also enhances safety for you and other road users.

Understanding Trailer Hubs

What is a Trailer Hub?

A trailer hub is a crucial component located at the center of a wheel. It serves as the mounting assembly for the wheel itself and is critical for the axle’s connection to the wheel. Hubs are designed to support the wheel’s rotation and bear the weight of the trailer’s load, ensuring smooth travel.

Types of Trailer Hubs

Trailer hubs vary depending on the type of trailer and its usage:

  • Enclosed Trailers: Often use hubs that are designed for high durability and prolonged protection against road debris and moisture.
  • Flat Deck Trailers: These trailers require hubs capable of handling heavy loads and frequent use, with a focus on robust bearing capacities.
  • Dump Trailers: Hubs for dump trailers are built for heavy-duty applications, typically featuring enhanced sealing capabilities to prevent contamination from dirt and debris, which are common in rougher environments.


Understanding the specific needs of your trailer type ensures the correct hub is selected, promoting longevity and reliability of your trailer’s performance.

Preparing for Hub Replacement

Before initiating the hub replacement process, it’s crucial to gather the necessary tools and materials and implement essential safety precautions.

Tools and Materials Needed

Ensure you have the following tools and materials at your disposal:

  • Jack and jack stands for safely elevating the trailer
  • Lug wrench or impact wrench for removing lug nuts
  • Hammer or rubber mallet for tapping stubborn components
  • Screwdrivers and pliers for various tasks
  • New hub assembly to replace the old one
  • Grease gun and grease for lubricating components
  • Clean rags or towels for wiping surfaces


Having these items readily available will facilitate a smoother replacement process and minimize potential delays.

Safety Precautions

Prioritize safety throughout the replacement procedure by adhering to these precautions:

  • Park the trailer on a level surface and securely chock the wheels to prevent any unintended movement.
  • Wear appropriate safety gear, including gloves and safety glasses, to protect against potential hazards.
  • Utilize jack stands to support the trailer securely before working underneath it.
  • Exercise caution when handling heavy components, such as the wheel and hub assembly, to avoid injury.


By following these safety measures, you can create a secure working environment and mitigate the risk of accidents during the hub replacement process.

Step-by-Step Guide to Replacing Trailer Hubs

Replacing trailer hubs requires precision and attention to detail. Follow these steps to ensure a successful replacement process:

1. Removing the Old Hub

Start by safely elevating the trailer using a jack and supporting it with jack stands. Remove the lug nuts securing the wheel to the hub using a lug wrench or impact wrench. Carefully detach the wheel from the hub and set it aside. Next, remove the dust cap from the hub by gently prying it off with a screwdriver. Once the dust cap is removed, you’ll have access to the retaining nut, cotter pin, and castle nut. Remove the cotter pin and castle nut, then slide the hub assembly off the axle spindle.

2. Installing the New Hub

Before installing the new hub, thoroughly clean the spindle and surrounding area to remove any dirt or debris. Apply a layer of grease to the spindle to ensure smooth operation. Slide the new hub assembly onto the spindle, ensuring it fits snugly. Secure the hub in place by tightening the castle nut and securing it with a new cotter pin. Replace the dust cap by tapping it gently into place with a hammer or rubber mallet.

3. Post-Installation Checks

After installing the new hub, perform a thorough inspection to ensure everything is correctly aligned and secured. Check the tightness of the lug nuts to ensure they are properly tightened. Spin the wheel by hand to ensure it rotates smoothly without any wobbling or resistance. Finally, lower the trailer back onto the ground and remove the jack stands.

Following these steps will help you replace trailer hubs like a pro, ensuring smooth and safe trailer operation.

Troubleshooting Common Issues

Even with careful installation, issues may arise during or after hub replacement. Here’s how to troubleshoot some common problems:

Recognizing Installation Errors

If the wheel wobbles or feels loose after installation, it could indicate:

  • Improper Alignment: The hub may not be seated correctly on the spindle. Ensure the hub is centred and properly aligned before tightening the castle nut.
  • Insufficient Grease: Lack of lubrication can cause excessive friction and premature wear. Disassemble the hub and apply additional grease to the bearings.

Bearing Noise or Overheating

If you notice unusual noises or excessive heat coming from the hub, it may be due to:

  • Improper Bearing Preload: The bearings may be too tight or too loose. Adjust the preload according to manufacturer specifications.
  • Contaminated Bearings: Dirt, water, or old grease can cause bearing failure. Clean and inspect the bearings, replacing them if necessary.

Wheel Drag or Lockup

If the wheel drags or locks up while rotating, consider these potential issues:

  • Brake Adjustment: Incorrect brake adjustment can cause the brakes to engage prematurely. Adjust the brakes to ensure proper clearance.
  • Hub Misalignment: Misalignment between the hub and axle can lead to binding. Realign the hub to the axle and ensure proper seating.

When to Seek Professional Help

If you encounter persistent issues or lack the necessary tools and expertise to troubleshoot, it’s best to seek professional assistance. A qualified technician can diagnose and resolve complex problems, ensuring your trailer operates safely and efficiently.

By addressing these common issues promptly, you can prevent further damage and ensure optimal performance from your trailer hubs.

Final Thoughts

Replacing trailer hubs is a critical aspect of trailer maintenance that ensures safe and reliable operation. By following the step-by-step guide outlined in this blog, you can confidently replace trailer hubs like a pro, enhancing the performance and longevity of your trailer.

Remember to prioritize safety throughout the replacement process and adhere to recommended maintenance practices to prevent issues down the line. Regular inspection and maintenance of trailer hubs are essential to detect and address potential problems early, minimizing the risk of roadside failures and costly repairs.

For all your trailer maintenance needs, including hub replacement and other services, check out MVTR’s services page. Our team of experts is here to provide professional assistance and ensure your trailer remains in top condition for years to come.

Stay tuned for our next blog, where we’ll discuss how to choose the right trailer winch for your needs. Visit our homepage for more information on our products and services.

Equip yourself with the knowledge and skills to replace trailer hubs with confidence, and enjoy worry-free travels on the road.

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