Articles and videos focusing on diagnosing and troubleshooting problems related to heavy duty engines.

Importance of Proper Wheel Bearing Adjustment

Premature bearing failure impacts the efficiency of a fleet and has serious performance, safety and budgetary implications. Proper wheel bearing adjustment is a key factor in reducing premature bearing failure. In heavy duty wheel-end applications, the ideal bearing end-play setting should be between 0.001” and 0.005” for optimal bearing life.


Best Practice When Replacing Bearings and Races

When it comes to replacing bearings and races, NTN has a couple of recommendations we make to installers to ensure that our products meet their maximum life expectancy. When replacing the bearing and race, NTN encourages installers to: 1) Replace both components as a set 2) Ensure both components come from the same manufacturer Replace…


Bearing Components: Case vs. Through Hardening

What’s the Difference? Bearing components must have hardened rolling surfaces in order to provide long life. In general, there are two ways to harden steel to the required level: Through Hardening and Case Hardening. Through Hardening In order to harden steel, the iron mix must contain a certain amount of carbon. Carbon dissolves in molten…


Industry Accepted Maintenance Practices

To increase application performance and help ensure safety, refer to these “Technology & Maintenance Council (TMC) Recommended Maintenance Practices (RPs)” when handling wheel or drivetrain bearings.


Nut Torquing and Back-Off to Set Wheel Bearings

Follow this six-step procedure for nut torquing and back off to adjust wheel bearings to meet correct end play specifications.


Monitoring Wheel End Setting In Adjustable Wheel Bearing Systems

hen adjusted properly, wheel end setting should not change significantly during early operation. Over time, wear causes small changes, which worsen with poor cleanliness and improper maintenance practices. For proper wheel end cleaning and maintenance procedures, refer to TMC RP 622.


Servicing Pre-Adjusted Wheel Ends; Dos and Don’ts

To service pre-adjusted wheel ends and maximize performance, follow the DOs and DON’Ts below. Note: A spacer between the inner and outer bearings can identify a pre-adjusted wheel end.


Replacing Cups and Cones Together

Skill Level: Easy | Special Tools: None Timken recommends replacing the bearing cone (inner race) and bearing cup (outer race) at the same time and that both components come from the same manufacturer. Avoid Mixing Parts from Different Bearing Manufacturers Common Problems Caused By Mixing Parts • Incompatible internal bearing profile • Overall bearing width…


Installing a Timken Set-Right Preset Bearing

You can keep your trucks running smoothly by replacing the wheel end bearings using the manufacturer’s recommended schedule. In this video, you’ll see how to install a set-right preset bearing.


Adjusting Heavy Duty Wheel Bearings

As you can figure out from their name, preset bearings don’t require any setting or adjusting. If you’re not using a preset bearing, you have to adjust the bearings to create the right clearance between the inner and outer races.


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