Servicing Pre-Adjusted Wheel Ends; Dos and Don’ts
Skill Level: Intermediate | Special Tools: None
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.
• Clean the hub and all components during routine service intervals and when maintenance is required.
• Inspect the bearings, seal, spacer and hub for unusual wear.
• Replace the seal whenever the hub is removed from the spindle.
• Replace all bearings and the spacer if they show signs of wear. To maximize performance, replace them at the same time. Try the Timken Set-Right™ Commercial Vehicle Hub Rebuild Kits listed below.
• Use the same type of lubricant or compatible OEM approved lubricant.
• Follow your hub supplier or OEM’s service recommendations and procedures.
• Use the exact Timken® NP part number replacement bearings with pre-adjusted systems.
• Use the spacer if you are converting your pre-adjusted hub to a manually-adjustable wheel end system.
• Use industry standard components for pre-adjusted systems. Always use OEM specified service parts for replacements.
• Reuse components that are damaged or excessively worn.
• Mix oils and greases.
Following these simple Do’s and Don’ts will help avoid safety problems and limit the amount of unnecessary wheel end maintenance.
Note: Hubs with spacers require the use of exact NP part number replacement bearings to achieve the correct system setting range. Industry standard part numbers may be used only if the spacer is removed and the bearings are manually adjusted.
TechTips is not intended to substitute for the specific recommendations of your equipment suppliers. Every reasonable effort has been made to ensure the accuracy of the information contained in this writing, but no liability is accepted for errors, omissions or for any other reason.