Tech Tip: Wheel Bearing Diagnostics and Replacement Guidelines

Tech Tip: Wheel Bearing Diagnostics and Replacement Guidelines

The following procedures, provided by SKF, may help determine the root cause of bearing failure and eliminate future premature failures.

The below procedures may help determine the root cause of bearing failure and eliminate future premature failures.

Inspect Bearings Prior to and During Removal
Dirt, moisture and inadequate lubrication may indicate a damaged seal or that the bearing was installed without an adjacent seal.

Look for any sign of indentations on the outer or inner ring of the bearing. Denting signs indicate a hammer may have been used directly on the bearing during installation. Small fragments can infiltrate the bearing and can lead to particle contamination of the bearing.

Look to see if the bearing was properly seated. Misalignment will cause early failure.

Rust spots at the contact points of a press-fit bearing may indicate that the lubricant is not the same as that used on the rest of the vehicle, or that lubrication was inadequate during installation. Evidence of excessive heat and wear on a press-fit bearing may indicate that the press-fit of the inner race over the shaft is too tight.

Evidence of friction, overheating, excessive wear or contact erosion between the shaft and the inner race on a slip-fit bearing may indicate that the slip-fit is too loose.

Removal and Installation of Bearings
Use only recommended tools for removal and installation of seals and bearings.

Work only with clean tools, hands and environments to avoid contamination of the bearing.

Shaft seats and housing bores should be clean, smooth and have the correct dimensions.

Leave bearings packaged until ready for assembly. Do not remove lubricant.

Use only manufacturer-recommend greases. Also consult the vehicle service manual to see if additional grease should be added to the bearing; this may vary by bearing type.

Lubricate the race that will be press-fit and the shaft or housing seat on which it will sit.

Mount the bearing onto the shaft with the rounded corner of the race going on first.

Apply even, driving pressure directly only to the race being press-fit. Make sure the pressure is straight and square.

Never hammer directly on races or rollers. Do not use a wooden or soft metal mallet, as chips or splinters may enter the bearing.

Use quick taps rather than heavy ones.

Be sure all driving accessories and fixtures have straight, square ends.

Drive races solidly up against the shoulder of the shaft and housing.

Verifying Correct Adjustment
Ensure that the bearing is seated squarely on the shaft and has not been cocked or misaligned when mounted.

Pre-load bearings with correct specification when it is necessary to hold shafts, gears or spindles absolutely rigid.

Consult the vehicle manual to determine whether to use a single or double adjusting nut.

Inspect the endplay with a dial indicator. Wheel bearings in automobiles often are set with an endplay of .001 inch to .010 inch.

Courtesy of SKF

You May Also Like

Bosch Auto Service Franchise Program Expands Workshop Management Solutions for Service Shops

Bosch Auto Service Franchisees will receive exclusive access to Tekmetric’s software suite and customized training for seamless integration.

Bosch Automotive Workshop Services LLC (Bosch Auto Service) announces its collaboration with Tekmetric, an auto repair technology company specializing in cloud-based shop management solutions. This collaboration will elevate operations and service quality for Bosch Auto Service Franchisees, the company said.

Bosch Auto Service Franchisees will benefit from increased productivity, profitability and improved customer experience through the Tekmetric suite of solutions, which includes an all-encompassing shop management solution with integrated payments, technology integrations, real-time data and reporting, inventory management, parts ordering and more.

Toyota Invests in EV Charging Network IONNA

IONNA plans to install at least 30,000 charging ports in North America by 2030, and stations will include both NACS and CCS connectors to support all BEV drivers.

K-Tool International Celebrates 40th Anniversary 

K-Tool International Celebrates 40th anniversary at Tool Dealer Expo with show promotions and prizes.

Wallbox Announces the Launch of Faster Charger

The newest addition to the product family is designed to charge at up to 220 kW.

Autel MaxiSYS Ultra Enhances Efficiency At Mighty Auto Pro

Time is money in vehicle repair, and the Autel MaxiSYS Ultra is all about enhancing technicians’ diagnostic prowess.

Other Posts
Road to AAPEX Ep. 1: The Future Legacy of the Automotive Aftermarket

Travel a new Road to AAPEX this season by watching the first episode in this year’s Road to AAPEX series.

Snap-on Adds Compact Head Options to Ratchet Lineup

Two new 3/8″ Drive Dual 80 Technology Soft Grip ratchets are designed for use in low torque, tight access applications.

Hunter RX Series Scissor Lift: Harsh-Duty Option

The RX Scissor Lift Harsh Duty Option is built for the Rust Belt with a zinc primer base and epoxy-filled joints to protect against salt and corrosion.

Volvo Cars Starts Production of Fully Electric EX90 SUV

The EX90 is based on its next-gen EV technology base, with a fully electric range of up to 372 miles.