Tech Tip: ABS Light On Or False ABS Activation After Wheel Bearing Hub Replacement
If you diagnose a bad hub bearing on one side of a vehicle, and the ABS wheel speed sensor or tone ring is integral to the bearing, you may need additional repairs to restore proper ABS functioning. In many cases, replacing one hub bearing will cause the driver to feel ABS false activation when coming to a slow stop on dry pavement.
Understanding Wheel Bearing Seals
A seal must always be installed so that the sealing lip is facing the fluid to be sealed. This is because the lip is made so that pressure applied to it from the “wet” side of the seal will tend to increase the pressure the lip applies to the shaft. If the seal is installed backwards, pressure acting on the “wrong” side of the lip will cause it to lift from the shaft, resulting in leakage. On most seals, the correct side is obvious; however, on others it is not.
Is Replacing Wheel Bearings in Pairs Ethical?
Replacing wheel bearings on both sides of a vehicle used to be standard procedure as it was economical insurance against a comeback. In those days, a set of bearings and races could be purchased under $5 a side, including the seal. A technician worth his salt could install and adjust a set of bearings in
Wheel Bearing Noise Diagnostics
The classic symptom of a bad wheel bearing is typically a cyclic chirping, squealing or growling noise that changes in proportion to vehicle speed. The sound may disappear at some speeds or only occur at certain speeds. The noise may get worse when turning, or it may disappear momentarily. So, it’s difficult to make a
False ABS Activation After Wheel Bearing Hub Replacement
Vehicles: All ABS-equipped vehicles Condition: Vehicle had wheel bearing hub replaced on one side. Repair Procedure: If you diagnose a bad hub bearing on one side of a vehicle and the ABS wheel speed sensor or tone ring is integral to the bearing, you may need additional repairs to restore proper ABS functioning. In many
Spotting wheel bearing failure
Wheel bearing failure, regardless of the type of wheel bearing, may not give much warning notice and can also be tricky for the customer to describe. When a customer comes to you with complaints, start by writing down all of their problems and concerns. Then, ask questions related to the customer’s concerns so that you
Wheel Bearings: Measurement and Torque
Wheel bearings are either of the ball or tapered roller variety. Front wheel bearing applications are an angular-type ball bearing, which will accept greater thrust loads than a Conrad-type bearing, and will accept a 100 percent load in the radial or thrust position and any combination of a 100 percent load. A tapered roller bearing
Cartridge-Style Wheel Bearing Inspection, Installation Nuances
More and more vehicles are being equipped with cartridge-style wheel bearings — a style that requires a lot more labor to replace when compared to hub units or tapered roller bearings. What’s new? What should you watch for? While the fundamentals of the job have not changed since the 1980s, what has changed is the
Diagnosing Hyundai Wheel Bearing Failure
While wheel bearing noise is one of the toughest problems for the customer to describe, it’s not unusual for it to come on so gradually that the customer may not even notice it until you mention it after an unrelated road test. Many times, the customer complaint will send you down the wrong path if you let it.
Hyundai Feature: Drivetrain Noises And Wheel Bearing Replacement
Don’t let customers lead you down the wrong diagnostic path. While wheel-bearing noise is one of the toughest problems for customers to describe, says Import Specialist Contributor Bob Dowie, it’s not unusual for it to come on so gradually that the customer may not even notice it until you mention it after an unrelated road test.