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Technical Bulletins

Raybestos offers technical bulletins that cover various brake conditions that are known to occur in vehicles. These bulletins can help you troubleshoot a problem when a vehicle is in your shop and help you find a solution.

In each technical bulletin, you will find the following information:

  • Subject line
  • Vehicle(s) Involved
  • Condition
  • Repair Procedure

Search Technical Bulletins

20-02: The Importance of Using OEM-Matched Aftermarket Pads

See a clear example of why you should always purchase OEM-matched aftermarket brake parts. 

20-01: Pedal Pulsation Caused by Moisture Buildup

A discussion of how excessive moisture build-up can lead to a pedal pulsation over time. 

19-05: Brake Fluid Contamination

How mistakenly putting petroleum-based fluid in your master cylinder can cause problems with your brake system. 

TB 19-04: Intensive Wheel Hub Cleaning Process

A discussion about why cleaning wheel hubs is so important during a brake job, and what tools can help with extremely rusty hubs.

TB 19-03: Low Brake Pedal Caused by Bad Wheel Bearing

A discussion about how a low brake pedal may not always be caused by a problem in the hydraulic system. 

TB 19-2: Brake Booster Checks and Tests

Troubleshoot a hard brake pedal with these brake booster checks and tests. 

TB 19-1: Brake-Noise-Discussion

How to properly identify brake noises and know what’s causing them.

TB 18-18: Brake Hose Inspection Checklist

How to properly inspect a brake hose both internally and externally. 

TB 18-17: Pedal Pulsation Causes

A discussion about the cause of pedal pulsation and how to fix it. 

TB 18-16: Floating Caliper vs. Fixed Caliper Operation

A discussion on how a fixed caliper operates vs. a floating caliper. 

TB 18-15: Diagnosing a Low Brake Pedal with an Isolation Test

How to perform an isolation test/line lock test to properly diagnose a spongy brake pedal.

TB 18-14: Removing a Rear Rotor Stuck on the Parking Brake

A discussion about how to remove a rear drum-in-hat rotor that is stuck on the parking brake. 

TB 18-13: Brake Pad Wear Sensors Discussion

A discussion about the different types of brake pad wear sensors. 

TB 18-12: The Importance of Torquing Lug Nuts

A discussion about the problems that can occur if lug nuts aren't torqued evenly and to specifications. 

TB 18-11: Inspect and Clean Caliper Brackets

A discussion about how to properly inspect and clean a caliper bracket to avoid brake noise, brake pull and/or premature/uneven pad wear. 

TB 18-10: Clogged Brake Hose

A discussion about how overheated brakes, brake drag or premature brake wear can actually be caused by a clogged brake hose as opposed to a problem with the caliper. 

TB 18-09: Multiple Hardware Kits with Brake Pads

A discussion about how to identify the correct hardware for your application when multiple hardware kits come in the box with your brake pads. 

TB 18-08: Drum Brake Hardware Discussion

Discussing the different types of rear brake hardware, what their function is and why it is always important to replace drum brake hardware during a rear brake job. 

TB 18-07: Ford Focus Part #9759 Rear Brake Drum Replacement

A discussion about the proper replacement procedure for a 2000-2008 Ford Focus rear brake drum.

TB 18-06: Brake Job Tools

Discussing the tools you need to perform a quality brake job. 

TB 18-05: Installing Brakes That Use Drag Reduction Clips

How to use a C-clamp to install brakes that use drag reduction clips. 

TB 18-04: Properly Remove a Caliper You Are Reusing

How to properly remove a caliper during a brake job when the caliper is OK to reuse. 

TB 18-03: Preventing a Frozen Brake Cable

Condition: Parking Brake Cable is Frozen

TB 18-02: Frozen Wheel Cylinder

How to figure out if a frozen wheel cylinder is the cause of rapid front brake wear/a loss of braking. 

TB 18-01: Checking Caliper Piston Operation

How to properly inspect a caliper piston's operation to ensure the square cut seal is working properly. 

Master Cylinder Fluid Levels

A discussion about what to do if the brake fluid levels in your master cylinder reservoir are too high or too low. 

Inspecting Brake Fluid

A discussion about inspecting your brake fluid, testing your brake fluid for moisture content and diagnosing the cause of low fluid levels. 

Comparing Different Types of Brake Fluid

A discussion about the different types of brake fluid and their distinguishing characteristics. 

ABS light on or false ABS activation after wheel bearing hub replacement

What to do when the ABS light is on or there is a false ABS activation after a wheel bearing hub replacement.

Intermittent Brake Pull

How to diagnose and correct the cause of brake pull.

Rotor looks to have “hot spots” on surface

A discussion about “hot spots” on a rotor's surface. 

Safety issues using lightweight rotors

A discussion about the safety issues of using lightweight rotors. 

Checking Rotor Runout Correctly

How to properly check rotor runout. 

Electrical Circuit Repairs and Replacing Components

How to repair or attach a wire to a circuit. 

Brake Pedal Pulsation 2-4,000 miles after brake service

A discussion about the cause of brake pedal pulsation 2-4,000 miles after brake service.

Importance of On-Vehicle Brake Lathe Use

A discussion about the importance of on-vehicle brake lathe use. 

Electrical Circuit Repairs

A discussion about electrical circuit repairs.

Low-Sinking or Spongy Brake Pedal

How to fix a low-sinking or spongy brake pedal. 

Hard braking when cold, lack of power assist

How to fix hard braking/lack of power assist in cold weather. 

Slow speed ABS false modulation

How to fix slow speed ABS false modulation on SUVs and Light and Medium Duty Trucks. This is a revision of bulletin 02-02.

Brake Noise, Vibration and Harshness

A discussion about brake noise, vibration and harshness

Brake Pad Burnishing

 Brake Pad Burnishing on Severe Duty Applications

Hybrid Vehicle Safety Precautions

A discussion about the safety precautions you need to take before servicing a hybrid vehicle.

Master cylinder bench bleeding

How to bench bleed a step bore master cylinder. 

Testing Magneto Resistive Wheel Speed sensor

How to troubleshoot the magneto resistive wheel speed sensor.

Brake hose restriction

How to identify brake hose restriction. 

Brake Pad puck (lining) Shearing

A discussion about the causes of brake pad puck (lining) shearing. 

Proper Use of Brake Pad lubricants

How to properly use brake lubricants.

Friction technology

A discussion about the development, refinement and implementation of Raybestos friction technology. 

Cleaning Rotors

How to properly clean a new or machined rotor before installation. 

Pressure Bleeders

How to purge air and contaminates from a hydraulic system with a pressure bleeder.

Caliper Service

A discussion about the features and benefits of rebuilt calipers. 

Noise / Brake pull / Pulsation complaints could be related to bearing failure:

How noise, brake pull and/or pulsation could be caused by bearing failure and how to identify it.

Brake Pulsation

A discussion about the cause of pedal pulsation. 

Calibration of Bench-Type Lathes

How to calibrate a bench-type brake lathe. 

Rotor Lateral Runout Specifications

How to check the lateral runout on a rotor. 

Brake Lubricant, what to use and where

A discussion about brake lubricant, including what to use and where to use it. 

Variable reluctance Wheel Speed Sensors

A discussion about variable reluctance wheel speed sensors. 

Passive and Active wheel speed sensors

A discussion about passive and active wheel speed sensors.

Torque limiting sockets (torque stick)

A discussion about torque limiting sockets (torque sticks).

Pedal pulsation after brake service

How to fix lateral runout causing pedal pulsation one to 12 thousand miles after a brake service. 

Low/Spongy Brake Pedal Causes

How to diagnose the cause of a low/spongy brake pedal with an isolation test. 

Braking Principles

A discussion about the basic principles of braking. 

Ceramic Brake Pads

A discussion about ceramic brake pads. 

Easy Rear Drum Brake Service

A quick tip that makes service to rear drum brakes easier.

Rotors and pads determine Brake Operating Temperature

How to maintain a safe brake temperature.

Minimizing Brake Dust on wheels

How to minimize brake dust on wheels. 

Voltage Drop Tests

A discussion about voltage drop tests.

Source voltage

How to see if low source voltage is causing your ABS system to malfunction. 

RWAL/RABS Valves Restricting Fluid Flow To The Rear Brakes

How to diagnose if the RWAL/RABS valves are restricting fluid flow on Kelsey Hayes rear wheel ABS systems.

On-The-Car Brake Lathe

A discussion about on-the-car brake lathes.

Digital Volt OHM Meters

A discussion about digital volt-ohm meters (DVOM) and its importance in diagnosing electrical and electronic problems.

Brake Pulsation front or rear?

How to determine if brake pulsation is coming from the front or rear in vehicles with four-wheel disc brakes. 

Brake Fluid Integrity

A disussion about how brake fluid can cause corrosion in your hydraulic system over time. 

Infrared Thermometer used to evaluate brake system efficiency

A discussion about infrared thermometers and how they are used to evaluate brake system efficiency.

Brake Service Lubrication Disc & Drum Applications

A discussion about lubrication and where to locate lubrication points.

Resurfacing Drilled and Slotted Performance Rotors

How to resurface drilled and slotted performance rotors. 

Brake Rotor Lateral Runout Correction Plates

How to fix rotor lateral runout with correction plates. 

Brake Lathe Maintenance Tips

Tips on brake lathe maintenance. 

ABS Equipped Vehicles / On car Lathe

How to use an on-car lathe with ABS-equipped vehicles. 

Manual Transmission Clutch Replacement Concerns

A discussion on the concerns surrounding manual transmission clutch replacement.

Misleading ABS Codes from Improper Voltage

How improper voltage can lead to misleading ABS codes.

Sanding Drums and Rotors

A discussion on why sanding drums and rotors is NOT recommended. 

Slow speed ABS false modulation

How to resolve slow-speed ABS false modulation.

Disc brake squeal after brake reline

How to diagnose the problem of disc brake squeal after brake reline. 

Quick check for rear brake shoe contact area

How to do a quick check for rear brake shoe contact area.

Dragging brakes on lifted trucks

How to fix brake drag on lifted trucks. 

Non-Ferris Ceramic Brake Pads Originally Equipped or Back

A discussion about non-ferris ceramic brake pads.

Wheel Speed Sensor Testing

Test procedures for wheel speed sensor testing. 

Brake Bleeding

A discussion about brake bleeding.

High Performance/Fleet duty Rotors

How to resurface high performance/fleet duty rotors.

Low brake pedal isolation procedure

How to perform an isolation test when you have a low brake pedal.

Lubricating Brake Components

A discussion about brake lubricants.

Brake Bleeding Methods

A discussion about the three most common methods used to bleed brakes. 

Problems Cause by Corrosion on Calipers

A discussion about how corrosion on your calipers can cause problems with your brake system. 

Problems Caused by Corrosion on Rotors

A discussion about how corrosion on your rotors can cause problems with your brake system.