21PBE – TSE Brake Chamber Air Leak – 2021 Peterbilt 348 & 579

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May 10, 2021 NHTSA CAMPAIGN NUMBER: 21V328000

Spring Brake Chamber Assembled Incorrectly

The pressure plate may tear the diaphragm, causing a loss of air pressure and increasing the risk of a crash.

 

NHTSA Campaign Number: 21V328

Manufacturer PACCAR Incorporated

Components SERVICE BRAKES, AIR

Potential Number of Units Affected 13

 

Summary

PACCAR Incorporated (PACCAR) is recalling certain 2021 Peterbilt 348 and 579 vehicles. The spring brake chamber may have been assembled with incorrect springs that were out of specification, which may cause the pressure plate to shift.

 

Remedy

Dealers will replace brake chambers, free of charge. Owner notification letters were mailed on July 9, 2021. Owners may contact PACCAR (Peterbilt) customer service at 1-940-591-4220. PACCAR’s number for this recall is 21PBE.

 

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

 


Description

Safety Recall -TSE Brake Chamber Air Leak- NHTSA ID: 21V328

 

What’s New

Safety Recall – TSE Brake Chamber Air Leak- NHTSA ID: 21 V328. Meritor brake chambers were built with a misaligned park spring, which may cause a fatigue hole in the diaphragm and an internal air leak. The affected brake chambers will be replaced.

 

Introduction

Meritor has decided that a defect which relates to motor vehicle safety exists in certain model 579 and 348 vehicles manufactured from 03/11/2020 through 07/13/2020 with Meritor rear disc brakes.

Certain TSE brake chambers were built with a misaligned park spring, which may cause a fatigue hole in the diaphragm and an internal air leak. The leak could drain the air system pressure, causing brake drag and setting the parking brakes, increasing the risk of a crash.

 

Resolution

Service all affected chassis that enter your dealership, even if the customer has no issue with the chassis.

1. Review the attached chassis list for your dealer code and schedule your customer(s) for service if their chassis is on the list.

2. If you are not using Service Management to start repair orders, review SIR for “Complete” or “In Process” next to the “21PBE” campaign code prior to performing this repair.

3. Follow the procedures below to replace the rear brake chambers.

 

Procedure

Please follow your dealership’s safety procedures and precautions to ensure the vehicle can be safely repaired and maintained.

 

WARNING!

Prior to the removal of any air system component, always block and hold the vehicle by a secure means other than the vehicle’s own brakes. Depleting air system pressure may cause the vehicle to roll. Keep hands away from chamber push rods and slack adjusters; they will apply as air system pressure drops in the spring brake chambers.

 

Removal

1. Block wheels.

2. Cage spring brakes.

3. Relieve air system pressure.

4. Identify and remove air lines.

5. Unbolt spring brake chamber from caliper and remove.

 

Installation

1. Bolt spring brake chamber to caliper and tighten to 100-150 Lb. ft. (136-204 N.m.)

2. Reinstall air lines.

3. Uncage spring brake.

4. Test brake function.

 



2 Affected Products

Vehicles

MAKE MODEL YEAR
PETERBILT 348 2021
PETERBILT 579 2021

 


8 Associated Documents

Recall 573 Report- Amendment 2

RCLRPT-21V328-6474.PDF 213.847KB

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Recall 573 Report- Amendment 1

RCLRPT-21V328-5739.PDF 213.834KB

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Recall Acknowledgement

RCAK-21V328-5840.pdf 696.477KB

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Defect Notice 573 Report

RCLRPT-21V328-1882.PDF 213.793KB

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ISSUED Owner Notification Letter(Part 577)

RCONL-21V328-9479.pdf 218.205KB

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Safety Bulletin

RCSB-21V328-5451.pdf 652.13KB

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Recall Quarterly Report #2, 2021-4

RCLQRT-21V328-2229.PDF 211.234KB

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Recall Quarterly Report #1, 2021-3

RCLQRT-21V328-7132.PDF 211.133KB

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Latest Recalls Documents

For the Latest and Most Recent Recalls Information Visit the link below…

https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=21V328&docType=RCL

 


 

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