Spring Brake Chamber Assembled Incorrectly

Affected vehicles (1)

Component / system

Defect

Meritor, Inc. (Meritor) is recalling certain TSE T2024 Air Chamber Part Number D3 3376T20. The spring brake chamber may have been assembled with incorrect springs that were out of specification, which can cause the pressure plate to shift.

Risk / consequence

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

Remedy

Meritor will notify the affected vehicle OEMs and will inspect the pressure plate and replace brake chambers where the pressure plate has shifted, free of charge. Owner letters were mailed May 10, 2021. Owners may contact Meritor customer service at 1-866-668-7221.

Chronology of events

1. Jan 6, 2021

   1/6/21 Meritor was notified of field issue related to spring air leaks at the diaphragm.

2. Jan 11, 2021

   1/11/21 Meritor begins investigation of issue with supplier

3. Jan 19, 2021

   1/19/21 Meritor meets with supplier quality and customer to discuss problem solving and root cause

4. Jan 19, 2021

   1/19/21 Meritor engineering develops testing plan to collect data for further analysis.

5. Feb 26, 2021

   2/26/21 Meritor reviews brake tests with customer, verifying air warning system activated. 3/1 - 3/15/21 Meritor compliance reviews brake testing data

6. Mar 8, 2021

   3/8/21 Meritor and customer review warranty data and failures 3/15-3/22/21 Customer performs additional field inspections for suspect lot. Additional units identified.

7. Mar 31, 2021

   3/31/21 Meritor compliance reviews further developments regarding TSE issue

8. Apr 2, 2021

   4/2/21 Meritor determines issue to be safety related

Notification schedule

Dealer notification

APR 12, 2021 - APR 30, 2021

Owner notification

NR - NR

Documents