Alternator Belt May Overheat Seized Bearing – 2020 Volvo 9700

April 6, 2022 NHTSA CAMPAIGN NUMBER: 22V222000

Alternator Belt May Overheat Seized Bearing

An overheated alternator bearing can increase the risk of a fire.

 

NHTSA Campaign Number: 22V222000

Manufacturer Volvo Bus Corporation

Components ENGINE AND ENGINE COOLING, ELECTRICAL SYSTEM

Potential Number of Units Affected 47

 

Summary

Volvo Bus Corporation (Volvo Bus) is recalling certain 2020 Volvo 9700 DOT vehicles. In the event of the alternator front bearing seizing, the alternator belt may continue to operate, causing the bearing to overheat.

 

Remedy

Volvo Bus will replace the alternator belt, free of charge. Owner notification letters September 30, 2022. Owners may contact Volvo Bus customer service at 1-866-870-2046.

 

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.nhtsa.gov.

 


SR22-83A

10-21 -2022

9700 AL TERNA TOR BELT REPLACEMENT

DESCRIPTION

On vehicles affected by this recall, the heavy duty alternator belt (with aramid cord reinforcement) may continue to turn the alternator pulley after an alternator bearing failure. If the pulley continues to turn, it could lead to front bearing overheat.

Therefore, the heavy duty aramid belt must be replaced by a polyester belt as needed following the interchange table provided.

Before reinstalling the polyester belt, the alternators front bearing must be inspected for damage and the alternator(s) replaced as needed.

Please take note that only the vehicles equipped with a Remy 55S 250 amp alternators are affected by this bulletin.

RCSB-22V222-0027

 


Chronology :

-2022-03-15 Prevost initiate an internal inquiry to analyse root cause of thermal event related to alternator front bearing. A link between the introduction of new belts and an increase of thermal events related to alternator’ front bearing failure was identified. This new case would be presented to Volvo Product Safety Committee (PSC)

-2022-03-30 Case presented to PSC. PSC decided there is a safety related defect and a recall is required. As some Volvo 9700 vehicles use the same type of belt, it was decided to include this vehicles on the recall

-2022-03-31 Preliminary discussion with NHTSA to expose the findings

-2022-04-06 Prevost submitted the vehicle defect report to NHTSA

 


1 Affected Product

Vehicle

MAKE MODEL YEAR
VOLVO BUS 9700 2020

 


11 Associated Documents

Recall Acknowledgement

RCAK-22V222-6536.pdf 645.407KB

RCAK-22V222-6536

 


Defect Notice 573 Report

RCLRPT-22V222-6814.PDF 213.821KB

RCLRPT-22V222-6814

 


Recall 573 Report-Amendment 1-04/12/2022

RCLRPT-22V222-9414.PDF 213.982KB

RCLRPT-22V222-9414

 


Recall 573 Report-Amendment 2 – 05/26/2022

RCLRPT-22V222-6753.PDF 213.983KB

RCLRPT-22V222-6753

 


ISSUED Interim Owner Notification Letter(Part 577)

RIONL-22V222-1177.pdf 192.9KB

RIONL-22V222-1177

 


Safety Bulletin

RCSB-22V222-4072.pdf 578.97KB

RCSB-22V222-4072

 


ISSUED Owner Notification Letter(Part 577)

RCONL-22V222-4625.pdf 220.197KB

RCONL-22V222-4625

 


Safety Bulletin

RCSB-22V222-0027.pdf 1009.206KB

RCSB-22V222-0027

 


Recall Quarterly Report #1, 2022-3

RCLQRT-22V222-5709.PDF 211.123KB

RCLQRT-22V222-5709

 


ISSUED Owner Notification Letter(Part 577)

RCONL-22V222-9560.pdf 265.1KB

RCONL-22V222-9560

 


Recall Quarterly Report #2, 2022-4

RCLQRT-22V222-4681.PDF 211.236KB

RCLQRT-22V222-4681

 


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=22V222&docType=RCL

 


1 Associated Investigation

Alternator Front Bearing Failure
NHTSA ID: PE21011
Dated opened: May 13, 2021

NHTSA’s Office of Defects Investigation (ODI) is opening a Preliminary Evaluation after receiving a tip from a fleet safety manager concerning alternator front bearing failures that cause elevated temperatures within the engine compartment, resulting in the fire suppression system (FSS) activating, immediately shutting the engine down, and rendering the bus inoperable.

Review of Early Warning Reporting Data identified 9 field reports for Model Year (MY)2015 through MY2019 H3 and X3 Prevost buses, describing alternator failures in any of 3 alternators equipped on the bus. In some cases, a minor fire occurred damaging nearby electrical harnesses.

An immediate shut down of the bus can increase the risk of a crash or injury of passengers when transferring to another bus.

ODI is opening this investigation to evaluate the cause, consequence, scope and frequency of the alleged defect in the subject Prevost buses.


 

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Last update on 2023-11-21 / Affiliate links / Images from Amazon Product Advertising API

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