SC0458 – Insufficient Air Volume in Brake System – 2022-2024 Mack Granite

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February 19, 2024 NHTSA CAMPAIGN NUMBER: 24V122000

Insufficient Air Volume in Brake System

Insufficient air volume can reduce braking performance and increase the risk of a crash.

 

NHTSA Campaign Number: 24V122

Manufacturer Mack Trucks, Inc.

Components SERVICE BRAKES, AIR

Potential Number of Units Affected 10

 

Summary

Mack Trucks, Inc. (Mack) is recalling certain 2022-2024 Granite vehicles. The air tanks have an insufficient volume of air for the brake system. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, “Air Brake Systems.”

 

Remedy

Dealers will add additional air tank volume, free of charge. Owner notification letters were mailed March 14, 2024. Owners may contact Mack customer service at 1-800-866-1177. Mack’s number for this recall is SC0458.

 

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.

 


Description

On certain vehicles, the air volume calculation for system air is 3% below the FMVSS 121 required “12 times the combined volume of all service brake chambers”. The risk is a vehicle crash that may result in personal injury.

Vehicles will be recalled and additional air tank volume will be added to meet FMVSS 121 requirements..

 

Model and Model Years Affected

  • Certain 2022-2024 Mack Granite vehicles manufactured August 18, 2021 through September 18, 2023.

 

Vehicle Quantities

  • 10 vehicles (10 US)

 

Dealer Responsibilities

  • The National Traffic and Motor Vehicle Safety Act and Canadian Motor Vehicle Safety Act require dealers to ensure that all new and used vehicles are free of safety defects and comply with all relevant safety standards at the time of delivery to the consumer.
  • Dealers should make their personnel aware of the safety recall. In the event that a dealer has a vehicle included in the safety recall in their inventory to be sold, the condition must be corrected before releasing it to a customer.

 

Notification Release Schedule

  • Vehicle list will be posted on the Trucks Dealer Portal February 21, 2024.
  • Owner notification letters will be released on or before April 15, 2024.

 

Contact

If you have questions or concerns about this recall, contact the Regulatory Affairs Department at vtna.regulatoryaffairs@volvo.com.

 


Date
03.2024

Number
SC0458

Mack Air Tank Volume
GR

 

RECALL INFORMATION

(March 2024)

Mack Trucks has determined that on certain 2022 to 2024 model year Granite trucks, the air volume calculation for system air is 3% below the FMVSS 121 required “12 times the combined volume of all service brake chambers”. The risk is a vehicle crash that may result in personal injury.

Mack Trucks has not received warranty claims, field reports, or service reports because of this issue.

To ensure that these vehicles meet Mack’s stringent quality requirements, follow the instructions outlined below to add an additional air tank to increase overall volume and meet FMVSS 121 requirements.

 

VEHICLES AFFECTED

Certain Mack Granite vehicles manufactured between August 18, 2021, and September 18, 2023.

 

VEHICLE QUANTITY

There are 10 vehicles affected by this recall. (10 US)

 

Parts

Part Number Part Description Quantity
23675317 Air Tank 1
23038158 Drain Valve 1
21292190 Straps 2
60111757 M14 Screw 4
21292188 Bracket 2
990953 M14 Locknut 4
990949 M6 Locknut 4
991084 Swivel M22 1
991965 Elbow Fitting 3/8” 1
991061 Plug 1
992013 F-fitting As Needed
60110453 Push to connect 3/8” As Needed
60110388 Push to connect 1/2” As Needed

 

Repair Instructions

1. Park the vehicle on level surface.

2. Apply the parking brake.

3. The retrofit air tank will be installed on the right-hand side of the truck on the frame.

4. Begin by drilling four 15.5mm holes in the frame to mount the air tank brackets. Use the measurements below.

 

5. Disconnect the cable from the negative terminal.

 

6. The retrofit air tank will be installed on the right-hand side of the truck on the frame.

 

7. Begin by drilling four 15.5mm holes in the frame to mount the air tank brackets. Use the measurements below.

 

8. Ensure the plug, swivel, and elbow fitting have been installed on the tank prior to mounting it to the frame.

 

9. Once drilled, install the brackets, air tank, and straps to the frame using appropriate hardware.

 

10. Once installed, connect the airline from the lower tank to underframe tank on right-hand side.

 

11. Route the 3/8” airline from rack lower air tank to under frame tank. Airline can be clipped on airline bundle on the transmission crossmember.

 

12. Once installation is completed, check system for any leaks.

 

13. Reconnect cable to negative terminal.

 

14. Remove wheel chocks.

 

15. Return vehicle to service.

 

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Chronology :

February 7, 2024 Product Safety is informed of a potential issue with air volume calculations in certain vehicles and an investigation is opened.

February 14, 2024 Results of the investigation are presented to the Product Safety Committee which determines that a product noncompliance to FMVSS 121 exists.

February 19, 2024 DIR Filed with NHTSA.

There have been no accidents or injuries related to this issue, there have been no warranty claims, field reports or customer complaints associated with this issue.

 


3 Affected Products

Vehicle

MAKE MODEL YEAR
MACK GRANITE (GR) 2022-2024

 


5 Associated Documents

Noncompliance Notice 573 Report

RCLRPT-24V122-2686.PDF 215.165KB

 


Recall Acknowledgement

RCAK-24V122-6564.pdf 645.295KB

 


Manufacturer Notices(to Dealers,etc)

RCMN-24V122-1694.pdf 165.271KB

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Remedy Instructions and TSB

RCRIT-24V122-5863.pdf 1024.457KB

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ISSUED Owner Notification Letter(Part 577)

RCONL-24V122-8328.pdf 134.706KB

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Latest Recalls Documents

For the Latest and Most recent Recall Information Visit the link below…

https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=24V122&docType=RCL

 


 

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Last update on 2024-04-11 / Affiliate links / Images from Amazon Product Advertising API

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