SC0441 Steer Axle Fasteners Not Tightened Properly – 2023 Mack Granite

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Date Number Release Page 03.2023 SC0441 01 1(4)
Meritor Driven Steer Axle Fastener Inspection
GR
RECALL INFORMATION
(March 2023)
Mack Trucks has determined that certain 2023 model year GR vehicles build with a Meritor MX-810 driven steer axle could have under torqued fasteners on the axle assembly. On affected vehicles there is a potential risk that fastener securing the brake caliper to knuckle, steer arm to knuckle, lower king pin to knuckle, and tie rod to knuckle could fail resulting in a vehicle crash, property damage and/or personal injury.
Mack Trucks has not received any complaints or reports of vehicle crashes because of this safety issue; therefore, Mack considers this as a proactive measure to protect the public and Mack’s customers from the potential risk associated with this defect.
To ensure that these vehicles meet Mack’s stringent quality requirements, follow the instructions outlined below to check torques of certain fasteners and replace as necessary.
VEHICLES AFFECTED
Certain Mack GR Models manufactured between March16, 2022, and October 25, 2022.
VEHICLE QUANTITY
There are 17 vehicles affected by this recall. (17 US)
SAFETY
RECALL
Mack Trucks Inc.
Greensboro, NC USA
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Parts
Hardware as needed
Loctite 242 Adhesive (Loctite 243 or appropriate equivalent)
Tools
Steer Arm/Lwr King Pin Bolt
1-5/16” Socket
Caliper Bolts
17 mm Allen Bit
Tie Rod Castle Nut
1-9/32” Socket
Wheel Nut
33 mm/ 1-5/16
0-600 lb.-ft Torque Wrench
0-200 lb.-ft Torque Wrench (optional)
Repair Instructions
Important Note!
Record Truck VIN number, vehicle mileage, axle serial number, repair date, technician name, and any bolts that were replaced.
1. Secure vehicle for service.
2. Park the vehicle on a lever surface.
3. Place the gear lever in neural.
4. Install wheel chocks.
5. Lift & support the vehicle using jack stands.
6. Remove the tire and wheel assemblies on the steer axle.
7. Set torque wrench to 510 lb-ft (691 Nm) and apply clockwise tightening rotation to each steer
Mack Truck Inc.
Safety Recall Date 03.2023 Page 3 of 4
arm /king pin bolt. (See above)
8. If any of the bolts turn, remove the fastener and replace with new one. Torque to 510 lb-ft (691 Nm).
9. Apply colored paint pen stripe across each bolt head as they are torqued.
10. Set torque wrench to 350 lb-ft (475 Nm) and apply clockwise tightening rotation to each caliper hex fasteners.
11. If any of the hex fastener turn, remove and replace with a new fastener and torque to 400 lb-ft (542 Nm).
12. Apply colored paint pen stripe across each bolt head as they are torqued.
13. Remove the cotter pin from the cross-tube end castle nut.
14. Use a paint pen to mark the cotter pin hole alignment on the top of the ball stud head.
15. Set torque wrench to 120 lb-ft (163 Nm) and apply clockwise tightening rotation. If the nut turns re-set the torque wrench to 150 lb-ft (203 Nm) and check for cotter pin hole alignment with the castle nut.
16. Do not back the nut off, if necessary, continue to turn the nut in a clockwise tightening rotation until the castle nut and the cotter pin hole are aligned.
17. Install a new cotter pin and properly bend the ends locking the pin.
18. Reinstall the wheels and torque the nuts to specification.
19. Remove the jack stands and lower the truck.
20. Remove wheel chocks.
21. Release vehicle back to service.
Important Note!
If further assist is need for the repair, please visit the manufacturers service manual.
https://graphicvillage.org/meritor/MM16125.pdf
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REIMBURSEMENT
This repair is covered by an authorized Safety Recall. Reimbursement is obtained through the normal claim handling process.
UCHP Reimbursement Claim Type (used only when uploading from the Dealer Business System)
40
Recall Status
Vehicle repaired per instructions
1-Modified per instructions Labor Codes
1720-16-09-01 Campaign, General (X40)
4.0 Causal Part
24019943 Authorization Number
C6652
Note: Dealers are to perform Safety Recalls on all subject vehicles at no charge to the vehicle owner regardless of mileage, age of vehicle or ownership (original purchaser or subsequent purchasers). Whenever vehicles are subject to a Safety Recall are brought to your dealership for service, or taken into your dealership vehicle inventory, it is strongly recommended that every effort be made to perform the recall correction before the vehicle is sold or released to the owner.

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SC0441_OWNER_LTR
March 2023
This Notice applies to your vehicle, see enclosed “Notice of Vehicle Recall”
DEAR MACK TRUCK OWNER:
This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act.
Mack Trucks, Inc. has decided that a defect which relates to motor vehicle safety exists in certain 2023 Mack Granite vehicles manufactured March 16, 2022 through October 25, 2022. All of the vehicles at issue were delivered to the U.S. military by Mack Defense.
SAFETY DEFECT:
The front-drive steer axle fasteners may not have been tightened sufficiently and could come loose, resulting in a complete separation of the axle assembly joints.
SAFETY RISK:
Steer axle assembly separation can result in a loss of vehicle control, increasing the risk of a crash.
PRECAUTIONS YOU CAN TAKE:
TIME REQUIRED FOR THE REPAIR:
There are no precautions you can take other than having your vehicle repaired. Meritor they will be sending their technicians to complete these and Mack Defense will be the one ensuring completion.
The time required to inspect and/or repair your vehicle is approximately 2 hours.
WHAT YOU SHOULD DO:
Mack Defense will be contacting you directly to coordinate the repair. Meritor will be sending their technicians to complete these and Mack Defense will be the one ensuring completion. All repairs will be performed free of charge.
IMPORTANT SAFETY RECALL SC0441
NHTSA RECALL # 23V-143
NOTICE REGARDING LEASED VEHICLES:
If you are a Lessor of vehicles subject to this Notice, you have an obligation under Federal Law to provide a copy of this Notice to all Lessees within 10 days of your receipt of this Notice. Further, you must maintain a record, which identifies the Lessee(s) to whom you send a copy of this letter, the date you send this letter, and the Vehicle Identification Number(s) of the vehicle(s) that you have leased to that lessee. For purposes of this Notice, the term Lessor means: a person or entity that is the owner, as reflected on the vehicle’s title, of any five or more leased vehicles (as defined in CFR Section 577.4), as of the date of notification by the manufacturer of the existence of a safety-related defect or non-compliance with a Federal Motor Vehicle Safety Standard in one or more of the leased motor vehicles.
OWNER RECALL RESPONSE CARD:
The enclosed “Notice of Vehicle Recall” identifies your vehicle. If you no longer own the vehicle, please help us update our records by completing the “Vehicle Disposition Record” portion of the enclosed postage-free Notice of Mandatory Safety Campaign card and mailing it back to us.
ASSISTANCE/
COMPLAINTS:
PRE NOTIFICATION
REMEDIES:
If your vehicle has not been repaired within a reasonable time after delivering it to a Mack Parts and Service Center, please contact:
Mack Trucks, Inc.
North American Certification and Compliance
P.O. Box 26115
Greensboro, NC 27402-6115
vtna.regulatoryaffairs@volvo.com
You may also submit complaints to the Administrator of the National Highway Traffic Safety Administration (1200 New Jersey Avenue, S.E., Washington DC 20590 or call the toll-free Auto Safety Hot Line at 1-888-327-4236 (TTY: 1-800-424-9153), or go to http://www.safercar.gov if you believe that Mack has failed to remedy the defect without charge, or has failed to remedy the vehicle within 60 days of the owners first tender to obtain repair following the earliest time that parts are available.
If you have previously paid for repairs as a result of this issue, you may be entitled to recovery of those expenses.
Submit copies of all documentation supporting your claim according to the rules specified in the “General Plan for Reimbursement of Pre-notification Remedies” provided in this mailing.
We regret any inconvenience this may cause to your operation, but hope you will appreciate our sincere efforts to demonstrate Mack’s commitment to provide our customers with the best possible product.
MACK TRUCKS, INC.

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MACK TRUCKS
RECALL ALERT
© Mack Trucks, Inc. CONFIDENTIAL – For limited distribution only to circulation list above. This bulletin, and any information herein, is subject to change by Company without
notice. For the most current and accurate information, always refer to Trucks Dealer Portal for the electronic version of this document.
Description
On certain vehicles, there exists the potential of under torque on fasteners on the axle assembly, specifically: Brake caliper to knuckle, steer arm to knuckle, lower kingpin to knuckle, tie-rod to knuckle. The failure of one of these joints could lead to loss of control of the vehicle, which could result in a crash.
There have been no accidents or injuries or field complaints or warranty claims related to this issue.
Meritor they will be sending their technicians to complete these and Mack Defense will be the one ensuring completion.
Model and Model Years Affected
• Certain 2023 Mack GR vehicles manufactured March 16, 2022 through October 25, 2022. All of these vehicles are Mack Defense.
Vehicle Quantities
• 17 vehicles (all 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 March 8, 2023.
• Owner notification letters will be released on or before April 28, 2023.
• Repair Instruction will be released once they are available.
Contact
If you have questions or concerns about this recall, contact the Regulatory Affairs Department at vtna.regulatoryaffairs@volvo.com.
Subject:
Safety Recall SC0441, Meritor MX-810 Driven Steer Axle
Recall Number:
SRA-M441
Date:
March 8, 2023
Applicable Markets:
☒U.S. ☐Canada ☐ Export

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OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-143
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Mack Trucks, Inc. MAR 03, 2023 NHTSA Recall No. : 23V-143 Manufacturer Recall No. : SC0441
Manufacturer Information :
Manufacturer Name : Mack Trucks, Inc.
Address : 2100 Mack Boulevard
PO Box M Allentown PA 18105-5000 Company phone : 610-709-2131
Population :
Number of potentially involved : 17 Estimated percentage with defect : 100 %
Vehicle Information : Vehicle 1 : 2023-2023 Mack Granite
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The recall population was determined by trucks which were equipped with axles identified by Meritor as a result of their investigation, which had gone through a rework process.
Production Dates : MAR 16, 2022 – OCT 25, 2022 VIN Range 1 : Begin : 1M2GR45C2PM001163 End : 1M2GR45C0PM001193 ✔ Not sequential Description of Defect :
Description of the Defect : Potential of under torque on fasteners on the axle assembly, specifically: Brake caliper to knuckle, steer arm to knuckle, lower kingpin to knuckle, tie-rod to knuckle.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : The failure of one of these joints could lead to loss of control of the vehicle,
which could result in a crash.
Description of the Cause : Rework process at Meritor axle assembly operations.
Identification of Any Warning
that can Occur :
Handling issues may precede a joint failure.
Involved Components : Part 573 Safety Recall Report 23V-143 Page 2 Component Name 1 : Front Drive Steer
Component Description : Commercial Truck Front-Drive Steer Axle Component Part Number : 24019943 Supplier Identification : Component Manufacturer
Name : Meritor
Address : 2135 W Maple Rd
Troy Michigan 48084 Country : United States Chronology :
December 6, 2022 it was identified during operation at Mack Trucks, a unit, where the caliper bolts had backed off. Meritor’s investigation identified a suspect population of 26 axles, which were manufactured between January and November 2022. Meritor inspected 9 units for breakaway torque during January 9th and 10th 2023. February 23 2023 Product Safety Working Group was notified of the findings.
February 27 2023 Product Safety Working Group makes the recommendation to the Product Safety Committee that a product safety defect exists. February 27 2023 Product Safety Committee determines that a safety defect exists. There have been no accidents or injuries or field complaints or warranty claims related to this issue. Description of Remedy :
Description of Remedy Program : Fasteners will be torqued to proper value; specifically inspect and tighten
caliper socket head cap screws, replace king pin cap and steer arm fasteners, inspect tie rod and connecting points for damage, tighten castle nut as needed and replace cotter pin.
Reimbursement for the recall will be covered by Manufacturer’s Reimbursement Plan on file with NHTSA. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-143
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The information contained in this report was submitted pursuant to 49 CFR §573
How Remedy Component Differs from Recalled Component :
Identify How/When Recall Condition was Corrected in Production :
Components and assemblies in question will be torqued to proper values and hardware which needs replacement will be replaced.
Rework process corrected, work instructions updated, and operators trained. Implemented torque traceability system. January 31, 2023
Recall Schedule :
Description of Recall Schedule : NR
Planned Dealer Notification Date : MAR 07, 2023 – MAR 07, 2023
Planned Owner Notification Date : APR 28, 2023 – APR 28, 2023
* NR – Not Reported

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