Recall SC0426 – Watson & Chalin Pivot Bolt Replacement – 2020-2021 Mack Granite

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Date Number Release Page 06.2021 SC0426 01 1(6)
Watson & Chalin Pivot Bolt Replacement
GR
RECALL INFORMATION
(June, 2021)
Watson & Chalin Manufacturing, Inc. (“W&C”) has decided that a defect which relates to motor vehicle safety exists in a limited number of SL2065 20,000-pound rated capacity steerable auxiliary lift axle suspension systems. These SL2065 suspension systems were manufactured between November 13, 2019 and April 30, 2020.
These suspensions may be equipped with lower rear pivot cap screws that are not long enough to sufficiently engage the locking feature of the corresponding nuts.
Mack Trucks has not received any complaints or reports of vehicle crashes because of this non-compliance.
To ensure that these vehicles meet Mack’s stringent quality requirements. Replacement of the lower rear pivot fasteners is required. These parts will need to be obtained directly from Watson & Chalin.
VEHICLES AFFECTED
Certain Mack North America vehicles manufactured between June 05, 2019 and March 9, 2020.
VEHICLE QUANTITY
There are 8 vehicles affected by this recall (8 U.S.).
Safety Recall
Mack Trucks Inc.
Greensboro, NC USA
Page 2 of 5
Parts Information
Parts need to be ordered direct from Watson & Chalin by calling 972-838-1623 or emailing wcwarranty@watsonsuspensions.com . When contacting Watson & Chalin for parts the following information will be needed:
VIN
Lift Axle Model Number
Lift Axle Serial Number
Build Date
In Service Date
Current Mileage
Ship to Address
Contact Name
Repair Instructions
1. Verify all required parts were received in the service repair kit.
2. Verify all required parts are free from damage that would impair function.
3. Verify that the threads of the fasteners are clean and dry.
4. Lay out all required replacement parts such that they can be easily located during reassembly.
5. Verify all required tools are available.
6. Verify all required tools are free from damage that would impair function.
7. Lay out all required tools such that they can be easily located.
8. Park the vehicle on a flat, level surface.
9. Engage the parking brake so that the vehicle may not roll.
10. Chock the vehicle’s wheels so that the vehicle may not roll.
11. Verify the vehicle will be properly restrained from movement and safe to work on.
12. Lower the auxiliary lift axle so that the tires are in contact with the ground.
13. Depressurize the auxiliary lift axle air system. De-pressurize the entire vehicle air system if required.
14. Verify system air pressure cannot be restored inadvertently while working on the vehicle.
15. Follow any additional vehicle manufacturer and/or dealership safety procedures and precautions to ensure the vehicle can be safely repaired and maintained.
16. Support the auxiliary lift axle with adjustable supports such as jacks, stands, or straps so that it does not roll or move when the control arm fasteners are removed.
Part Number
Part Names
Quantity
SRK2065WAR-001
Lower Rear Pivot Fastener Repair Kit
1
Mack Truck Inc.
Safety Recall Date 06.2021 Page 3 of 5
17. From this point forward, work on only one side of the vehicle at a time.
18. Remove the axle-side fasteners:
a. Make note of the lower control arm spacer washer locations. These are the large diameter washers
inside of the axle flanges. If required, mark the locations or take photographs to reference during
re-installation. NOTE THAT WASHER LOCATIONS MAY DIFFER FROM THE ABOVE PICTURE. Spacer
washers may be left in and reused if they are free from damage.
b. Use 1-5/16-inch wrenches and/or sockets to remove the nuts.
c. If required, use a grinder and cutoff wheel to remove stuck fasteners. Take care not to damage the axle flange, axle tube, or any other vehicle components when using the grinder.
d. Secure the control arm with a jack stand, so it does not fall, and knock out the cap screw using punches and a hammer. USE CAUTION, AS CONTROL ARM MAY SHIFT WHEN THE FASTENER IS REMOVED.
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19. Install the replacement fasteners:
a. If required, place a floor jack or other lifting device under the lower control arm, then raise it into
the axle.
b. Install the lower control arm spacer washers. An alignment or center punch inserted from the
outboard side may be used to hold them in place until the cap screw is inserted. For correct washer
locations, reference notes taken in Step 18a.
c. Install the lower control arm pivot cap screw, washers, and nut, but do not tighten.
d. Use 1-5/16-inch wrenches and / or sockets to snug the lower pivot fastener. Confirm fastener is fully engaged with the joint.
e. Secure the heads of the cap screws with a combination wrench and tighten the nuts to 400 lb-ft torque. DO NOT TORQUE FROM HEAD OF CAP SCREW.
20. Repeat steps 18 and 19 for the opposite side of the vehicle.
21. Re-pressurize the vehicle’s air system.
22. Cycle the auxiliary suspension.
23. Return vehicle to lot.
NOTE: If any of the existing lower rear pivot cap screws currently equipped on suspensions
are loose or damaged, the vehicle should not be further operated until the replacement cap
screws are installed.
Mack Truck Inc.
Safety Recall Date 06.2021 Page 5 of 5
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
Primary Labor Code:
1720-16-09-01 General Campaign. 0.1 x 8
0.8
Causal Part
FAA088120000A00
Authorization Number
C6628
Note: Dealers are to perform Safety Recall Campaign 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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SC0426_OWNER_LTR_US Page 1 of 2
July 2021
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 Mack 2020/2021 GR model vehicles manufactured from November 3, 2019 through April 30, 2020 built with Watson & Chalin SL2065 20,000-pound rated capacity steerable auxiliary lift axle suspension systems.. .
SAFETY DEFECT:
These suspensions may be equipped with lower rear pivot cap screws that are not long enough to sufficiently engage the locking feature of the corresponding nuts
SAFETY RISK:
In some cases, this condition may cause a loss of clamp load of the corresponding pivot joint. Extended use of the suspension in this condition can result in the fracture or loss of the cap screw and related washers and nut. This can further result in foreign object debris on the roadway, increasing the risk of a crash and / or injury.
PRECAUTIONS YOU CAN TAKE:
TIME REQUIRED FOR THE REPAIR:
W&C recommends owners of any vehicles in this recall to inspect the lift axle suspension system using the criteria on page 2 of the attached bulletin. The inspection is to determine, once the fastener is properly tightened to the specified torque, whether the lower rear pivot cap screws meet minimum specified length requirements by measuring from the end of the cap screw to the top of the nut.
The time required to repair your vehicle is approximately 0.8 hours.
WHAT YOU SHOULD DO:
You should contact the nearest Mack Parts and Service Center and make an appointment. The lift axle will be inspected and repaired if needed at no charge to you.
You can locate the closest Mack Parts and Service Center by going on line to https://www.macktrucks.com/ and selecting “Dealer & Service Locations” or by calling our toll-free number: 1-800-866-1177.
IMPORTANT SAFETY RECALL SC0426
NHTSA RECALL # 21V-476
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.
IF YOU NO LONGER OWN VEHICLE:
The enclosed “Notice of Vehicle Recall” identifies your vehicle. If you no longer own the vehicle, please help us update our records by contacting our warranty help desk at Help.warranty@volvo.com.
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.
Regulatory Affairs Department,
P.O. Box 26115
Greensboro, NC 27402-6115
vtna.regulatoryaffairs@volvo.com
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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