23505 Driveshaft Separation – 2023 International HV & 2023-2024 International MV

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~©~OO□@~ ~RWCEPROCEDURE
APR 2 5 2023
Compliance Dept
23505
APRIL, 2023
SUBJECT: SAFETY RECALL Rear Axle Spring Wedge Shim
on certain 2023 International® HV™ Series trucks
built 04/29/2022 thru 12/07/2022 and 2023 and
2024 International® MV™ Series trucks built
02/24/2022 thru 01/18/2023 with feature code
14VAD, 14VAG, or 14VAH (Suspension, rear,
single with vari-rate springs)
CUSTOMER LETTER
Print ready (PDF file) copy of the Customer Letter
DEFECT DESCRIPTION
The rear axle spring wedge shim may have been installed in the incorrect
orientation ( 180-degrees ). An incorrectly oriented axle spring wedge shim can
result in driveline angles out of specification and can cause premature wear and
eventual failure of a U-joint, which could result in drive shaft separation from the
vehicle. U-joint failure resulting in drive shaft separation from the vehicle can
increase the risk of a vehicle crash that may result in property damage, personal
injury, or death.
MODELS INVOLVED
This safety recall involves certain 2023 International® HV™ series trucks built
04/29/2022 thru 12/07/2022 and 2023 and 2024 International® MV … series trucks
built 02/24/2022 thru 01/18/2023 with feature code 14VAD, 14VAG, or 14VAH
(Suspension, rear, single with vari-rate springs).
ELIGIBILITY
This procedure applies ONLY to vehicles marked in the International® Service
Portal5M with Safety Recall 23505. Also complete any other open campaigns
listed on the Service Portal at this time.
VEHICLE RECALL 23505
© 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 1
PARTS INFORMATION
Part Number Part Description Quantity
144425H Locknut, 7/8-NF CAD PIT 8
25549R1 Flat Washer 8
SERVICE PROCEDURE
WARNING\ To prevent personal mJury and / or death, or damage to
property, park vehicle on hard flat surface, turn the engine off, set the
parking brake and install wheel chocks to prevent the vehicle from moving
in either direction.
WARNING! To prevent personal injury and / or death, or damage to
property, if the vehicle must be raised, do not work under the vehicle
supported only by jacks. Jacks can slip or fall over.
WARNING! To prevent personal injury and/ or death, always wear safe eye
protection when performing vehicle maintenance.
WARNING! To prevent personal injury and / or death, or damage to
property, keep flames or sparks away from vehicle and do not smoke while
servicing the vehicle’s batteries. Batteries expel explosive gases.
1. Park vehicle on flat surface.
2. Shift transmission to Park or Neutral and set parking brake.
3. Turn vehicle ignition to Key OFF position.
4. Install wheel chocks at front of vehicle.
5. Using a jack, raise the rear of the vehicle and support the frame on jack
stands, high enough for the drive axle tires to clear the pavement.
6. Position the jack under the drive axle and raise the axle high enough to
relieve some of the leaf spring tension.
VEHICLE RECALL 23505
© 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 2
1 2 3 4 5
6 00004n◄se
Figure 1. Spring Wedge Shim Orientation
1. Incorrect spring wedge orientation (thin portion facing front)
2. U-joint bolt (2)
3. U-bolt nut/ washer (4, 2 shown)
4. Lower axle seat
5. Gap between leaf spring and axle
6. Spring shim / wedge shim
7. Starting on driver-side of vehicle, remove four U-bolt nuts and washers
(Figure 1, Item 3), and lower axle seat (Figure 1, Item 4). Discard nuts and
washers only.
8. Lower jack to create a gap between leaf spring and axle (Figure 1, Item 5), to
allow removal of spring wedge shim (Figure 1, Item 6).
9. Remove spring wedge shim. If necessary, remove one U-bolt to allow
removal of spring wedge shtm.
VEHICLE RECALL 23505
© 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 3
4 3
G0004714&7
Figure 2. Correct Wedge Shim Orientation
1. Correct orientation of spring wedge (thick portion towards front of vehicle)
2. Leaf spring
3. Axle
4. U-bolt (2)
10. Rotate spring wedge shim 180-degrees to orient thick portion of spring
wedge shim towards front of vehicle (Figure 2, Item 1 ).
11. Reinstall spring wedge shim (Figure 2, Item 1) and if removed in Step 8,
reinstall U-bolt (Figure 2, Item 4 ).
NOTE: When performing Step 12, ensure that spring wedge shim and any
spacer shims are properly seated with axle.
12. Using jack, raise axle (Figure 2, Item 3) into position with leaf spring (Figure
2, Item 2) and slightly compress spring.
13. Install lower axle seat.
14. Install four new U-bolt washers and nuts.
15. Repeat Step 7 through Step 14 to correctly orient passenger-side of spring
wedge shim.
VEHICLE RECALL 23505
@2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 4
NOTE: U-bolt nuts require multiple stages of tightening to ensure proper
installation.
NOTE: The torque values are the same for both models for the axles and
suspension they are using.
00004004IIO
Figure 3. U-Bolt Torque Sequence
16. Using a torque wrench, tighten U-bolt nuts using torque sequence depicted
in Figure 3.
a. Tighten nuts to 25 lb-ft (20.3 N·m) using diagonal pattern.
b. Tighten nuts to 75 lb-ft (102 N·m) using diagonal pattern.
c. Tighten Nuts to 150 lb-ft (203 N·m) using diagonal pattern.
d. Tighten nuts to 225 lb-ft (305 N·m) using diagonal pattern.
e. Tighten nuts to 290 lb-ft (407 N·m) using diagonal pattern.
17. Repeat Step 16 for opposite side.
18. Using a jack, raise rear of vehicle, remove jack stands, and lower vehicle.
19. Remove wheel chocks.
END OF SERVICE PROCEDURE
VEHICLE RECALL 23505
© 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 5
LABOR INFORMATION
Operation Number Description
A40-23505-1
CAMPAIGN IDENTIFICATION LABEL
Each vehicle corrected in accordance with this
campaign must be marked with a CTS-1075
Campaign Identification Label.
Complete the label and attach on a clean surface next
to the vehicle identification number (VIN) plate.
ADMINISTRATIVE / DEALER RESPONSIBILITIES
WARRANTY CLAIMS
Time
2.2 hrs
COMPLETEO
service Location Code ‘
Warranty claim expense is to be charged to Warranty. Claims are to be
submitted in the normal manner, making reference to Safety Recall 23505.
Section 7 of the Warranty Policy and Procedures Manual contains further
information related to the submission and processing of AFC/ Recall claims.
As with all claim submissions, items acquired locally must be submitted in the
“Other Charges” tab. The cost of any bulk items (such as a bag of cable tie
straps, roll of wire, barrel of oil, or tube of silicone) should be prorated for the cost
of the individual pieces / amount used during each repair.
VEHICLE RECALL 23505
e 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 6
GROUP – Enter n
NOUN – Leave b
umber
tank :
+-
GROUP
I I I
–
C (CAUSE) – Ente r either 1, 2, 3. (See below)
1. Inspected (No repair required).
2. Inspected and repaired.
3. Defective part from parts stock. –
WARRANTY-Cl’/a rranty Code) Enter 40. _
TYPE PART – En
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ter P for type part causing faflure. –
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UNITED STATES AND POSSESSIONS
NOUN C WARR. TP PAD
I I I I
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The National Traffic and Motor Vehicle Safety Act, as amended, provides that
each vehicle that is subject to a vehicle recall campaign must be adequately
repaired within a reasonable time after the owner has tendered it for repair. A
failure to adequately repair within 60 days after a tender of a vehicle is prima
facie evidence of failure to repair within a reasonable time. If the condition is not
adequately repaired within 60 days, the owner may be entitled to replacement
with an identical or reasonable equivalent vehicle at no charge, or to a refund of
the purchase price less a reasonable allowance for depreciation.
Dealers must correct all vehicles subject to this campaign at no charge to the
owner, regardless of mileage, age of vehicle, or ownership, from this time
forward.
Dealers should proceed immediately to make necessary correction to units in
inventory. All inventory vehicles subject to this recall campaign must be
corrected prior to sale, transfer or delivery. If vehicles have been sold or
transferred and you are in receipt of Customer Notification Letters and
Authorization for Recall Service cards for those vehicles, the transfer location or
customer must be notified immediately from your dealer location.
Dealers must make every effort to promptly schedule an appointment with each
owner to repair his or her vehicle as soon as possible. However, consistent with
the customer notification, dealers are expected to complete the repairs on the
mutually agreed upon service date.
VEHICLE RECALL 23505
© 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 7
Dealers involved in the recall process will be furnished a listing of owner names
and addresses to enable them to follow up with owners and have the vehicles
corrected. Use of this listing must be limited to this campaign because the list
may contain information obtained from state motor vehicle registration records,
and the use of such motor vehicle registration data for purposes other than this
campaign is a violation of law in several states.
CANADA
Dealers must correct all vehicles subject to this campaign at no charge to the
owner, regardless of mileage, age of vehicle, or ownership, from this time
forward.
Dealers should proceed immediately to make necessary correction to units in
inventory. All inventory vehicles subject to this recall campaign must be
corrected prior to sale, transfer or delivery. If vehicles have been sold or
transferred and you are in receipt of Customer Notification Letters and
Authorization for Recall Service cards for those vehicles, the transfer location or
customer must be notified immediately from your dealer location.
Dealers must make every effort to promptly schedule an appointment with each
owner to repair his or her vehicle as soon as possible. However, consistent with
the customer notification, dealers are expected to complete the repairs on the
mutually agreed upon service date.
Dealers involved in the recall process wiH be furnished a listing of owner names
and addresses to enable them to follow up with owners and have the vehicles
corrected. Use of this listing must be limited to this campaign because the list
may contain information obtained from state motor vehicle registration records,
and the use of such motor vehicle registration data for purposes other than this
campaign is a violation of law in several states.
EXPORT
Export Distributors should proceed immediately to make necessary correction to
units in inventory. All inventory vehicles subject to this recall campaign must be
corrected prior to sale, transfer or delivery. If vehicles have been sold or
transferred and you are in receipt of Customer Notification Letters and
Authorization for Recall Service cards for those vehicles, the transfer location or
customer must be notified immediately from your distributor location.
Export Distributors are to submit warranty claims in the usual manner making
reference to this recall number.
VEHICLE RECALL 23505
© 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 8
Export Distributors are expected to provide full cooperation and follow-up with
respect to this important subject matter. If you have any questions or need
further assistance, please contact the Regional Service Manager at your regional
office.
NAVISTAR, INC.
VEHICLE RECALL 23505
,@ 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 9

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Navistar, Inc.
2701 Navistar Drive
Ltsre, IL 60532 USA
navistar.com
IMPORTANT SAFETY RECALL 23505
NHTSA RECALL NO. 23V-153
This notice applies to your vehicle identified on the
enclosed card.
Dear INTERNATIONAL fl Customer,
This notice is sent to you ln accordance with the
requirements of the National Traffic and Motor Vehicle
Safety Act.
Navistar has decided that a defect which retates to motor
vehicle safety exists in certarn 2023 HV® sertes trucks built
04/29/2022 thru 12/07/2022 and 2023 and 2024 MV®
series trucks built 02/24/2022 thru 01/18/2023 with feature
code 14VAD, 14VAG, or 14VAH (Suspension, rear, single
with vari-rate springs).
REASON FOR THIS RECALL
The rear axfe spring wedge shim may have been instaned
incorrectly oriented (180-degrees). An incorrectly oriented
axle spring wedge shim can result in driveline angles out of
specification and can cause premature wear and eventual
failure of a U-joint, which could result in drive shaft
separation from the vehicle.
RISK TO MOTOR VEHICLE SAFETY
U-joint failure resulting in drive shaft separation from the
vehicle can increase the risk of a vehicle crash that may
result in property damage, personal injury, or death.
DEFECT REMEDY
The repair will involve correctly orienting the rear axle
wedge shim on both the left and right side of the rear axle
spring suspension. Authorized repair locations have parts
and instructions to repair your vehicle. The repair will be
performed free of charge and take approximately 2 hours
and 30 minutes to complete.
ACTIONS YOU SHOULD TAKE
If you own this vehicle, please schedule an appointment
with any Authorized repair center to have your vehicle
repaired. You can find your nearest dealer by using the
dealer locator at
https;//www .intemationaltrucks.com/dealer-locator or by
lRal&O[b{]g[ID
APR 2 8 2023
By: !:q_,~t.’_1:.”1,;-:_:_4 –
A NAVISTAR COMPANY
MAY 2023
calling 1-800-448-7825 or find the nearest Love’s center at
https://www.loves.com .
*Love’s and Speedco locations in Texas cannot perform
warranty services.
If you have already paid for repairs prior to this notice
that corrected the defect, you may be eligible for
reimbursement of certain repair expenses if they occurred
03/08/2022 thru 05/14/2023. Present your original repair
paperwork and proof of payment to any
INTERNATIONAL® dealer and your eligibility will be
reviewed. You may also submit a claim using the enclosed
Request for Reimbursement card.
If you are the lessor of this vehicle, please forward a
copy of this notrce to the lessee within ten days to comply
with federal regulations.
If you do not own this vehicle, please fill out and return
mail the enclosed card so that you will not be contacted
again about this recall.
IF YOU NEED FURTHER ASSISTANCE
If you believe that Navistar has failed to remedy the defect
without charge or within a reasonable time, please follow
the procedure described in the Owner Assistance Guide
section in your Owner’s Manual or call toll free 1-800-448-
7825.
You may also submit a complaint to the Administrator,
National Highway Traffic Safety Administration, 1200 New
Jersey Ave, SE, Washington, DC 20590; or call the toll
free Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800-
424-9153); or go to http://www.safercar.gov.
Navistar requests your prompt attention and patience
regarding the correction of this defect and apologizes for
any inconvenience this may cause you.
Navistar, Inc.

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OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-153
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Navistar, Inc. MAR 08, 2023 NHTSA Recall No. : 23V-153 Manufacturer Recall No. : 23505 Manufacturer Information :
Manufacturer Name : Navistar, Inc.
Address : 2701 Navistar Drive
Lisle IL 60532 Company phone : 331-332-1590
Population :
Number of potentially involved : 660 Estimated percentage with defect : 100 %
Vehicle Information : Vehicle 1 : 2023-2023 International HV
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : • The suspect population is identified by models equipped with feature code 14VAD, 14VAG, or 14VAH (Suspension, rear, single with vary-rate springs).
• The Inclusive dates of manufacture were determined by when the San Antonio manufacturing plant began production of the HV® and MV® series trucks through the date the issue was contained in production.
• The vehicles in the suspect population were assembled at the San Antonio assembly plant and all other similar vehicles not in the suspect population were assembled with a different feature code or at Navistar’s other manufacturing plants. There are 6 HV series trucks in the suspect population.
Production Dates : APR 29, 2022 – DEC 07, 2022
VIN Range 1 : Begin : NR End : NR ntial Part 573 Safety Recall Report 23V-153 Page 2 Vehicle 2 : 2023-2024 International MV
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : • The suspect population is identified by models equipped with feature code 14VAD, 14VAG, or 14VAH (Suspension, rear, single with vary-rate springs).
• The Inclusive dates of manufacture were determined by when the San Antonio manufacturing plant began production of the HV® and MV® series trucks through the date the issue was contained in production.
• The vehicles in the suspect population were assembled at the San Antonio assembly plant and all other similar vehicles not in the suspect population were assembled with a different feature code or at Navistar’s other manufacturing plants. There are 654 MV series trucks in the suspect population.
Production Dates : FEB 24, 2022 – JAN 18, 2023
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : The rear axle spring wedge shim may have been installed incorrectly oriented (180-degrees). An incorrectly oriented axle spring wedge shim can result in driveline angles out of specification. Driveline angles out of specification can cause premature wear and eventual failure of a U-joint which could result in drive shaft separation from the vehicle.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : U-joint failure resulting in drive shaft separation from the vehicle can
increase the risk of a vehicle crash resulting in property damage, personal injury, or death.
Description of the Cause : The spring wedge shim has two part numbers (P/N) on each end and the work instructions did not specify orientation by P/N for all variations. Identification of Any Warning
that can Occur : Increased driveline vibration and/or noise over time. Involved Components : Component Name 1 : Wedge, shim
Component Description : Wedge, Spring 6-degree rear/2-degree rear Component Part Number : 3518107C1/495364C1 The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-153 Page 3 Supplier Identification : Component Manufacturer
Name : NR Address : NR
NR
Country : NR Chronology :
• 02/01/2023 – Navistar Manufacturing Product Engineering discovers workstation responsible for rear axle and suspension assembly was installing the spring wedge shim in the same orientation regardless of the suspension configuration requirements.
• 02/06/2023 – Navistar Manufacturing quarantines all vehicles at the plant and inspects wedge shim orientation of suspect vehicles.
• 02/08/2023 – Navistar Manufacturing updates the work instructions to illustrate correct orientation of wedge shims according to configuration requirements.
• 02/13/2023 – Navistar Manufacturing and Engineering meet to determine failure mode of suspect population.
• 02/22/2023 – Navistar Manufacturing and Engineering meet with Compliance to discuss analysis of failure mode, root cause in manufacturing, and the effect on driveline angles. The team then initiates risk assessment of the incorrect driveline angles.
• 02/28/2023 – Navistar Manufacturing, Engineering and Compliance conclude risk analysis and determines the impact to the suspect population.
• 03/01/2023 – Navistar finalizes the suspect population.
• 03/02/2023 – Navistar declares a Safety Recall. Description of Remedy :
Description of Remedy Program : • The remedy will involve correctly orienting the rear axle wedge
shim on both the left and right side of the rear axle spring suspension.
• Navistar’s plan for reimbursement of pre-notification remedies, on file with NHTSA and dated 05/06/2022, applies and reimbursement instructions will be included in the customer notification. How Remedy Component Differs from Recalled Component :
Identify How/When Recall Condition was Corrected in Production : The remedy assembly correctly orients the rear axle wedge shims where the recalled assembly incorrectly oriented the rear axle shim wedges.
02/27/2023 – Navistar manufacturing corrects the issue by updating the work instructions to specify correct orientation of the spring wedge shims according to configuration requirements. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-153
Page 4
The information contained in this report was submitted pursuant to 49 CFR §573
Recall Schedule :
Description of Recall Schedule : It is estimated that the Customer and Dealer notification letters will be
mailed by 05/05/2023.
Planned Dealer Notification Date : MAY 05, 2023 – MAY 05, 2023
Planned Owner Notification Date : MAY 05, 2023 – MAY 05, 2023
* NR – Not Reported

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