24KWF – Steering Gear Shaft May Fracture – 2025 Kenworth T280, T380, T480, T680, T880, & W990

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OMB Control No.: 2127-0004
Part 573 Safety Recall Report 24V-233
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
PACCAR Incorporated MAR 27, 2024 NHTSA Recall No. : 24V-233 Manufacturer Recall No. : 24PBF 24KWF Manufacturer Information :
Manufacturer Name : PACCAR Incorporated
Address : 777 106TH AVENUE NORTHEAST BELLEVUE WA 98004
Company phone : 940 591 4220
Population :
Number of potentially involved : 782 Estimated percentage with defect : 5 %
Vehicle Information : Vehicle 1 : 2025-2025 Peterbilt 536, 548, 567, 579 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : Vehicles with steering gears installed (on production line and offline) while suspect steering gears were at the plants that have not been inspected during the containment sweep.
Production Dates : AUG 02, 2023 – JAN 11, 2024
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2025-2025 Kenworth T280, T380, T480, T680, T880, W990 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : Vehicles with steering gears installed (on production line and offline) while suspect steering gears were at the plants that have not been inspected during the containment sweep.
Production Dates : OCT 03, 2023 – JAN 16, 2024
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : R.H. Sheppard states that certain vehicles may contain a steering gear with a sector shaft that may not meet hardness requirements for the gear teeth.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : Sector shaft gear teeth with lower than required hardness may prematurely Part 573 Safety Recall Report 24V-233 Page 2 Description of the Safety Risk : wear, crack or fracture. A fractured gear tooth may interfere with the gear
mechanism leading to binding. A steering gear that binds increases the
likelihood of a crash.
Description of the Cause : R.H. Sheppard explained that a lack of properly working controls on the heat treat oven allowed for some shafts in the batch to have lower than required hardness. Identification of Any Warning
that can Occur : Driver may hear a popping sound when a tooth fractures. Involved Components : Component Name 1 : Steering Gear Component Description : Steering Gear Assembly
Component Part Number : HD94PCB31, HD94PN32, HD94PN33, HD94PP32, J87-6024, J87-6038-001, J87-6043-002, J87-6043-003 Component Name 2 : Steering Gear Component Description : Steering Gear Assembly
Component Part Number : HD94SC12, HD94SC14, J87-6025, J87-6040-001, J87-6040-002 Supplier Identification : Component Manufacturer
Name : R.H. Sheppard
Address : 101 Philadelphia Street
Hanover Pennsylvania 17331-0877 Country : United States Chronology :
01-17-24: Safety and compliance notified by supplier quality that R.H. Sheppard notified them of the issue. Investigation opened. Steering gear serial number inspection and containment began at all affected plants. 01-31-24: Containment complete at all affected plants. 02-09-24: Sheppard notified PACCAR that they submitted an equipment recall. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 24V-233
Page 3
The information contained in this report was submitted pursuant to 49 CFR §573
02-19-24: Began compiling suspect chassis list. 03-05-24: Met with Sheppard to review low hardness shaft steering gear testing and warranty history. 03-11-24: Reviewed containment data with affected plants to firm suspect population.
03-21-24: Full safety committee concurrence with Sheppard equipment recall on determination of safety related defect. As of 03/22/2024, PACCAR received 0 warranty claims and 0 reports about 0 trucks in the field that may be related. 0 reports of deaths or injuries have been received.
Description of Remedy :
Description of Remedy Program : Affected vehicle owners will be notified and dealers will inspect steering
gear serial numbers and replace suspect steering gears free of charge. Owners who incurred costs to obtain a remedy for the problem addressed by the recall in advance of receiving notification may seek reimbursement through the process outlined in the general reimbursement plan on file. How Remedy Component Differs from Recalled Component :
Identify How/When Recall Condition was Corrected in Production : The only way to distinguish a recalled gear and a remedy component is by inspecting the steering gear serial number.
Supplier’s heat treat oven was repaired and re-certified January 2024 to produce properly heat treated sector shafts. Recall Schedule :
Description of Recall Schedule : Dealers and customers will be notified within 60 days.
Planned Dealer Notification Date : MAY 26, 2024 – MAY 26, 2024
Planned Owner Notification Date : MAY 26, 2024 – MAY 26, 2024
* NR – Not Reported

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Safety Recall 24KWF: Sheppard Steering Gear Sector Shaft
Number
24KWF / 24V233 / 2024-197
Supplier
R. H. Sheppard Co., Inc.
Description
Sheppard Steering Gear Sector Shaft
Date
4/5/2024
What’s New
SAFETY RECALL- INTERIM NOTIFICATION
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Certain Kenworth vehicles from model year 2025 may contain steering gear{s) with a sector shaft that may not
meet hardness requirements for the gear teeth due to improper heat treating during assembly. Sector shaft
gear teeth with lower than required hardness may prematurely wear, crack, or fracture. A fractured gear tooth
may interfere with the gear mechanism leading to binding which in turn may increase the likelihood of a crash.
This bulletin will be updated when repair parts and procedures a re available.
Introduction
Certain Kenworth vehicles from model year 2025 may contain steering gear{s) with a sector shaft that may not
meet hardness requirements for the gear teeth due to improper heat treating during assembly. Sector shaft
gear teeth with lower than required hardness may prematurely wear, crack, o r fracture. A fractured gear tooth
may interfere with the gear mechanism leading to binding which in turn may increase the likelihood of a crash.
The driver may hear a popping sound when a tooth fractures.
This bulletin will be updated when repair parts and procedures are available.
Situation
686 (619 US and 67 Canada) Model Year 2025 T280/T380/T480/T680/T880/W990 chassis built from
10/03/2023 through 01/16/2024 with suspect steering gears.
Resolution
Safety Recall
INTERIM NOTIFICATION
This bulletin will be updated when repair parts and procedures are available.
Federal Law
It is a violation of Federal law for a dealer to sell or lease new vehicles covered by th is recall until the defect or
noncompliance has been corrected.
Links
Chassis List
US Customer Letter
Canada Customer Letter
Authored by. JK

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