# Service campaign 26PACA

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service campaign
- NHTSA id: 11028852
- Published by NHTSA: 2026\-02\-18
- Manufacturer's number: 26PACA
- Manufacturer's date: 2026\-02\-28
- Campaign id or software version: 26PACA
- NHTSA component: STEERING

## NHTSA's summary

KW: Certain Kenworth L770 chassis may have Right\-Hand \(RH\) steering cross shaft bearing mounting holes that are misaligned, resulting in increased stress on the steering cross shaft on the Right\-Hand Stand\-Up \(RHSU\) controls configuration. Failure of the RH steering cross shaft could result in the loss of RH steering control which may increase the risk of a crash. PB: Certain Peterbilt Model 520 / 520 BEV chassis may have Right\-Hand \(RH\) steering cross shaft bearing mounting holes that are misaligned, resulting in increased stress on the steering cross shaft on the Right\-Hand Stand\-Up \(RHSU\) controls configuration. Failure of the RH steering cross shaft could result in the loss of RH steering control which may increase the risk of a crash.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11028852-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11028852-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Steering

## Vehicles listed

- 2026 KENWORTH L770
- 2026 PETERBILT 520

## Recalls for the same vehicles and component

- [2026014](/recalls/tc/2026014.md), 2026-01-19: Steering
- [26V022000](/recalls/nhtsa/26V022000.md), 2026-01-19: STEERING

## Other bulletins for the same vehicles and component

- [24KWC/24PBC](/bulletins/11036296.md), 2026-08-20, Service bulletin: STEERING. Updated Sheppard Steering Gear Classification Tool link in Inspection Procedure
- [26PACA](/bulletins/11033376.md), 2026-06-03, Service bulletin: STEERING. Updated cross shaft and bearing installation steps have been added to the repair procedures.
- [46\-028](/bulletins/11033352.md), 2026-06-03, Service campaign: STEERING. Certain Peterbilt Model 520 BEV chassis with an Accelera Power Control and Accessory System \(PCAS\) were manufactured without a check valve in the power steering system.
- [15\-034](/bulletins/11029729.md), 2026-03-05, Service campaign: STEERING. Battery Electric Vehicle \(BEV\) de\-energizing and re\-energizing procedures have been added to the bulletin for Peterbilt Model 520 BEV.
- [15\-034](/bulletins/11027059.md), 2026-01-06, Service bulletin: STEERING. Certain Kenworth L770 and Peterbilt Model 520 chassis may encounter a slight increase in effort in the right\-hand steering shaft when turning the wheel.

JSON: [/v1/bulletins/11028852](/v1/bulletins/11028852)

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