# Service bulletin 16\-044

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 bulletin
- NHTSA id: 11005516
- Published by NHTSA: 2024\-08\-02
- Manufacturer's number: 16\-044
- Manufacturer's date: 2024\-07\-30
- Campaign id or software version: 16\-044
- NHTSA component: SUSPENSION

## NHTSA's summary

Fix As Fail The height control valve \(HCV\) rod on vehicles with low air leaf suspensions is prone to toggling over center during rough road conditions. With full suspension articulation, HCV bracket flexes and toggles over center the HCV linkage, which results in either deflated airbags or makes them unable to inflate. Fix\-as\-fail start date is 07/30/2024.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11005516-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11005516-9999.pdf)

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

## Components

Suspension

## Vehicles listed

- 2018 to 2023 PETERBILT 330
- 2018 to 2023 PETERBILT 337
- 2018 to 2023 PETERBILT 348
- 2018 to 2023 PETERBILT 365
- 2018 to 2023 PETERBILT 367
- 2018 to 2023 PETERBILT 389
- 2018 to 2023 PETERBILT 520
- 2018 to 2023 PETERBILT 567
- 2018 to 2023 PETERBILT 579

## Recalls for the same vehicles and component

- [2022725](/recalls/tc/2022725.md), 2022-12-16: Suspension
- [22V939000](/recalls/nhtsa/22V939000.md), 2022-12-16: SUSPENSION:MULTIPLE AXLE
- [2020399](/recalls/tc/2020399.md), 2020-08-27: Suspension

## Other bulletins for the same vehicles and component

- [14\-043](/bulletins/10222269.md), 2022-10-05, Service bulletin: SUSPENSION. Fix\-As\-Fail On certain chassis with Low Air Leaf Suspension or Low\-Low Air Leaf Suspension, the Height Control Valve \(HCV\) arm may be rubbing on other components when the bend in the arm is facing outboard. Flipping the bend in the HCV arm inboard prevents the rub.
- [16\-041](/bulletins/10165711.md), 2019-10-04, Service bulletin: SUSPENSION. Non Safety Campaign: Peterbilt has determined that certain Model 365, 384, 386, 388, 389, 3895, 587 and 579 vehicles built between March 27, 2012 and January 20, 2019 with Flex Air suspension in a 6x2 configuration have U\-bolts that may fail prematurely.

JSON: [/v1/bulletins/11005516](/v1/bulletins/11005516)

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