# Service bulletin CBR 2447 072025

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: 11021326
- Published by NHTSA: 2025\-08\-04
- Manufacturer's number: CBR 2447 072025
- Manufacturer's date: 2025\-07\-09
- NHTSA component: SUSPENSION

## NHTSA's summary

CBR \- Electronically Controlled Suspension \(ECS\) calibration using Premium Tech Tool \(PTT\) is required to correct discrepancies between the cluster load indicator and actual scale values, ensuring proper functionality of liftable axles and preventing unintended axle behavior.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11021326-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11021326-9999.pdf)

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

## Components

Suspension

## Vehicles listed

- 2025 MACK PIONEER PR \(4\)

## Other bulletins for the same vehicles and component

- [CBR 2584\-4 202605](/bulletins/11033136.md), 2026-06-02, Service bulletin: SUSPENSION; ELECTRICAL SYSTEM. Electronically controlled suspension \(ECS\) calibration procedure.
- [CBR 2548\-1 202601](/bulletins/11028050.md), 2026-02-03, Service bulletin: SUSPENSION. CBR \- Shock Interference With “Z” Springs.
- [CBR 2016\-18 202511](/bulletins/11026023.md), 2025-12-03, Service bulletin: SUSPENSION; UNKNOWN OR OTHER. CBR \- Frame or Cab Lean.
- [CBR\-2016 202412](/bulletins/11012156.md), 2025-01-02, Service bulletin: SUSPENSION. Frame lean can be caused by several seemingly isolated possibilities. The two most common are suspension and frame assembly issues.

JSON: [/v1/bulletins/11021326](/v1/bulletins/11021326)

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