# Service bulletin SF624

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: 10194482
- Published by NHTSA: 2021\-05\-27
- Manufacturer's number: SF624
- Manufacturer's date: 2021\-05\-13
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Freightliner Field Service Campaign for Freightliner M2 DD5 Fan Hub Fasteners. Fan hub bolts may be insufficiently torqued which could lead to a failure and excessive truck down time.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10194482-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10194482-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2019 to 2021 FREIGHTLINER BUSINESS CLASS M2

JSON: [/v1/bulletins/10194482](/v1/bulletins/10194482)

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