# Service bulletin TSB250073

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: 11022749
- Published by NHTSA: 2025\-09\-05
- Manufacturer's number: TSB250073
- Manufacturer's date: 2025\-08\-30
- NHTSA component: ENGINE

## NHTSA's summary

This Technical Service Bulletin describes the verification and resolution steps for the cooling package assembly of the C500D6RE and C1000D6RE trailered generator sets which may include an over\-constrained radiator core, resulting in cracking of the radiator core and subsequent coolant leaks. This is an update to a previously submitted communication.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11022749-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11022749-9999.pdf)

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

## Components

Engine

## Vehicles listed

- CUMMINS C1000D6RE
- CUMMINS POWER GENERATION C500D6RE

JSON: [/v1/bulletins/11022749](/v1/bulletins/11022749)

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