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Service bulletin TSB250166

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11034584
Published by NHTSA2026-07-07
Manufacturer's numberTSB250166
Manufacturer's date2026-06-02
NHTSA componentENGINE

NHTSA's summary

This Technical Service Bulletin describes the verification and resolution steps for the cooling package assembly of the C500D6RE trailered generator set 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

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
CUMMINS POWER GENERATION C500D6RE

Listing a model year does not mean every vehicle of it is concerned: the document says which.