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Service bulletin TSB190059-050320

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 id10162097
Published by NHTSA2019-07-08
Manufacturer's numberTSB190059-050320
Manufacturer's date2019-05-03
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

This Technical Service Bulletin describes the verification and resolution of water pump belt squeal or jump on front end accessory drive. A shorter water pump drive belt was introduced to increase belt tension, reduce belt squeal, and belt jumping teeth on idler.

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 B6.7
CUMMINS ISB6.7

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