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Service bulletin 01-93

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 id10026123
Published by NHTSA2008-10-01
Manufacturer's number01-93
Manufacturer's date2008-07-01
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS; ENGINE AND ENGINE COOLING:ENGINE

NHTSA's summary

FREIGHTLINER: CUMMINS ISB DRIVE BELT JUMPING. THE POLY-V SERPENTINE DRIVE BELT MAY JUMP OFF ONE OR MORE OF THE PULLEYS DURING OPERATION. *PE

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine, Drive belts

Vehicles listed
FREIGHTLINER BUSINESS CLASS M22000 to 2008

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