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Service bulletin SB1997

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 id10194441
Published by NHTSA2021-05-25
Manufacturer's numberSB1997
Manufacturer's date2021-05-07
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN; POWER TRAIN

NHTSA's summary

Optimization of 3-speed fan clutch control. FIELD CHANGE PROGRAM: Van Hool has optimized the multiplex program regarding to the 3-speed fan clutch control. This optimization will give a solution for the overheating issues at certain operation conditions. Owners and operators are requested to load the new multiplex program according to the step-by-step instructions given in this service bulletin.

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, Transmission and driveline, Cooling fan, Cooling system

Vehicles listed
VAN HOOL TDX252021

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