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Service bulletin FSB 641-010

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 id10110376
Published by NHTSA2017-08-04
Manufacturer's numberFSB 641-010
Manufacturer's date2017-03-14
NHTSA componentSTEERING

NHTSA's summary

When pressure washing the LR truck, do not pressure wash the steering shaft. Direct pressure washing of the LR steering shaft may lead to oxidation inside the shaft due to high pressure water gaining access and entry into the steering shaft joints.

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

Steering

Vehicles listed
MACK LR

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