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Service bulletin H633, Rev. F

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 id10138452
Published by NHTSA2018-05-21
Manufacturer's numberH633, Rev. F
Manufacturer's date2018-03-01
NHTSA componentSUSPENSION

NHTSA's summary

Operation Name: Hendrickson Auxiliary Axle Systems Document Name: Technical Procedure - COMPOSILITE SC Steerable Auxiliary Axle Suspension Systems, Installation and Preventive Maintenance Procedure Summary: This document provides installation and preventive maintenance procedures for Hendrickson COMPOSILITE SC steerable auxiliary axle suspension systems.

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

Suspension

Vehicles listed
HENDRICKSON HENDRICKSON

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