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Service bulletin L974 Rev-C

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 id10151431
Published by NHTSA2018-12-10
Manufacturer's numberL974 Rev-C
Manufacturer's date2018-09-01
NHTSA componentSERVICE BRAKES; SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DRUM:DRUM; SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DRUM

NHTSA's summary

Operation Name: Hendrickson Trailer Commercial Vehicle Systems Document Name: Technical Procedure - Trailer Suspension Systems, Drum Brake Service Procedures Summary: This document provides service procedures for Hendrickson drum brake assemblies.

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

Brakes, Brake drums and shoes

Vehicles listed
HENDRICKSON HENDRICKSON

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