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Service bulletin SIL-3157

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 id11007531
Published by NHTSA2024-09-09
Manufacturer's numberSIL-3157
Manufacturer's date2024-09-09
Campaign id or software versionSIL-3157
NHTSA componentUNKNOWN OR OTHER

NHTSA's summary

Altec has learned that the structural subbase welds on certain DH derricks built from July 2016 to December 2023 could contain stitch welds rather than the required continuous welds, which could result in cracks forming in the subbase.

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.

Vehicles listed
ALTEC DIGGER DERRICK2016 to 2023

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