# 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.

- Type: Service bulletin
- NHTSA id: 11007531
- Published by NHTSA: 2024\-09\-09
- Manufacturer's number: SIL\-3157
- Manufacturer's date: 2024\-09\-09
- Campaign id or software version: SIL\-3157
- NHTSA component: UNKNOWN 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11007531-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11007531-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Vehicles listed

- 2016 to 2023 ALTEC DIGGER DERRICK

JSON: [/v1/bulletins/11007531](/v1/bulletins/11007531)

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