# Service bulletin SIL\-3312

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: 11038483
- Published by NHTSA: 2026\-10\-16
- Manufacturer's number: SIL\-3312
- Manufacturer's date: 2026\-10\-13
- Campaign id or software version: SIL\-3312
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

Altec has learned that certain DH, D3000, AN, and AM units built with three stage A\-frame outrigger assemblies from October 2025 to February 2026 could have been manufactured with the incorrect revision of the stop block. Some A\-frames were built with the incorrect stop block which can cause the unit to experience a drop of the intermediate section of the outrigger leg when deploying, which can cause damage to the cylinder and cause loss of cylinder function.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11038483-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11038483-9999.pdf)

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

## Vehicles listed

- 2025 ALTEC AN SERIES AERIAL DEVICE
- 2025 to 2026 ALTEC DIGGER DERRICK

JSON: [/v1/bulletins/11038483](/v1/bulletins/11038483)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20SIL-3312&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11038483&vehicle=Service%20bulletin%20SIL-3312)