Altec has learned that certain DH, D3000, AN, and AM units built with three stage A-frame outrigger...
Altec technical service bulletin SIL-3312 for 2025 Altec An Series Aerial Device and 2025-2026 Altec Digger Derrick.
- Bulletin number
- SIL-3312 (SIL-3312)
- Component
- Unknown or other
- 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.
Vehicles covered
- Altec An Series Aerial Device 2025 2025
- Altec Digger Derrick 2025-2026 20252026
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