Altec has learned that the velocity fuse, part of the HOP plumbing on the lower boom lift cylinder, may...
Altec technical service bulletin SIL-3209 for 2022-2025 Altec Digger Derrick.
- Bulletin number
- SIL-3209 (SIL-3209)
- Component
- Unknown or other
- Summary
- Altec has learned that the velocity fuse, part of the HOP plumbing on the lower boom lift cylinder, may close and fail to open due to air in the circuit during normal operation on certain D3000H, DT65H, and DT85H series derricks built from July 2022 to May 2025. This can prevent the hydraulic overload protection system from operating properly to prevent a structural overload of the boom.
Vehicles covered
- Altec Digger Derrick 2022-2025 2022202320242025
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