Long-reach boom-and-arm kits convert a standard 30-50 tonne crawler excavator into a long-reach machine capable of 17-25m dig reach. Useful for dredging, slope work, and reservoir construction.
When to convert vs buy purpose-built
- Convert — occasional long-reach use, existing machine in good condition
- Buy purpose-built (Kobelco SK850 LR) — sustained long-reach duty, mining-feeder operations
Cost of conversion
Long-reach kits cost $30-80k depending on machine class and reach length. Installation takes 1-2 weeks. Loaded productivity is 30-40% lower than standard configuration, so don't expect to use the long-reach machine for normal work.
Considerations
- Lifting capacity reduces significantly at extended reach
- Hydraulic cylinder uprate often required
- Counterweight uprate may be needed for stability
- Conversion-warranty considerations vs manufacturer warranty