An operator is positioned on uneven ground with the outriggers fully extended and level. The Load Moment Indicator (LMI) displays a warning for an approaching overload condition, but the load chart indicates the current boom angle and extension should permit the lift. What is the most probable cause for this discrepancy?

Question: An operator is positioned on uneven ground with the outriggers fully extended and level. The Load Moment Indicator (LMI) displays a warning for an approaching overload condition, but the load chart indicates the current boom angle and extension should permit the lift. What is the most probable cause for this discrepancy?

Answer options:

• The LMI system is malfunctioning and needs recalibration.
• The load's centre of gravity is not directly beneath the boom tip.
• The ground conditions are not providing adequate support, despite the outriggers. ✅ A heavy attachment is being used which was not accounted for by the LMI's initial setup.

Correct answer: A heavy attachment is being used which was not accounted for by the LMI's initial setup.

Explanation: If the LMI is showing a warning and the load chart suggests the lift is within limits, a common reason is that the LMI's internal calculations for the combined weight of the load and attachment are incorrect. Often, a heavy attachment has been installed but not properly selected or accounted for in the LMI system’s programming, leading to an underestimation of the actual moment. While ground conditions can be an issue, the premise states outriggers are fully extended and level, and the LMI primarily measures the moment, not ground bearing pressure directly. Load's COG not being beneath the boom tip affects stability, but the LMI is designed to measure the moment created by the actual load and attachment relative to the telehandler's centre of rotation.