What action should be taken before operating a hydraulic excavator on slopes?

Before operating a hydraulic excavator on slopes, it is essential to inspect the slope for stability. This action is crucial because the stability of the slope directly impacts both the safety of the operator and the effectiveness of the machine's operation. Slopes can vary significantly in terms of soil composition, moisture content, and overall integrity, which can pose risks of sliding, tipping, or losing control of the excavator.

Assessing the stability of the slope ensures that the machine remains secure during operation, reducing the likelihood of accidents or equipment failure. Factors to consider during this inspection include the angle of the slope, signs of erosion, and the type of material that comprises the slope. Such precautions help to establish whether it is safe to proceed with operation and if any additional measures, such as using a spotter or utilizing a more stable base, are necessary.

The other actions listed, while important in various contexts, do not address the specific concerns associated with operating on slopes. For instance, comparing fuel types or changing hydraulic fluid does not influence slope stability, and calibrating the machine's height is more relevant to achieving precise digging depths than ensuring safety on uneven terrain. Therefore, inspecting the slope for stability is the critical step in preparing for safe excavator operation on inclines