What must be kept clean to prevent electrical failure in aerial lifts?

To prevent electrical failure in aerial lifts, it is crucial to maintain the cleanliness of insulated hydraulic fluids. While insulation is fundamental for the safe operation of electrical components, any contamination or degradation of hydraulic fluids can lead to hazardous conditions, potentially causing electrical components to malfunction or failing to provide the necessary isolation. Insulated hydraulic fluids serve as a barrier to prevent unintended electrical conduction, making their cleanliness essential for the safe operation of the equipment.

While battery terminals, exterior surfaces, and all electrical connections also play important roles in the overall maintenance and safety of aerial lifts, focusing on the cleanliness of insulated hydraulic fluids particularly emphasizes their unique role in protecting against electrical failure. Other choices also contribute to safe operation, but the specific role of insulated hydraulic fluids makes this the primary focus for preventing electrical failures in aerial lifts.