What should be ensured before raising the cab of an apparatus?

Before raising the cab of an apparatus, it is essential to shut down the apparatus and chock the wheels to ensure safety. Shutting down the vehicle prevents accidental movement of the apparatus while the cab is raised, which could lead to injury or damage. Chocking the wheels further secures the vehicle in place, providing a stable working environment. This step is crucial for maintaining safety and preventing unexpected incidents while accessing and servicing the engine compartment or performing necessary inspections. Engaging in these precautionary measures forms the foundational steps required before conducting any further maintenance or inspections on the apparatus.