What two parts of the hydraulic ram must be checked for proper function?

The correct choice highlights the importance of both seals and rams in ensuring the hydraulic ram functions correctly. Seals are essential because they prevent fluid leakage, which can lead to loss of pressure and affect the overall performance of the hydraulic system. Any deterioration in the seals can compromise the efficiency and reliability of the equipment.

The term "rams" refers to the components involved in the actual movement within the hydraulic system. They need to be in good condition to generate and maintain the necessary pressure for lifting and dumping operations. A malfunctioning ram could directly impact the ability to perform its intended tasks effectively.

Regular inspection of both seals and rams ensures that the hydraulic system remains operational and safe for use, which is critical in a heavy-duty application like a dump truck. Therefore, understanding the roles of these components is vital for maintenance and the reliable performance of the vehicle.