How do you release air out of a hydraulic pump of a cat 318cl excavator?

To release air from the hydraulic pump of a Cat 318CL excavator, start by ensuring the machine is on a level surface and the engine is off. Then, locate the bleeder valves on the hydraulic system, usually found near the hydraulic pump or on the hydraulic cylinders. Open the valves slowly to allow trapped air to escape, while monitoring for any hydraulic fluid leakage. Once air is released and fluid flows steadily without bubbles, close the valves securely before restarting the engine and testing the system.