Which of the following would be a proper solution if a vane style vacuum pump loses vacuum?

A proper solution for a vane style vacuum pump that loses vacuum is to clean and flush the pump. Over time, dirt, debris, and other contaminants can accumulate inside the pump, leading to decreased efficiency and ultimately causing a loss of vacuum. By cleaning and flushing the pump, you remove these obstructions, which can restore the pump to its optimal functioning condition.

This maintenance step is crucial because vane pumps rely on precise movement and spacing to create an effective vacuum. Residue buildup can interfere with the operation, resulting in decreased performance. Regular cleaning and maintenance allow for longevity and reliability in vacuum systems.

While other options might address different aspects of pump maintenance, they may not directly resolve the issue of losing vacuum as effectively as cleaning and flushing the pump does. For instance, draining excess oil and lubricating bearings concern pump lubrication and operation but may not be directly related to vacuum loss caused by contamination or blockages. Cleaning out cold traps may help with a larger system’s efficiency but does not address the internal condition of the pump itself.