If a hydraulic elevator trips its low oil timer and the oil level is good, what should be checked?

When a hydraulic elevator trips its low oil timer despite having a good oil level, it indicates there may be an issue not with the oil level itself but with the system's ability to properly move or utilize that fluid. One essential aspect to consider in this scenario is the pump and its associated components.

Focusing on pump belts is critical because they directly affect the pump’s ability to create the necessary pressure for the elevator to operate. If the belts are worn, loose, or damaged, the pump may not be able to generate adequate hydraulic pressure, which could lead the system to think that there is insufficient oil or that the system is malfunctioning. This is why checking the pump belts, assessing their condition, and ensuring they are functioning is vital for the elevator's operation.

While the other options involve important system components, they do not directly address the potential failure in hydraulic fluid circulation or pressure generation as effectively as examining the pump belts would. It's essential for an elevator technician to keep a structured approach when diagnosing issues and ensure that hydraulic fluid quality and overall electrical systems are also maintained, however, the immediate next step after confirming oil level is to check pump belts first.