If an actuator fails shortly after replacement, which is a likely cause?

A likely cause of an actuator failing shortly after replacement is a failed pressure regulating valve. The pressure regulating valve is critical in maintaining the correct pressure levels within the hydraulic system. If this valve fails, it can lead to improper pressure being supplied to the actuator.

When an actuator is supplied with too high or too low pressure, it may not operate effectively, leading to premature wear or failure. This can happen even if the actuator itself is new, as it relies heavily on the integrity of the pressure regulating valve to function properly within the system's specified operational parameters.

The other options, while they can lead to issues in a fluid power system, do not directly correlate as strongly with the immediate failure of an actuator after replacement. For example, a failed quick exhaust valve might affect the actuator’s response time but would not generally lead to outright failure. An empty trap might cause cavitation or inconsistent performance, and an overfilled accumulator could lead to pressure spikes, but these scenarios typically do not directly result in actuator failure right after it has been replaced.