Hydraulic and Pneumatic Power Systems Hydraulic system accumulators serve which of the following functions? 1. Dampen pressure surges. 2. Supplement the system pump when demand is beyond the pump’s capacity. 3. Store power for limited operation of components if the pump is not operating. 4. Ensure a continuous supply of fluid to the pump. a. 2, 3. b. 1, 2, 3, 4. c. 1, 2, 3.