Question 206General Subjects - Assistant Engineer

The correct answer is C) remove all hydraulic system pressure and bring the pneumatic pressure to the accumulator preload pressure. To charge a bladder-type hydraulic accumulator, you need to remove all hydraulic system pressure and bring the pneumatic pressure to the accumulator's preload pressure, which is the pressure in the gas-filled chamber before any hydraulic fluid is added. This ensures the accumulator is properly pressurized and ready to function as designed. The other options are incorrect because: A) would not bring the pneumatic pressure to the correct preload level, B) would increase the pressure too much, and D) would not properly pressurize the gas chamber first.