Questions: 11. After a hydraulic accumulator has been installed and air chamber charged, the main system hydraulic pressure gauge will not show a hydraulic pressure reading until a. at least one selector valve has been actuated to allow fluid to flow into the fluid side of the accumulator. b. the air pressure has become equal to the fluid pressure. c. the fluid side of the accumulator has been charged.

11. After a hydraulic accumulator has been installed and air chamber charged, the main system hydraulic pressure gauge will not show a hydraulic pressure reading until
a. at least one selector valve has been actuated to allow fluid to flow into the fluid side of the accumulator.
b. the air pressure has become equal to the fluid pressure.
c. the fluid side of the accumulator has been charged.

Transcript text: 11. After a hydraulic accumulator has been installed and air chamber charged, the main system hydraulic pressure gauge will not show a hydraulic pressure reading until a. at least one selector valve has been actuated to allow fluid to flow into the fluid side of the accumulator. b. the air pressure has become equal to the fluid pressure. c. the fluid side of the accumulator has been charged.

Solution

Solution Steps

Step 1: Understanding the Function of a Hydraulic Accumulator

A hydraulic accumulator is a device that stores energy in the form of hydraulic fluid under pressure. It typically consists of a gas (usually air or nitrogen) chamber and a fluid chamber separated by a bladder or piston. The gas chamber is pre-charged to a certain pressure.

Step 2: Analyzing the System Pressure Dynamics

When the hydraulic accumulator is installed and the air chamber is charged, the system pressure gauge will not show a hydraulic pressure reading immediately. This is because the fluid side of the accumulator needs to be charged with hydraulic fluid to create pressure that can be read by the gauge.

Step 3: Evaluating the Options

Option a: This option suggests that the system pressure gauge will show a reading only after a selector valve is actuated to allow fluid to flow into the fluid side of the accumulator. This is a plausible scenario because the fluid needs to enter the accumulator to create pressure.
Option b: This option implies that the system pressure gauge will show a reading when the air pressure equals the fluid pressure. However, the gauge reads hydraulic pressure, not air pressure.
Option c: This option states that the system pressure gauge will show a reading once the fluid side of the accumulator has been charged. This is accurate because the gauge measures the hydraulic pressure, which will only be present once the fluid side is charged.