CDC Z2a655 Hydraulic Journeyman Vol 3

If a hydraulic system is found to be contaminated, the best place to begin draining the affected system would be the reservoir. The reservoir is the main storage tank for hydraulic fluid, and draining it would help remove any contaminated fluid from the system. By starting with the reservoir, it ensures that the majority of the contaminated fluid is removed before moving on to other components such as the brakes, flap actuators, or aileron actuators. This helps prevent further contamination and allows for a more effective cleaning and maintenance process.

Hydraulic manifolds are used in a hydraulic system to provide a location where common fluid lines can come together. This allows for the distribution of hydraulic fluid to different components of the system efficiently. By connecting the common fluid lines, the manifold ensures that the fluid flows smoothly and evenly to all the necessary parts, optimizing the performance of the hydraulic system.

When filling a system reservoir, it is important to observe the fluid level because overfilling may cause the reservoir to rupture. This means that if the reservoir is filled beyond its capacity, the pressure inside the reservoir may increase to a point where it exceeds the strength of the reservoir material, causing it to break or burst open. This can lead to leakage of the fluid and potential damage to the system. Therefore, it is crucial to avoid overfilling to prevent such a catastrophic failure.

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When electrical power is lost in a hydraulic power system, the solenoid-operated shutoff valves would be in the open position. This means that the valves would allow the flow of hydraulic fluid to continue, ensuring that the system remains operational even without electrical power.

A wire screen used in a non-pressurized reservoir is called a finger screen. This type of screen is typically made up of multiple parallel wires or bars that are spaced apart to allow water to pass through while trapping larger debris such as leaves, sticks, or other solid particles. The term "finger" refers to the shape of the individual wire or bar elements, which resemble fingers when viewed from the side. The finger screen helps to prevent clogging or blockage of the reservoir by removing larger contaminants from the water flow.

The spring force would be 300 pounds because the relief valve is designed to relieve pressure up to 1800 pounds per square inch (PSI) and has a ball seat area of 1/6 square inch. The spring force is the force exerted by the spring to keep the relief valve closed until the pressure exceeds the set limit. In this case, the spring force is calculated by multiplying the pressure (1800 PSI) by the ball seat area (1/6 square inch), which equals 300 pounds.

In an emergency, the engine-driven hydraulic pump shutoff valves may be operated by pulling the T-handle. This action allows for the immediate shutdown of the hydraulic pump, which can help prevent further damage or potential hazards in the event of an emergency. Pulling the T-handle is a quick and effective way to stop the hydraulic pump from operating and is a standard procedure in emergency situations.

Variable-volume pumps do not require a separate pressure-regulating device in the system because they have an integral flow control valve (compensator). This valve allows the pump to automatically adjust the flow rate based on the system's pressure requirements, effectively regulating the pressure without the need for an additional device. This feature eliminates the need for a separate pressure-regulating device, making the system more efficient and cost-effective.

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Whenever a jumper wire is installed in any system, it is necessary to place a write-up in the aircraft forms under a red X. This is done to document the installation of the jumper wire and indicate that it was not part of the original system design. This helps in maintaining a record of any modifications or changes made to the system and ensures that proper documentation is available for future reference or troubleshooting purposes.

To ensure that an automatic check valve is installed properly, you should make sure that the arrow marked on the valve housing is pointing in the direction of free-flow. This is because the arrow indicates the direction in which the fluid should flow through the valve. Installing the valve in the opposite direction of free-flow can result in the valve not functioning correctly and potentially causing damage to the system.

The correct answer is the AFT LOADMASTER'S CONTROL PANEL. This panel is responsible for manually operating the cargo door and ramp. It allows the loadmaster to control the opening and closing of the cargo door as well as the extension and retraction of the ramp. This panel is typically located towards the rear of the aircraft, near the cargo area, to provide easy access and control for the loadmaster.

A microswitch is used in a typical electrically sequenced system to ensure proper sequencing. A microswitch is a small switch that is activated by a physical force, such as the movement of a component or the presence of a certain condition. In this context, the microswitch would be used to detect the completion of a certain step or the presence of a certain condition before allowing the system to proceed to the next step. This ensures that the sequence of operations is followed correctly and prevents any potential issues or malfunctions.

Sequence valves are installed in a hydraulic system to ensure that one operation is performed before the rest of the system can operate. This is important in situations where a specific order of operations is required for the system to function properly. The sequence valve allows for the controlled flow of fluid to different actuators, ensuring that each actuator extends and retracts at the appropriate time. By regulating the sequence of operations, the sequence valve helps to prevent damage to the system and ensures its efficient and safe functioning.

The correct answer is GLAND NUTS. Gland nuts are the components that connect the tandem surge boots to the fuel-tube weld assembly in the in-air refueling (A/R) system. They are used to secure and seal the connection between the surge boots and the fuel-tube assembly, ensuring a tight and reliable connection for fuel transfer during refueling operations.

When disassembling a brake, you should not disassemble the grip and tube parts of the assembly because they are mated parts. Mated parts are designed to fit together and work as a unit, and disassembling them may cause damage or affect the functionality of the brake. Therefore, it is recommended to leave the grip and tube parts intact during the disassembly process.

When taking fluid samples on a hydraulic system, it is important to take the sample from the reservoir and various other locations in the system. This is because different components within the system may have different levels of contamination or wear, and taking samples from multiple locations allows for a more comprehensive analysis of the system's overall condition. By sampling from various locations, potential issues or abnormalities can be identified and addressed before they lead to more serious problems or system failures.

When the pump low-pressure warning light illuminates while the engines are running and the pressure reading on the accumulator pressure gauge reads low, the first component that should be suspected of having a malfunction is the engine-driven pump. This is because the engine-driven pump is responsible for supplying the necessary pressure to the system, and if it is not functioning properly, it can result in low pressure in the system.

A wooden dowel would be the most suitable tool to remove the sleeve from a selector valve body. This is because a wooden dowel is a non-abrasive and non-magnetic tool that can be used to gently tap and push out the sleeve without causing any damage to the valve body. Using a magnet, drift punch, or needle-nose pliers may result in scratching, denting, or magnetizing the valve body, which could affect its functionality. Therefore, a wooden dowel is the best option for safely and effectively removing the sleeve.

A manually-operated check valve is usually installed on the pressure line. This is because the check valve is designed to allow fluid flow in one direction only, preventing backflow and maintaining pressure in the system. By installing the check valve on the pressure line, it ensures that the fluid flows in the desired direction and maintains the required pressure.

During one complete cycle of a single acting double displacement type hand pump, fluid is drawn through the inlet (supply) line on one stroke and forced out on both strokes. This means that during the first stroke, the fluid is drawn into the pump through the inlet line, and during both the first and second strokes, the fluid is forced out of the pump.

A filter assembly with a differential pressure indicator operates based on the principle of the difference between the pressure entering the element and the pressure leaving the element. This means that the indicator measures the pressure drop across the filter element, which indicates the level of contamination or clogging in the filter. As the filter becomes more contaminated, the pressure drop increases, and the differential pressure indicator provides a visual or audible signal to alert the operator to the need for maintenance or replacement of the filter element.

The correct answer is "PLUNGER". In a poppet-type solenoid-operated selector valve, the poppets are attached to the solenoids by a plunger. The plunger is a cylindrical component that moves back and forth within the solenoid, controlling the opening and closing of the valve. When the solenoid is energized, the plunger is pulled in, allowing the poppets to open and fluid to flow through the valve. When the solenoid is de-energized, the plunger returns to its original position, closing the poppets and stopping the flow of fluid.

If you try to open the bomb doors with pressure in the door close line, it could cause damage to the aircraft. This is because the pressure in the door close line is meant to keep the bomb doors closed, and attempting to open them against this pressure could put strain on the aircraft's structure or components.

Spoilers are flight control surfaces that are used to augment the ailerons to achieve the roll rate command either by the pilot or autopilot. Spoilers are located on the wings and are used to disrupt the airflow over the wings, which reduces lift and causes the aircraft to roll. By deploying the spoilers asymmetrically, the pilot or autopilot can control the roll rate of the aircraft. This allows for precise control during maneuvers and helps maintain stability and control in various flight conditions.

The trim system in the aircraft's roll axis compensates for imbalance or external environmental conditions that affect stabilized flight. It helps to adjust the control surfaces to maintain the desired attitude and balance of the aircraft, allowing for smoother and more efficient flight. This can be done mechanically, hydraulically, or electrically depending on the specific aircraft and its systems.

The next component that should be checked is the antiskid control box. This is because the pilot has reported that the antiskid system is completely inoperative, and the antiskid control box is responsible for controlling and regulating the antiskid system. By inspecting the control box, any potential issues or malfunctions can be identified and addressed to restore the functionality of the antiskid system.

Air bubbles coming out of the accumulator end cap during an internal leakage test indicate internal leaking of the accumulator piston. This means that there is a problem with the sealing of the piston, allowing air to escape from the piston area. This can lead to a decrease in the accumulator's performance and efficiency. It is important to address this issue to ensure the proper functioning of the accumulator.

During the breakaway of the air-refueling nozzle, the valve that prevents excessive pressure buildup in the toggle actuators is the relief valve. This valve is designed to open and release pressure when it reaches a certain threshold, ensuring that the pressure does not exceed safe levels and cause damage to the toggle actuators.

An internal leakage test should be performed to determine if the accumulator piston seals are leaking or bypassing. This test involves pressurizing the accumulator and monitoring the pressure over a period of time. If the pressure drops significantly, it indicates that there is internal leakage occurring, which could be caused by faulty piston seals. This test helps to identify any issues with the seals and allows for necessary repairs or replacements to be made.

A standpipe in a reservoir is used to reserve fluid for the emergency pump. In case of any emergency or failure of the main pump, the standpipe ensures that there is a backup supply of fluid available to power the emergency pump. This helps to maintain the functionality and operation of the system even in critical situations.

The first thing you should check is the press-to-test feature of the warning light. This feature allows you to manually test the functionality of the warning light. If the light fails to illuminate during the test, it indicates a problem with the warning light itself rather than any other potential issues such as internal leakage in the valve, electrical power at the pump, or the low-pressure warning switch.

After bleeding the power system and removing all the air bubbles, it is recommended to bleed out an additional 1 quart of fluid. This is necessary to ensure that any remaining air pockets are completely eliminated from the system, which could potentially cause issues with the power system's performance. By bleeding out this additional amount of fluid, the system will be properly filled and free from any air bubbles, allowing it to function optimally.

The dual shuttle valve is the hydraulic component in the bomb door system that controls normal and emergency hydraulic pressure to the forward door hydraulic actuator.

The correct answer suggests that the first thing the hydraulic technician should do is consult the appropriate Fault Isolation (FI) manual. This manual contains detailed instructions and procedures for troubleshooting and isolating faults in the hydraulic system. By consulting the FI manual, the technician can find specific steps to identify and resolve the issue with the roll input in the mechanical code of operation. It is important to consult the FI manual as it provides the necessary guidance to diagnose and fix hydraulic system problems effectively.

Hydraulically actuated downlocks aid in forcing the cargo door down. These downlocks are components that use hydraulic pressure to secure and lock the cargo door in place. By applying hydraulic force, the downlocks ensure that the cargo door remains closed and prevents it from opening during flight or while the aircraft is in motion. This mechanism provides a strong and reliable locking mechanism for the cargo door, ensuring the safety and security of the cargo and the aircraft.

A check valve is a type of orifice that allows normal speed of operation in one direction but limits speed in the other. It is designed to allow fluid or air to flow freely in one direction while preventing backflow or reverse flow in the opposite direction. This restriction of flow in one direction helps to control the speed of operation, ensuring that it remains within a desired range.

In a nonautomatic hydraulic actuating system, the selector valve is controlled manually by the operator. This means that the operator physically manipulates the valve to direct the flow of hydraulic fluid. This manual control allows the operator to choose the desired function or operation of the system by adjusting the position of the selector valve. It provides the operator with direct control and flexibility in managing the hydraulic system's functions and operations.

If the steering became sluggish, the item within the metering valve that might be suspected of causing the problem is the metering valve filter becoming clogged. This is because a clogged filter can restrict the flow of fluid through the metering valve, leading to decreased steering response and sluggishness.

The purpose of the fluid quantity system test is to test the indication system. This is because the fluid quantity system is responsible for measuring and indicating the amount of fluid (such as fuel or oil) present in a system or tank. By testing the indication system, one can ensure that the measurements and readings provided by the system are accurate and reliable, allowing for proper monitoring and management of fluid levels.

When the boom is being flown, the position of the boom hoist lever is set to "FREEWHEEL". This means that the boom hoist is disengaged and the boom can move freely without any restriction or control from the lever. This allows for smooth and unrestricted movement of the boom during flight operations.

A motor-operated shutoff valve gives a positive indication of the position of the valve because it uses an electric motor to control the opening and closing of the valve. This motor is connected to a position indicator, such as a limit switch or a feedback sensor, which provides feedback on the exact position of the valve. This allows operators to easily monitor and verify the status of the valve, ensuring that it is fully open or fully closed as intended.

The most likely cause for the air refueling (A/R) ready indicator light failing to illuminate when the A/R master switch is turned on is a faulty signal amplifier circuit breaker. The signal amplifier circuit breaker is responsible for providing power to the indicator light, so if it is faulty or not functioning properly, the light will not illuminate.

The probable cause for the air refueling (A/R) signal system failing to advance to the made condition upon contact with the receiving aircraft could be a malfunctioning or faulty signal coil.

Hydraulic flow regulators are devices that control the flow of fluid in a hydraulic system. They are designed to regulate fluid flow in one direction only, allowing the fluid to flow freely in that direction while restricting or blocking it in the opposite direction. This ensures that the fluid can only flow in the desired direction, providing control and stability to the hydraulic system.

When the fluid does not split evenly in the flow equalizer, it means that there is an imbalance in the flow. In order to maintain balance and equal distribution of the fluid, the free floating piston, which is designed to move freely, will shift its position. This movement of the piston allows the fluid to redistribute itself and achieve a more even flow.

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The bomb door control valve ground check light will illuminate when the pressure in the door close line reaches a minimum of 1500 PSI with a tolerance of plus or minus 50 PSI.

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