Aviation Mechanic - General, Airframe, and Powerplant › II. Airframe › Task F. Hydraulic and Pneumatic Systems

AM.II.F.K2

Knowledge

Hydraulic system operation.

Study note

Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Aviation Maintenance Technician Handbook - Airframe p. 12-5
Chapter 12: Hydraulic & Pneumatic Power Systems › Basic Hydraulic Systems › Open Center Hydraulic Systems
Operation of the system following actuation of the component depends on the type of selector valve being used. Figure 12-2. Basic hydraulic system. Figure ... Open center hydraulic system. Several types of selector valves are used in conjunction with the open center system. One type is both manually engaged and manually disengaged. First, the valve is manually moved to an operating position. Then, the actuating…
Aviation Maintenance Technician Handbook - Airframe p. 12-4
Chapter 12: Hydraulic & Pneumatic Power Systems › Hydraulic Fluid Contamination › Contamination Check
should be drained and replaced, with samples taken before and after the maintenance procedure. Sampling Procedure • Pressurize and operate hydraulic system for 10 to 15 minutes. During this period, operate various flight controls to activate valves and thoroughly mix hydraulic…
Aviation Maintenance Technician Handbook - Airframe p. 12-1
Chapter 12: Hydraulic & Pneumatic Power Systems › Hydraulic Fluid › Chemical Stability
system operates for a considerable period of time at high temperatures. Excessive temperatures have a great effect on the life of a liquid. It should be noted that the temperature of the liquid in the reservoir of an operating hydraulic ... system does not always represent a true state of operating conditions. Localized hot spots occur on bearings, gear teeth, or at the point where liquid under pressure is forced through a small orifice. Continuous passage of a liquid through these…