-17 Ch 2 Hydraulics Introduction Flashcards
What are the types of symbols commonly used in drawing circuit diagrams for fluid power systems?
Pictorial, Cutaway, and Graphic
The symbols used to depict system configurations are used from?
SAE AS1290 and USA Standard Graphic Symbols for Fluid Power Diagrams (USAS Y32.10-1967) and publisher American Society of Mechanical Engineers United Engineering Center
-17 manual is used for maintenance instructions related to hydraulic systems utilizing what kinds of hydraulic fluids?
MIL-PRF-5606, MIL-PRF-83282, MIL-PRF-87257
A service operation in which entrapped air is allowed to escape from the closed hydraulic system.
Air Bleeding
A device used to prevent pressure and friction from extruding the O-Ring packing through the clearance gap of a seal.
Backup Ring
A localized gaseous condition within a liquid stream which occurs where the pressure is reduced to the vapor pressure
Cavitation
A level of contamination which exceeds Class 6 of Navy Standard or SAE AS4059 Class 9 and is considered abnormally high as a result of amount or size of the contaminants present.
Contamination, Gross
To removed free, entrained, or dissolved gas from a fluid filled system.
De-aerate
An enclosed workspace, room, or facility in which humidity and filtered inlet air are controlled.
Controlled Environment Work Center
A filter element which is intended to be discarded and replaced after one service cycle
Disposable Filter (Throw Away)
A decontamination process in which original aircraft fluid is removed to the maximum extent practical, and then discarded. The draining operation is generally, but not necessarily, performed with the system connected to a clean external hydraulic power source and new replacement fluid is added as required.
Flushing
The component of the seal which forms the cavity or inclusion which surrounds and supports the packing and controls the squeeze.
Gland
Halogen
Any of the 5 chemical elements; fluorine, chlorine, bromine, iodine, astatine
HEPA Filter
High Efficiency Particulate Air Filter. An efficient filter usually constructed from the fine fiber pleated papers, intended for the removal of particulate matter from air. Widely used in clean rooms and clean work stations.
Differential Pressure Indicator
An indicator which signals the difference in pressure at two points. A feature often included in filter assemblies to monitor the pressure drop across the filter element and thereby indicate element losing and the need for replacement.
K-B (kauri- Butanol)
A test method to measure solvent effectiveness
Laminar Flow
A flow situation in which fluid (or gas) moves in parallel layers
Laminar Flow Work Station
A contamination contrólele workbench used to ensure a high degree of cleanliness about a component.
Loaded Filter (clogged)
A filter element that has collected a quantity of contaminants such that it can no longer pass fluid at rated flow without excessive differential pressure or by-pass.
Manifold
An assembly which serves as a fluid conductor having multiple connection ports
Micron
Unit of measurement one millionth of a meter long, or approximately 0.00003937 inch expressed in English units.
NAVAIR, Naval Air Systems Command
The Navy headquarters activity having overall responsibility for the acquisition and support of aeronautical weapons systems and related material.
Oxidation Inhibitor
An additive to the base fluid intended to minimize fluid oxidation and the generation of oxidation byproducts.
Packing
The component of a seal which serves as a sealing medium by nature of its plastic or elastic properties, or it’s ability to deform into the shape of the gland.
Particulate Contamination Standards
Standard used to quantitatively grade levels of particulate contamination. The Navy standard defines seven class levels of particulates (0-6) and the SAE AS4059 standard defines fourteen class levels of particles in 100 ml of sampled fluid
Phosphate Ester
Clear, light purple, fire resistant hydraulic fluids conforming to SAE AS1241
Operating Pressure
The pressure at which the system is operated
Proof Pressure
The nondestructive test pressure, in excess of the maximum rated operating pressure, which causes no permanent deformation, excessive external leakage, or other malfunction
Purging
A Decontamination process in which the aircraft system is drained to the maximum extent practical and the removed fluid discarded. A suitable cleaning agent is the. Introduced into the system and circulated as effectively as possible to remove gross contaminants. The operation is completed by removing the circulated cleaning agent and replacing it with new working fluid. Purging is usually followed by a period of recirculating cleaning to ensure adequate decontamination. System purging is limited to use by depot level maintenance activities
Purifying
A decontamination process using equipment capable of removing particles, air, water, and some solvents from hydraulic fluid
Recirculation Cleaning
A decontamination process in which the aircraft systems are powered from a clean external source and cycled so as to produce maximum displacement of fluids.
Decontamination is accomplished by circulating the original aircraft fluid through the aircraft fluid through the aircraft and GSE filters, replacing or cleaning these filters as required throughout the cleaning operation.
Seal
A device to retain fluid within a hydraulic component. The seal may consist of two or more components, such as a packing in a gland, and a packing and backup ring in a gland.
Skydrol and Hyjet
Trade names for phosphate ester fluids defined by SAE AS1241
TFE
A tetrafluoroethylene resin.
Threshold Limit Values (TLV)
A guide used to define recommended safety limits for personnel exposed to toxic vapors. limits are expressed as maximum parts vapor (tolerable) per million parts of air.
Viscosity
A measure of the internal friction or the resistance of fluid to flow.
Fluid Connectors
Joining Lines
Reservoir
Quick Disconnect without Checks
Line, with Fixed Restriction
Lines, Crossing
Accumulator
Accumulator, Spring Loaded
Accumulator differences
Desiccator (Chemical Dryer)
Single Acting cylinders (hydraulic & pneumatic)
Double Acting Single End Rod
Double End Rod cylinder
Actuators and Controls,
Top is spring
Bottom is Manual
Pumps
Review image
2 Way Valves (2 ported Valves)
Valves
Review image
Review image
Pressure control Valves
Flow Control Valves
MIL-PRF-5606
Hydraulic Fluid, NATO No. H-515, Aircraft, Missile, and Ordnance
MIL-PRF-83282, NATO No. H-537
Hydraulic Fluid, Fire Resistant
MIL-PRF-87257 NATO H-538
Hydraulic Fluid, Low Temperature, Synthetic Hydrocarbon Aircraft and Missle
SAE AS1241
Hydraulic Fluid, Phosphate Ester
MIL-G-21164
Grease, molybdenum disulfide
For Low and High Temperatures
Sliding steel on steel, heavily loaded hinges; rolling element bearings where required.
MIL-PRF-81322, NATO No. G-395
Grease, Aircraft General Purpose Wide Temp. Range
O-rings, certain splines, ball and roller bearing assemblies, primarily wheel brake assemblies and in applications where compatibility with rubber is required.
MIL-PRF-32014
Grease, Aircraft General Purpose Wide Temp Range
O-rings, bushings, ball and roller bearing assemblies, certain splines, areas subject to corrosion (like landing gear)
A-A-59323, Type II
Wiping Cloth, Lint- Free
NAVAIR 17-15BF-97
Operation instructions Hydraulic Particle Counter Test
NAVAIR 17-600-BF110–6-1
Diesel Hydraulic Power Supply A/M27T-15
6-2 is Periodic Maintenance Requirements Manual for T-15
NAVAIR 19-1-96
Operation and Organizational Maintenance with Illustrated Parts Breakdown Fluid Servicing Unit Hydraulic Fluid and Bulk dispensing unit model PMU-71/E
NAVAIR 19-600-441-6-1
Pre-operational Checklist Fluid Servicing Unit Hydraulic Fluid Model PMU-71/E
6-2 is PMIC for PMU-71/E
