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B - Depressurization of related hydraulic
circuit
C - Hydraulic system depressurization
What is the purpose of the pressure relief valve?
A - To relieve hydraulic pressure to the
return manifold
B - To relieve excessive air pressure to the
atmosphere
C - To provide overpressure warning to the
ECAM
TMUHYDE05 LEVEL 3
EFFECTIVITY 29-14-00 Page 5
Apr 30/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 29 HYDRAULIC POWER
UF94200
EFFECTIVITY Page 73
ALL
THIS PAGE INTENTIONALLY LEFT BLANK
TMUHYDE05 LEVEL 3
EFFECTIVITY 29-14-00 Page 6
Apr 30/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 29 HYDRAULIC POWER
UF94200
EFFECTIVITY Page 74
ALL
29 - HYDRAULIC POWER
29-16-00 HYDRAULIC RESERVOIR FILLING
PRESENTATION
CONTENTS:
Coupling Socket
Restrictor
Hand Pump
Filter
Reservoir Filling Selector Valve
Reservoir Quantity Indicator
Check Valve
Self Examination
TMUHYDF01 LEVEL 2
EFFECTIVITY 29-16-00 Page 1
Jul 31/97
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 29 HYDRAULIC POWER
UF94200
EFFECTIVITY Page 75
ALL
HYDRAULIC RESERVOIR FILLING PRESENTATION
COUPLING SOCKET
The coupling socket is used to fill the reservoir from
a pressurized ground hydraulic supply.
The coupling socket includes a check valve.
RESTRICTOR
A restrictor located between the coupling socket and
the reservoir filling selector valve protects the
system against over pressure.
HAND PUMP
The hand pump is used to refill the reservoirs if no
ground cart is available.
The hand pump lever is on the yellow ground service
panel. A specific filling valve including a filter and
a check valve is installed on the hand pump.
FILTER
The filter of the reservoir filling system is equipped
with a clogging indicator.
Note: No bypass possibility on this filter.
RESERVOIR FILLING SELECTOR VALVE
The reservoir filling selector valve directs the
hydraulic fluid from the supply source to the reservoir
of the selected system. Do not depressurize the
hydraulic reservoir to refill it.
In the NEUTRAL position, an internal thermal relief
valve protects the selector valve from thermal
expansion of the fluid.
RESERVOIR QUANTITY INDICATOR
A reservoir quantity indicator allows refilling
monitoring. It shows the contents of the selected
hydraulic reservoir which is indicated by one of the
three colored lights.
The direct reading gauges are used if no electrical
power supply is available.
CHECK VALVE
The hydraulic fluid is sent to the reservoirs via a
check valve and the filter of the low-pressure return
circuit.
The check valves isolate the main hydraulic systems
from the reservoir filling system when it is not in
use.
TMUHYDF01-T01 LEVEL 2
EFFECTIVITY 29-16-00 Page 2
Jul 31/97
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 29 HYDRAULIC POWER
UF94200
EFFECTIVITY Page 76
ALL
HYDRAULIC RESERVOIR FILLING PRESENTATION
TMUHYDF01-P01 LEVEL 2
EFFECTIVITY 29-16-00 Page 3
Jul 31/97
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 29 HYDRAULIC POWER
UF94200
EFFECTIVITY Page 77
ALL
SELF EXAMINATION
Do the hydraulic reservoirs have to be
depressurized to refill with hydraulic fluid?
A - Yes
B - No
What is the main function of the restrictor?
A - to limit the pressure from the hand pump.
B - to protect the system against
overpressure.
C - to limit thermal expansion of the
hydraulic fluid
What happens when the filter of the filling circuit
is clogged?
A - the fluid bypasses the filter element.
B - the fluid is stopped; filling is
impossible.
C - the filling pressure has to be increased.
TMUHYDF01 LEVEL 2
EFFECTIVITY 29-16-00 Page 4
Jul 31/97
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 29 HYDRAULIC POWER
UF94200
EFFECTIVITY Page 78
ALL
29 - HYDRAULIC POWER
29-17-00 SEAL DRAIN SYSTEM PRESENTATION
CONTENTS:
General
Forward system
Aft system
Tank drainage
TMUHYAA02 LEVEL 2
EFFECTIVITY 29-17-00 Page 1
Apr 30/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 29 HYDRAULIC POWER
UF94200
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