T-45A UJPT, E2-C2, ADV, & IUT Eng-09
Hydraulic System
PRESENTATION
Sg 1, fr 1
I.
T-45A hydraulic system overview
Lesson Organization
Sg 1, fr 2 (3 overlays)
A.
T-45A has two independent hydraulic systems:
Simplified Hydraulic System Block
HYD 1 and HYD 2. Each system contains its
Diagram
own reservoir and is pressurized by its own
Overlay 1
engine-driven pump (EDP).
HYD 1 System
1.
HYD 1 provides hydraulic pressure to
power the flight controls (ailerons and
stabilator) and the general services.
Overlay 2
2.
HYD 2 provides hydraulic pressure to
HYD 2 System
power only the flight controls.
Overlay 3
RAT
3.
Maximum normal operating pressure for
each system is 3000 PSI
Wall Chart: Cutaway View T-45A
Wall Chart: T-45A Cockpit
4.
A safety relief valve will open in each
system at 3600 +/-50 PSI to present
ruptured seal in the event of over
Sg 1, fr 3
B.
An automatically deployed ram air turbine (RAT)
Hydraulic System Pressure
Gauges/Reset Button
provides emergency hydraulic system pressure
which, in case of a failure of HYD 2 EDP,
provides pressure to the flight controls. The
emergency system is integral to the HYD 2
system.
C.
Hydraulic system controls and indicators
Sg 1, fr 4
1.
Cockpit controls and indicators
GTSFIRE
EGT/RPM
CABNA T
I L
a.
HYD 1, HYD 2, and BRAKE pressure
OILPRESS
OXYG N
E
HYDFAIL
G NERATOR
E
gauges
BRAKEPRESS
SEATUNARM D
E
CA OPY
N
TAILPIPEHOT
SLATS
HYD1PRESS
ACINVERTER
HYD2PRESS
EC
A
b.
HYD 2 RESET button
RATEXTEN
D
AVIONICSHOT
FUELLO
W
PARKBRAKE
LPPUM
P
NOSEWHLSTR
FUELPR SS
E
CONTRAUG
c.
Warning caution panel (WCP)
ACCEL
ANTI-SKID
WARNING/CAUTION LIGHT PANEL
(1) HYD FAIL warning light
(8-03) Original
Page 9-3
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