T-45A UJPT, E2-C2, ADV, & IUT Eng-09
Hydraulic System
2.
Output distribution: controlled by FC priority
Overlay 2
valve
Power Supply Package (PSP)
Priority Valve
a.
Output of EDP is applied to power
Overlay 3
supply package
FC Priority Valve (PSP) Output
Distribution
b.
FC priority valve normally supplies
hydraulic pressure to both FC services
and general services distribution
c.
Flight control services
Overlay 4
(1) Left and right aileron power control
units (PCUs): tandem hydraulic
cylinders, one side supplied by
HYD 1 and other by HYD 2 (HYD 1
supplies forward side of aileron
PCUs; HYD 2 supplies aft side)
FC SERVICES
(2) Stabilator PCU (also a tandem
PCU)
(3) System redundant with HYD 2
d.
General services
Overlay 5
(1) Landing gear (hydraulic pressure
used for both extension and retrac-
tion)
(2) Nose wheel steering (hydraulic
pressure through the down side of
the normal nose landing gear
GENERAL SERVICES
system)
(3) Launch bar (hydraulic pressure
used for extension only; retraction
is mechanical by spring force)
(4) Speed brake (hydraulic pressure
used for both extension and retrac-
tion)
(8-03) Original
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