T-45A UJPT, E2-C2, ADV & IUT Eng-13
Hydraulic Subsystems
2.
Controls and indicators 1.4.10.3, 1.4.11.3
a.
Brake pedals
(1) Location: top of each rudder
pedal, both cockpits
(2) Purpose: connected to master
cylinder, used to operate brake
control valve which in turn routes
braking pressure to each wheel
brake
NOTE: Brake control valve meters
3,000 psi HYD 1 pressure to each
brake unit in accordance with
brake pedal inputs.
b.
BRAKE pressure gauge
Sg 2, fr 4
(1) Location: left console, both
GTSFIRE
EGT/RPM
CBNAT
AI L
OILPRESS
OYE
XGN
HYDFAIL
cockpits (also starboard wheelwell)
BRAKEPRESS
SEATUNARMED
CNP
AOY
TAILPIPEHOT
SAS
LT
HYD1PRESS
ACINVERTER
HYD2PRESS
EA
C
RATEXTEND
AVIONICSHOT
BRAKE
0
3
(2) Purpose: displays nitrogen
PRESSURE
40
FUELLOW
PARKBRAKE
0
2
CABIN
LEFT
RIGHT
LPPUMP
NOSEWHLSTR
PRESSALT
10
50
X1000
I
I
T W
W
O S
S
O
I
I
T
D
D
0
FUELPRESS
CNRAG
OT U
pressure in wheel brake/
ACCEL
ANTI-SKID
P
B
A
R
K
R
I
2
N
emergency flap accumulator
1
3
A
G
B
0
K
4
R
PSI
X
A
E
1000
K
E
(same as wheel brake/emergency
BRAKE SYSTEM CONTROLS AND
flap accumulator pressure gauge
INDICATORS
in right main wheelwell)
NOTE: The wheel brake/
emergency flap accumulator
maintains hydraulic system
pressure to the brakes and flaps if
HYD 1 fails. It also maintains
pressure to the parking brakes
while the aircraft is on the ground.
The cockpit BRAKE pressure
gauge should read 3,000 psi if
HYD 1 is operational and a
minimum of 1,300 psi if HYD 1 is
shut down. (Really, it should read
2,800 psi after engine shutdown,
(8-03) Original
Page 13-19
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