Hydraulic Subsystems
T-45A UJPT, E2-C2, ADV, & IUT Eng-13
Sg 2, fr 7
HYD 1
PARKING
BRAKE
WHEEL BRAKES
ACCUM INF
P
2
PRESS 1300 lbs/in
A
R
K
86 BARS
I
BRAKE
N
G
MASTER
B
R
20
A
CYLINDERS
K
E
10
30
0 40
3.
Operating characteristics 1.4.10.2.1,
2
ANTI-SKID
ANTI-SKID
1
3
0
4
PSI
X
1000
BRAKE
FLAP
ANTI-SKID
SYSTEM
DE-SPIN
ACTUATOR
O
N
1.4.11.2.1
2
1
3
BRAKE
ANTI-SKID
0
4
PSI
OFF
CONTROL
X000
1
CONTROL
BRAKE
VALVE
BOX
SPEED SENSOR
SPEED SENSOR
ANTI-SKID
ANTI-SKID
O
N
VALVE
OFF
HYD1RETURN
RET
a.
Applying pressure to rudder pedal-
mounted brake pedals controls
WHEEL BRAKE/ANTI-SKID SYSTEM
BLOCK DIAGRAM
operation of brake master cylinders
NOTE: There is a master cylinder for
each brake pedal (two in the front
cockpit and two in the aft cockpit).
NOTE: The pilot with the strongest
toes applies brake pressure.
NOTE: No feedback from brakes
themselves. Feedback is from a
"spring" located in the wheelbrake
master cylinder attached to each brake
pedal.
b.
Hydraulic fluid from master cylinders
controls operation of brake control
valve
NOTE: As a brake pedal is pressed,
the pressure from the master cylinder
opens the brake control valve, allowing
more of HYD 1 (3,000 psi) pressure to
Sg 2, fr 8
be applied to the associated wheel
brake unit.
Wear Pin
Service
not
required
c.
Wheel brake wear indicators
WearPin
A
Service
(1) Parking brake must be set
is
required
A
Wear Pin
A-A
(2) Brake wear indicators (two per
BRAKE UNIT INSPECTION
wheel at the top and bottom of
brake unit) must protrude beyond
recesses in top and bottom of
brake housing
Page 13-24
(8-03) Original
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