Hydraulic Subsystems
T-45A UJPT, E2-C2, ADV, & IUT Eng-13
Sg 1, fr 1
PRESENTATION
Lesson Organization
I.
Landing gear system 1.5.4.1.1.1, 1.5.4.1.1.1.1
A.
Major components
1.
Main landing gear (MLG)
Sg 1, fr 2
a.
Shock strut: mechanically connects
Retract/
Extend
Actuator
Retract/
shock absorbing piston tube, side
Extend
Lock
Actuator
Link
Lock
Link
brace, retraction actuator, and trailing
Side Brace
arm
Piston Tube Oleo
Shock Strut
Trailing Arm
b.
Piston tube (also known as an oleo):
VIEW
VIEW
LOOKING
LOOKING
AFT(RMLG)
OUTBOARD(RMLG)
shock absorber to cushion force of
MAIN LANDING GEAR (MLG) MAJOR
landing
COMPONENTS
NOTE: Approximately 2.2 to 2.5
inches of exposed chrome required for
normal wheel strut (aircraft at dry
weight); 7/8 to 1 7/8 inches with full
fuel.
c.
Trailing arm
(1) Mount for axle, wheel, and brake
unit
(2) Connects to shock absorber piston
tube to absorb shock loads from
landing
d.
Retract/extend actuator: retracts and
extends main gear
e.
Side brace
(1) Provides lateral support for MLG
(2) Serves as mount for lock link
device
Page 13-4
(8-03) Original
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