mechanically operated shutoff valve provides
hydraulic pressure to the system only when
the nose gear is down and locked.
Master cylinders operated by the tops of the
rudder pedals provide controlling pressure to
actuate brake control valves for normal or
emergency operation of the brakes. Selection
of normal, emergency, or parking brakes is
made with the wheel brake lever in the cock-
pit. Antiskid braking is available only during
normal braking.
LANDING GEAR
MAIN GEAR
The main gear (Figures 14-1 and 14-2) in-
cludes a shock strut (oleo-pneumatic leg),
torque link, hydraulic gear actuator (jack),
side stay, wheels and brake assemblies, in-
board door, and outboard door (fairing). Each
wheel contains fusible plugs that release air
from the tire in the event of excessive pressure
buildup due to heat. The side stay is the rigid
component of the assembly when the gear is
extended or retracted. The gear is attached to
the wing structure at the trunnion points. The
outboard door is mechanically actuated by
gear movement; the inboard door is hydrauli-
cally actuated and is closed with the gear ex-
tended or retracted. The maximum permissible
airspeed for extending or retracting the land-
ing gear and with the gear extended is 220
knots IAS.
NOSE GEAR
The nose gear (Figures 14-3 and 14-4) in-
cludes a shock strut, torque link, hydraulic
gear actuator (jack), drag brace, and the nec-
essary mechanical linkage for opening and
closing the three gear doors.
The drag brace is the stabilizing component
when the gear is extended. Gear actuation and
door movement are accomplished with one
hydraulic actuator. The gear is self-centering
when the shock strut is fully extended. The
steering disconnect pin must be installed prior
to taxiing.
All three nose gear doors are mechanically ac-
tuated by gear movement. The forward doors
are closed with the gear extended or retracted;
the aft door remains open with the gear ex-
tended. The forward doors can be manually
14-2
FOR TRAINING PURPOSES ONLY
HAWKER 800 XP
PILOT TRAINING MANUAL
FlightSafety
international
SHOCK
STRUT
OUTBOARD
DOOR
SIDE
STAY
INBOARD
DOOR
DOWNLOCK
PIN
GEAR
ACTUATOR
Figure 14-1. Main Landing Gear
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