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See the antiskid/autobrake system section for more information
about the antiskid system. (SECTION 32-42)
LANDING GEAR CONTROL SYSTEM - LEVER ASSEMBLY
EFFECTIVITY
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Training Information Point
If the lever lock solenoid fails in the locked position, you can
move the landing gear control lever to the up position with the
lever lock override trigger. The trigger retracts the forward part
of the control lever so it clears the lever lock mechanism.
LANDING GEAR CONTROL SYSTEM - LEVER ASSEMBLY
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-31-00-002
LANDING GEAR CONTROL SYSTEM - LEVER ASSEMBLY
LANDING GEAR CONTROL SYSTEM - LEVER ASSEMBLY
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-31-00-002
Purpose
The forward quadrant of the landing gear control system moves
the landing gear selector valve through control cables.
Location
The forward quadrant is on the aft side of the forward pressure
bulkhead in the forward equipment compartment. The forward
equipment compartment access door gives access to the
forward quadrant.
Physical Description
The forward quadrant has these components:
* Push-pull cable
* Push-pull gearbox
* Forward quadrant.
Functional Description
When the landing gear lever moves, the push-pull cable moves.
The push-pull cable moves the forward quadrant through the
push-pull gear box. When the forward quadrant moves, the
control cables to the landing gear selector valve move.
LANDING GEAR CONTROL SYSTEM - FORWARD QUADRANT
EFFECTIVITY
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LANDING GEAR CONTROL SYSTEM - FORWARD QUADRANT
LANDING GEAR CONTROL SYSTEM - FORWARD QUADRANT
EFFECTIVITY
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32-31-00-003
Purpose
The landing gear selector valve directs hydraulic pressure from
the transfer valve to extend and retract the main landing gear
and the nose landing gear.
Location
The selector valve is on the ceiling in the main landing gear
wheel well.
Physical Description
The landing gear selector valve is a three-position valve and
has these components:
* Slide valve
* Manual extend solenoid valve
* Bypass valve.
Functional Description
The landing gear control lever controls the position of the
selector valve through control cables to a control rod that is
connected to the selector valve.
The manual extension system supplies electrical signals to a
solenoid valve in the selector valve. The solenoid valve controls
hydraulic pressure to a pressure operated bypass valve. When
the bypass valve is in the bypass position, landing gear up
pressure is ported around the slide valve to return. This
prevents a hydraulic lock in the landing gear system if the slide
valve jams.
LANDING GEAR CONTROL SYSTEM - SELECTOR VALVE
EFFECTIVITY
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LANDING GEAR CONTROL SYSTEM - SELECTOR VALVE
LANDING GEAR CONTROL SYSTEM - SELECTOR VALVE
EFFECTIVITY
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32-31-00-005
Purpose
The landing gear transfer valve changes the pressure supply
for landing gear retraction from hydraulic system A to hydraulic
system B.
Location
The landing gear transfer valve is in the main landing gear
wheel well on the forward end of the keel beam.
Physical Description
The transfer valve is a two-position, hydraulic or solenoid
operated valve and has these components:
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