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reservoir.
HYDRAULIC POWER - OPERATION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
29-00-00-004
HYDRAULIC POWER - OPERATION
HYDRAULIC POWER - OPERATION
EFFECTIVITY
GUN 001-005, 201-999 PRE SB 737-27-1253 29-00-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
29-00-00-004
HYDRAULIC POWER - OPERATION
HYDRAULIC POWER - OPERATION
EFFECTIVITY
GUN 006-099, 101-115; GUN 001-005, 201-999 POST SB 737-27-1253 29-00-00
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
29-00-00-004
General
Two independent hydraulic systems supply power to airplane
systems. The standby hydraulic system supplies an alternative
source of power.
Hydraulic Reservoir Pressurization System
The hydraulic reservoir pressurization system supplies air from
the pneumatic system to the reservoir. This pressurizes the
supply hydraulic fluid for the pumps.
Hydraulic System A
The pressure sources for hydraulic system A are an enginedriven
pump (EDP) on engine 1 and an electric motor-driven
pump (EMDP) in the main wheel well. Both pumps supply
pressure to these airplane systems:
* Left thrust reverser
* Landing gear extension and retraction
* Nose wheel steering
* Alternate brakes
* Primary flight controls
* Flight spoilers (4)
* Ground spoilers (4).
Hydraulic System B
The pressure sources for hydraulic system B are an enginedriven
pump (EDP) on engine 2 and an electric motor-driven
pump (EMDP) in the main wheel well. Both pumps supply
pressure to these airplane systems:
* Right thrust reverser
* Normal brakes
* Primary flight controls
* Flight spoilers (4)
* Trailing edge flaps
* Leading edge flaps and slats.
System B supplies an alternative hydraulic power source for
landing gear retraction and nose wheel steering.
Ground Servicing System
The ground servicing system fills all hydraulic reservoirs from
one central location.
Standby Hydraulic System
The pressure source for the standby hydraulic system is an
electrical motor-driven pump (EMDP). The standby hydraulic
system operates as an alternate system to supply hydraulic
power for these systems:
* Thrust reversers
* Rudder
* Leading edge flaps and slats.
HYDRAULIC POWER - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
29-00-00-006
You operate the standby system manually with the FLT
CONTROL switches or the ALTERNATE FLAPS arm switch.
The standby system operates automatically if all of these
conditions are true:
* One FLT CONTROL switch to ON
* Trailing edge flaps not up
* Airplane in the air or wheel speed more than 60 knots
* Low flight control pressure.
Hydraulic Power Transfer Unit (PTU) System
The hydraulic power transfer unit (PTU) system is a hydraulic
motor pump assembly that supplies an alternative source of
power for the leading edge flaps and slats. The PTU system
operates automatically when these conditions occur:
* Airplane in the air
* Trailing edge flap position between up and 15
* System B EDP low pressure.
Hydraulic Indicating System
The hydraulic indicating system shows these indications in the
flight compartment:
* System A and B reservoir quantity
* Standby reservoir low quantity
* System A and B pressure
* System A and B engine-driven pump (EDP) low pressure
* System A and B electric motor-driven pump (EMDP) low
pressure
* Standby electric motor-driven pump low pressure
* System A and B electric motor-driven pump (EMDP)
overheat.
HYDRAULIC POWER - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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D633A101-GUN Jun 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
29-00-00-006
HYDRAULIC POWER - FUNCTIONAL DESCRIPTION
HYDRAULIC POWER - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
　
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