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toilet waste to the waste tank.
GUN 001-012, 201-999; VACUUM BLOWERS WITH FILTERS
The filter removes particles from the air used to cool the
vacuum blower during operation.
GUN ALL
Three thermal switches give overheat protection. The switches
are wired in series and operate at 270F (132C). If a switch
operates, it stops motor operation. The switches reset when the
temperature decreases to less than their set point.
Operation
The vacuum blower operates when you push the flush switch
and the airplane is below 16,000 feet.
WATER/WASTE - VACUUM WASTE SYSTEM - VACUUM BLOWER AND FILTER
EFFECTIVITY
GUN ALL 38-32-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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Training Information Point
The vacuum blower has two flexible coupling hoses that attach
with clamps. Four fasteners on shock mounts and a jumper
cable attach the blower to the shelf.
GUN 001-012, 201-999; VACUUM BLOWERS WITH FILTERS
There are four packings that hold the filter to the vacuum
blower.
GUN 001-012, 201-999
NOTE: There are two possible vacuum blowers. The old
configuration vacuum blower, PN 606802-2, has a filter.
The replacement vacuum blower, PN 645172–1, does
not have a filter. The vacuum blower without a filter is
fully interchangeable with the vacuum blower with a
filter.
You can clean the filter. Use an air source and blow the air
through the filter in the opposite direction of the usual flow.
GUN ALL
WATER/WASTE - VACUUM WASTE SYSTEM - VACUUM BLOWER AND FILTER
EFFECTIVITY
GUN ALL 38-32-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
38-32-00-010
WATER/WASTE - VACUUM WASTE SYSTEM - VACUUM BLOWER AND FILTER
WATER/WASTE - VACUUM WASTE SYSTEM - VACUUM BLOWER AND FILTER
EFFECTIVITY
GUN 001-012, 201-999; VACUUM BLOWERS WITH FILTERS 38-32-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
38-32-00-010
WATER/WASTE - VACUUM WASTE SYSTEM - VACUUM BLOWER
WATER/WASTE - VACUUM WASTE SYSTEM - VACUUM BLOWER AND FILTER
EFFECTIVITY
GUN 013-099, 101-118; VACUUM BLOWERS WITHOUT FILTERS 38-32-00
Page 24
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
38-32-00-010
THIS PAGE IS INTENTIONALLY LEFT BLANK
WATER/WASTE - VACUUM WASTE SYSTEM - VACUUM BLOWER AND FILTER
38-32-00
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
The vacuum blower barometric switch opens when the altitude
is above 16,000 feet. The open switch does not let the vacuum
blower come on.
Location
The vacuum blower barometric switch is in the jackscrew
compartment. You get access to it through the section 48 access
and blowout door.
The barometric switch attaches to structure on the left side of
the fuselage.
Physical Description
The barometric switch has an aneroid capsule and an electrical
connector.
Functional Description
The capsule senses the ambient air pressure. As the pressure
outside decreases, the capsule expands. When the capsule
expands to a specific size, it opens an internal switch.
Interfaces
The vacuum blower barometric switch is part of the control
circuit for vacuum blower operation.
WATER/WASTE - VACUUM WASTE SYSTEM - VACUUM BLOWER BAROMETRIC SWITCH
EFFECTIVITY
GUN ALL 38-32-00
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WATER/WASTE - VACUUM WASTE SYSTEM - VACUUM BLOWER BAROMETRIC SWITCH
WATER/WASTE - VACUUM WASTE SYSTEM - VACUUM BLOWER BAROMETRIC SWITCH
EFFECTIVITY
GUN ALL 38-32-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
38-32-00-017
Power
Transfer bus 1 supplies 115v ac three-phase power for vacuum
blower operation.
The control power is 28v dc from bus 1.
Functional Description
The vacuum blower operates when the airplane is below 16,000
　
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