747-400 AMM 飞机维护手册 起落架 LANDING GEAR 4(110)

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Body Gear Sequence Valves (Fig. 4)
_________________________
 A.  Sequence valves positioned by the movement of the body gear wheel well doors, the gear and gear locks ensure that the doors open and close and that the gear retracts and extends in the correct sequence. The valves are of the slide and sleeve type.
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MAINTENANCE MANUAL

SEE A
GEAR ACTUATOR
KEEL BEAM  UPPER JURY STRUT JURY STRUT SPINDLE  DOWNLOCK BUNGEE  TRUNNION 
DRAG STRUT 
SPINDLE  LOWER 
JURY 
STRUT  SWIVEL FITTING 

OUTER CYLINDER 
UPPER 
DRAG STRUT  GROUND 
DOWNLOCK  LOCKPIN  SIDE 
ACTUATOR  HOLE  LOWER  BRACE 
DRAG 
STRUT 
UPLOCK 
ROLLER 
DRAG STRUT 
UNIVERSAL 
FWD 
A 

Body Gear Extension Components Location
Figure 1

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MAINTENANCE MANUAL

Body Gear Door Extension Component Location
Figure 2 (Sheet 1)

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MAINTENANCE MANUAL

SIDE 
STRUT 
SEE  C 
SIDE 
STRUT  DOOR 
DRAG BRACE  ATTACH 
DOOR ATTACH  ROD 
ROD 
FWD  C 
BODY GEAR 
INBOARD DOOR 
B 

FWD
SHOCK STRUT
SHOCK STRUTBODY GEAR ATTACH ROD
OUTBOARD AFT DOOR
D
Body Gear Door Extension Component Location
Figure 2 (Sheet 2)

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MAINTENANCE MANUAL

HEAD END ASSEMBLY
OUTER CYLINDER 
TUBE ASSEMBLY 
RETRACT 
SNUBBER 
ASSEMBLY 
EXTEND SNUBBER 
MECHANISM 

FEED TUBE 
PISTON ROD 
ROD END ASSEMBLY 

Body Gear Actuator
Figure 3

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MAINTENANCE MANUAL

SPOOL AND SLEEVE ASSEMBLY
VALVE BODY
RETAINER
BOLT RETAINER
SCRAPER
CAP VALVE CHECK SPOOL
DOOR OPERATED SEQUENCE VALVE
O-RING AND
BACKUP RINGS
(TYPICAL)
RETAINER
STOP SPRING
BUSHING
SEAL RETAINER
SLIDE AND SLEEVE
END CAP BODY
CHECK VALVE CAVITYGLAND
UPLOCK OPERATED SEQUENCE VALVE
O-RING AND 
BACKUP RINGS  CHECK VALVE  SPRING 
SCRAPER  (TYPICAL)  CAVITY  END CAP 

NUT
CLEVIS
STOP GLAND SLIDE AND SLEEVE
BODY
ASSEMBLY DOWNLOCK OPERATED SEQUENCE VALVE Body Gear Sequence Valves SchematicFigure 4
　
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