Body Gear Components
Figure 1
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MAINTENANCE MANUAL
SEE B
SEE D
SEE C SEE A
FITTING SUPPORT BEAM KEEL
DOOR FORWARD BODY GEAR
SPINDLE
FITTING ATTACH BRACE DRAG
C
SUPPORT BEAM TRUNNION
B FWD FITTING ATTACH TRUNNION BODY GEAR SIDE BRACE FITTING TRUNNION A UPPER STRUT JURY BRACE SPINDLE SHOCK STRUT BODY GEAR FWD
D DOOR SHOCK STRUT BODY GEAR
Body Gear Attachments
Figure 2
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SHOCK STRUT CHARGING VALVE
RESTRICTOR TUBE
ORIFICE
DRAG STRUT UNIVERSAL ATTACH LUG
OUTER
CYLINDER
ROLLER ATTACH ARM LUGS
SEE B
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747-400
MAINTENANCE MANUAL
RETAINER PLATE
ATTACHMENT TRUNNION
PIN METERING
ACTUATOR BOSS
RESTRICTOR
STEERING ATTACHMENT
FOLLOWER
METERING PIN ANCHOR TUBE
SEE A
INNER CYLINDER
SHUTOFF VALVE FLOW FUSE OUTER CYLINDER
GAGE ASSEMBLY STRUT CLAMP EXTENSION INDICATOR PRESSURE GAGE ASSEMBLY
A OIL CHARGING CHECK VALVE
Body Gear Shock Strut Figure 3 (Sheet 1)
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MAINTENANCE MANUAL
ACTIVE DYNAMIC SEAL
INNER CYLINDER
ACTIVE STATIC SEAL LOWER BEARINGLOWER BEARING
SPARE DYNAMIC SEALS SPARE STATIC BACKUPOUTER RINGS
CYLINDER SEAL
INNER CARRIER
CYLINDER SCRAPER
LOWER RING
BEARING FOLLOWER
OUTER
CYLINDER
SPARE STATIC
SEAL
SPARE DYNAMIC SEAL
SPARE STATIC
SEAL
SEAL CARRIER
PIN
ACTIVE STATIC SEAL
BACKUP RINGS
ACTIVE DYNAMIC SEAL
GLAND NUT
SHOCK STRUT LOWER BEARING/SEAL CARRIER SHOCK STRUT LOWER BEARING/SEAL CARRIER (ONE-PIECE LOWER BEARING) (TWO-PIECE LOWER BEARING)
Body Gear Shock Strut
Figure 3 (Sheet 2)
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A. The body gear shock strut is the primary supporting member of the body landing gear. The shock strut is made of steel and consists of an inner cylinder, an outer cylinder, an orifice support tube and a metering pin. The orifice support tube is attached to the top of the outer cylinder. A snubber valve located below the upper bearing provides control of shock strut rebound. The lower bearing contains two T-ring seals, one each in contact with the inner and outer cylinders. Two sets of spare seals also are contained in annular grooves in the lower bearing. These spare seals can be used to replace active seals without removing the inner cylinder. The shock strut is attached to airplane structure by the trunnion. The shock strut is held in position by the drag strut and the side brace.
B. The outer cylinder is a single piece forging, bored to receive the inner cylinder. The upper portion provides a full shock strut width lug attachment for the trunnion on the aft side of the cylinder. Lugs on the center portion provide attachment points for the side brace, upper torsion links, and the drag strut universal attachment.
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本文链接地址：747-400 AMM 飞机维护手册 起落架 LANDING GEAR 2(117)
