747-400
MAINTENANCE MANUAL
AFT OUTBOARD
BRAKE LINE
FORWARD OUTBOARD
BRAKE LINE TRUCK POSITIONER LINE
FORWARD INBOARD
BRAKE LINE BODY GEAR
STEER EXTEND
OUTBD
AFT INBOARD
BRAKE LINE
BODY GEAR STEER
RETRACT LINE
PLACARD
STA 1460
BRACKET
STEER EXTEND
OUTBD
(FROM 1460
BRACKET)
STEER EXT INBD (FROM 1480 BLKHD)
HYDRAULIC LINE SUPPORT ASSEMBLY BRACKET
BODY GEAR STEER
FWD RETRACT LINE
Body Landing Gear Hydraulic Line Identification
Figure 403 (Sheet 3)
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747-400
MAINTENANCE MANUAL
(b)
Disconnect the landing gear wire bundle from the panel in the connection box.
(c)
Disconnect the electrical conduit from the connection box and conduit clamp. 1) Tie the conduit end to the side brace.
S 864-012
(3)
Provide electrical power, if required (AMM 24-22-00/201).
S 034-013
(4)
Disconnect the hydraulic hoses at the outboard end of the trunnion.
NOTE: Tie the hoses to the structure to avoid interference with
____
gear removal.
S 034-063
(5)
Cap the lines and plug the fittings (Fig. 403).
S 034-014
(6)
Disconnect the shock strut inboard door strut from the landing gear (AMM 32-14-05/401).
NOTE: Secure the shock strut inboard door strut to the airplane
____
structure to keep away from the gear.
S 034-015
(7) Disconnect the shock strut outboard door strut from the landing gear (AMM 32-14-06/401).
NOTE: Both the inboard and outboard doors can be removed to
____
facilitate the body gear removal.
NOTE: Tie the shock strut outboard door strut to the structure to
____
provide clearance.
S 034-016
WARNING:_______THE ACTUATOR WEIGHS APPROXIMATELY 136 POUNDS. MAKE SURE THE ACTUATOR IS ADEQUATELY RESTRAINED TO AVOID INJURY TO PERSONNEL AND DAMAGE TO PARTS.
(8) Disconnect the lower end of the retract actuator from the shock strut (AMM 32-33-01/401).
NOTE: Compress the actuator rod and tie it securely with the sling
____
to avoid its interference with the gear removal.
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747-400 MAINTENANCE MANUAL
S 494-017
(9)
Install the bungee restraining tool on the downlock bungee. S 034-018
(10)
Disconnect the drag strut universal from the shock strut (AMM 32-13-07/201).
WARNING:_______ THE DRAG STRUT COMPONENT ASSEMBLY WEIGHS APPROXIMATELY 330
POUNDS. THE BUNGEE IS SPRING LOADED. MAKE THE SURE PARTS ARE
ADEQUATELY SUPPORTED BEFORE REMOVING THE BOLT OR INJURY TO
PERSONNEL OR DAMAGE TO EQUIPMENT MAY RESULT.
NOTE: Tie the drag strut assembly and universal to the airplane
____ structure to avoid their interference with gear removal.
S 014-020
(11)
Remove the keel beam access panel (193U) under the inboard trunnion support assembly.
S 024-021
(12)
Remove the body landing gear (24) (Fig. 402).
(a)
Remove the four bolts (9) which hold the inboard trunnion bearing cap (7), thus allowing the removal of the cap, lower bushing half (10) and bearing retention key (6).
NOTE: Note the position of the cap, bushings and retention key
____ to facilitate their reinstallation.
(b)
Hold the nut (2) with the special tool if it is necessary.
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