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A
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MAINTENANCE MANUAL

WHEEL WELL INBOARD DOOR
WHEEL WELL DOORS

Wing Landing Gear Door Lubrication
Figure 314 (Sheet 1)

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ACTUATOR BEAM ZERK
BMS 3-33 (1 LOCATION)
DOOR ACTUATOR
STRUCTURE ALEMITE
BMS 3-33
(1 LOCATION)
A
A
DOOR ACTUATOR
A
747-400 MAINTENANCE MANUAL
SEE C
ACTUATOR BEAM
BMS 3-33
(3 LOCATIONS)
4 POINTS
B
DOOR ACTUATOR
DIFFERENTIAL OUTPUT ROD
GROUND
RELEASE
CAM
1 POINT
C
1 POINT
A-A
Wing Landing Gear Door Lubrication Figure 314 (Sheet 2)
NUT DIFFERENTIAL OUTPUT ROD FLUSH
BMS 3-33 (1 LOCATION)
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MAINTENANCE MANUAL

LINK 
LINK  7 (2 LOCATIONS) UPPER ROLLER FLUSH BMS 3-33  4  LOWER ROLLERS  SEE  F 
B 
UPPER ROLLER 
SEE  E  LOWER ROLLER 
FWD  OUTBD ZERK FLUSH TRACK  D  5 ZERK FLUSH LINK (2 LOCATIONS) BOARD STRIKE ZERK BMS 3-33  5 POINTS E (TRACK NOT SHOWN) B 4  3 (1 LOCATION) STRIKE BOARD BMS 3-33 
6  6 
UPPER ROLLER 
6  STRIKE BOARD 
ZERK  ZERK 
LOWER ROLLER  FWD 
BMS 11-7 SOLVENT. APPLY AN EVEN COATING

LOWER ROLLERS
(VIEW IN THE INBOARD DIRECTION)
B-B

3 REMOVE ANY RUBBER ACCUMULATION ON THE 5 DOORS MUST BE IN THE CLOSED POSITION
STRIKE BOARD WITH METHYL ETHYL KETONE OR TO ACCESS THE LUBE FITTING.
6 LOOK TO SEE THAT FRESH GREASE FLOWSOF BMS 3-33 ACROSS THE ENTIRE UPPER SURFACE OUT THE END OF ALL JOINT ASSEMBLIES.
OF THE BOARD. 7 APPLY OIL (VIEW C-C) PRIOR TO
4 ONE MORE LUBE POINT IS ON THE
LUBRICATION OF UPPER ROLLER.
OPPOSITE SIDE (NOT SHOWN).
Wing Landing Gear Door Lubrication
Figure 314 (Sheet 3)

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SEE A
UPLOCK MECHANISM
FWD 
TRUNNION 
(2 LOCATIONS) FRAME BMS 3-33 ZERK  1  FRAME ZERK 
SPRING  1  (4 LOCATIONS) BMS 3-33 
BMS 3-23 2 (6 LOCATIONS)  FWD 
2 1  A 12 POINTS OF EACH SPRING. OPPOSITE SIDE (NOT SHOWN). ONE MORE LUBE POINT IS ON THE Wing Gear Uplock Lubrication Figure 315 SPRAY THE ENDS AND LENGTH 

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 S 623-108
 (4)  Apply the Corrosion Inhibiting Compound at each location shown (Fig. 311 through 313).
 NOTE: In areas identified for application of LPS-3 the witness
____ line may not be applied. All witness lines are applied to be easilly seen while performing normal servicing. If you can not see a witness line and you can see a fillet seal then you must visually inspect the seal for damage if physically possible. In areas where you can not visually inspect the fillet seal then check the immediate area for signs of corrosion.
　
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