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MAINTENANCE MANUAL

GUIDE ARM
(1 LOCATION)
FLUSH 
BMS 3-24

1 POINT

(1 LOCATION)
FILL THE EMPTY SPACE ABOVE THE BEARING, BETWEEN THE SHAFT AND THE BEARING HOUSING. THIS WILL HELP KEEP WATER OUT OF THE BEARING.
1 POINT
THE DOOR IS FULLY OPEN IN THIS VIEW.

Main Entry Doors No. 1-4 Figure 303 (Sheet 4)

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MAINTENANCE MANUAL

Main Entry Doors No. 1-4
Figure 303 (Sheet 5)

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MAINTENANCE MANUAL

DOOR DISARMING 
CABLE TERMINALS 
BMS 3-24 
(2 LOCATIONS) 
6 
TORQUE TUBE 
CENTER BEARING 
OR 
BMS 3-24  1 POINT 
(1 LOCATION) 
3  I 

LATCHING AND COCKING CRANK ROLLERS
FLUSH
BOLT
(4 LOCATIONS)  CONTROL CAM
ACCESS COVER

BMS 3-24 (2 LOCATIONS)
7
4 POINTS
J
3 FILL THE EMPTY SPACE ABOVE THE BEARING, BETWEEN THE SHAFT AND THE BEARING HOUSING. THIS WILL HELP KEEP WATER OUT OF THE BEARING.
6 LUBRICATE THE CABLE TERMINAL BALL AND SEAT AT THE TWO ENDS OF THE CABLE.
7 YOU MUST REMOVE THE CONTROL CAM ACCESS COVER TO GET TO THE LATCHING AND COCKING CRANK ROLLERS.
Main Entry Doors No. 1-4
Figure 303 (Sheet 6)

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747-400 MAINTENANCE MANUAL
SHAFT SPLINE
OR
BMS 3-24
(1 LOCATION)
SPROCKET BEARING AND SLEEVE
OR
BMS 3-24 CHAIN
(1 LOCATION)
8
SPROCKET BEARING SPROCKET
AND SLEEVE
ZERK
BMS 3-24
(1 LOCATION)
3 POINTS
9
K
HINGE ARM
HINGE ARM UPPER AND LOWER BEARINGS
OR
BELLCRANK
BMS 3-24 FLUSH
(2 LOCATIONS)
3 10 BMS 3-24
(1 LOCATION)
3 POINTS
L
3  FILL THE EMPTY SPACE ABOVE THE BEARING, BETWEEN THE SHAFT AND THE BEARING HOUSING. THIS WILL HELP KEEP WATER OUT OF THE BEARING.
8 ON AIRPLANES WITHOUT THE ZERK FITTING, YOU MUST DISASSEMBLE THE SPROCKET TO LUBRICATE THE SPROCKET BEARINGS AND SLEEVE (AMM 52-11-11/401).
9 ON AIRPLANES WITH THE ZERK FITTINGS, USE A GREASE GUN TO LUBRICATE THE SPROCKET BEARINGS AND SLEEVE.
10 YOU MUST LOOSEN THE NUT ABOVE THE UPPER BEARING BEFORE YOU APPLY THE GREASE. YOU MUST TIGHTEN THE NUT AFTER YOU APPLY THE GREASE.
Main Entry Doors No. 1-4 Figure 303 (Sheet 7)
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MAINTENANCE MANUAL

FWD
GUIDE ARM SEE C
LATCH ROLLER (4 LOCATIONS)
TORQUE TUBE SEE A
CENTER BEARING
SEE B
SEE D
SPROCKET BEARINGS AND SLEEVE
SEE I
TORQUE TUBE
CENTER BEARING
SEE J
SEE H
HINGE ARM UPPER AND LOWER BEARINGS
　
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