52-32-03
ALL ú ú 02 Page 410 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
WARNING:_______ MAKE SURE THAT PERSONS AND EQUIPMENT ARE AWAY FROM
THE DOOR AND THE DOOR OPENING WHEN YOU OPERATE THE DOOR.
FAILURE OF THE LIFT MECHANISM COULD CAUSE THE DOOR TO
CLOSE QUICKLY WHICH COULD CAUSE INJURY OR DAMAGE.
(a)
Open the door to the correct position. 1) Manually turn the lift power unit to move the door. 2) Measure the clearance between the actuator arm and the door
up stop. 3) Stop the door when the clearance is 0.20 +/-0.01 inch (Detail E).
(b)
Move the switch to get 0.063 to 0.071 inch from the switch to the actuator arm.
S 864-066
(15)
Close these circuit breakers:
(a)
On the P415 Power Distribution Center - Right 1) 415F17 SIDE CARGO DOOR CONT
(b)
On the P715 Aux/Ext No. 2 Power Center 1) SIDE CARGO DOOR PWR
S 864-058
(16)
Close the door (Ref 52-32-00/001).
S 714-059
(17)
Open the door electrically to make sure it operates correctly (Ref 52-32-00/001).
S 864-060
(18)
Close the door (Ref 52-32-00/001).
S 414-061
(19)
Install the insulation you moved for access (Ref 25-21-04/401).
(20)
Remove electrical power if it is not necessary (Ref 24-22-00/201).
S 864-041
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52-32-03
ALL ú ú 02 Page 411 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
GEARBOX AND BRAKE ASSEMBLY - REMOVAL/INSTALLATION
_________________________________________________
1. General_______
A. This procedure contains two tasks:
(1)
The removal of the gearbox and brake assembly
(2)
The installation of the gearbox and brake assembly.
B.
Use this procedure for either of the gearbox and brake assemblies.
TASK 52-32-04-004-001
2. Remove the Gearbox and Brake Assembly (Fig._____________________________________401)
A. General
(1)
This procedure refers to the gearbox and brake assemblies as the gearbox.
B.
References
(1)
25-21-04/401, Sidewall and Ceiling Insulation
(2)
52-32-00/001, Side Cargo Door
(3)
IPC 52-32-02 Fig 1
(4)
SSM 52-32-01
(5)
WDM 52-32-11, 52-32-12
C.
Access
(1)
Location Zone
261 Main Deck STA 1720 To STA 2040
(2)
Access Panels
836L Door - Main Deck Cargo
D.
Procedure
S 864-023
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE AWAY FROM THE DOOR AND
_______ THE DOOR OPENING WHEN YOU OPERATE THE DOOR. FAILURE OF THE LIFT MECHANISM COULD CAUSE THE DOOR TO CLOSE QUICKLY WHICH COULD CAUSE INJURY OR DAMAGE.
(1)
Close and latch the door (Ref 52-32-00/001).
S 864-004
(2)
Open these circuit breakers:
(a)
P415 Power Distribution Center - Right 1) 415F17 SIDE CARGO DOOR CONT
(b)
P715 Aux/Ext No. 2 Power Center
1) SIDE CARGO DOOR PWR
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
52-32-04
ALL ú ú 02 Page 401 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
DOWN STOP AND DOOR DOWN SWITCH ROTARY ACTUATOR
SEE F
(2 LOCATIONS EACH
END OF DOOR)
LIFT MECHANISM POWER UNIT AND GEARBOXES
SEE A
TORQUE TUBE COUPLING
SEE B
FWD
QUILL SHAFT
SEE ETORQUE TUBE
TORQUE TUBE
COUPLING
SEE D
AFT GEARBOX
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