S 414-016
(9)
Connect the torque tube to the rotary actuator if it is necessary (Detail B).
(a)
Put one end of the torque tube into the internal splines of the gearbox and brake assembly.
(b)
If it is necessary to align the rotary actuator splines with the torque tube splines: 1) Turn the input shaft on the rotary actuator that is near
the edge of the door in the open direction.
(c)
Connect the coupling to the rotary actuator shaft with two screws.
(d)
Safety the screws with wire.
S 864-017
(10)
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 724-042
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.
(11) Open the door electrically to make sure it operates correctly (Ref 52-32-00/001).
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52-32-03
ALL ú ú 02 Page 406 ú Feb 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 864-048
(12)
Close the door (Ref 52-32-00/001).
S 414-049
(13)
Install the insulation you moved for access (Ref 25-21-04/401).
S 864-065
(14)
Remove electrical power if it is not necessary (Ref 24-22-00/201).
TASK 52-32-03-004-020
4. Remove the Actuator Arm (Fig. 401)_______________________
A. References
(1)
25-21-04/401, Sidewall and Ceiling Insulation
(2)
IPC 52-32-02 Fig 1
(3)
SSM 52-32-01
(4)
WDM 52-32-11, 52-32-12
B.
Access
(1)
Location Zone
261 Main Deck STA 1720 To STA 2040
(2)
Access Panels
836L Door - Main Deck Cargo
C.
Procedure
S 864-051
(1)
Open 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 014-054
(2)
Move the insulation blanket that is necessary for access (Ref 25-21-04/401).
S 014-021
(3)
Remove both rotary actuators and the quill shaft at the actuator arm. (Ref the "Remove the Rotary Actuator" task and Section A-A).
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52-32-03
ALL ú ú 02 Page 407 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 034-022
(4)
Disconnect the wires from the door down switch.
S 014-023
(5)
Remove the downstop (with the door down switch attached) from the bearing housings.
S 034-024
(6)
Disconnect the actuator link from the actuator arm.
S 024-025
(7)
Remove the bolts that attach each bearing housing to the structure.
NOTE: Make a note of the location of the two short bolts to
____
help subsequent installation.
S 024-050
(8)
Pull the bearing housings and the actuator arm clear of the structure.
S 034-026
(9)
Pull the bearing housings off the actuator arm.
S 844-058
(10)
Tag the bearing housings to help you identify them for subsequent installation.
NOTE: The left and right bearing housings are different.
____
TASK 52-32-03-404-027
5. Install the Actuator Arm (Fig. 401)
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