25-53-12
ALL ú ú 01 Page 404 ú Jun 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
CARGO DOORWAY RETRACTABLE
GUIDE RAIL
ACTUATOR
SEE A SET THE ROD TO
6.20 |0.01 INCHES
(157.48 |0.25 mm) GUIDE RAIL (DIMENSION B) (RETRACTED)
1
0.80 |0.06 INCH
(20.32 |1.52 mm) (DIMENSION A)
FWD ROD ASSEMBLY
FORWARD AND AFT CARGO
CRANK
COMPARTMENTS
FWD GUIDE RAIL
ACTUATOR ROD SUPPORT
END BEARING
SEE B
ACTUATOR END CRANK ARM
FITTING LINKAGEGUIDE RAIL
SEE B (RETRACTED)
GUIDE RAIL ACTUATOR ELECTRICAL
2
CONNECTOR
RETRACTABLE GUIDE RAIL ACTUATOR
0.80 |0.06 INCH
(EXAMPLE)
(20.32 |1.52 mm) (DIMENSION A)
A
ROD ASSEMBLY SET THE ROD TO
6.20 |0.01 INCHES
(157.48 |0.25 mm) CRANK ARM (DIMENSION B)LINKAGE
3
GUIDE 0.80 |0.06 INCH RAIL (20.32 |1.52 mm) SUPPORT
ACTUATOR (DIMENSION A) ROD END BEARING ROD ASSEMBLY
SEE B CRANK
1 THE CONFIGURATION FOR THE FORWARD
ACTUATOR ROD GUIDE RAIL IN THE FORWARD AND THE
END BEARING AFT CARGO COMPARTMENT
SEE B GUIDE RAIL
2 THE CONFIGURATION FOR THE AFT SUPPORT
GUIDE RAIL IN THE FORWARD
COMPARTMENT
3 THE CONFIGURATION FOR THE AFT
GUIDE RAIL IN THE AFT COMPARTMENT
Guide Rail Actuator Installation
Figure 401 (Sheet 1)
L46425
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25-53-12
ALL ú ú 10 Page 405 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
2 BOLT
WASHER
ROD ASSEMBLY (ADJUSTABLE END) CRANK ARM LINKAGE
1 WASHER
CRANK
NUT
WASHER
NUT PUSH-FIT 1.02-1.28 INCHES
WASHER PRESS-FIT BUSHING (PRESS-FIT BUSHING BUSHING IS ON (25.90-32.51 mm) (DIMENSION X)
BOLT THE FAR SIDE) ACTUATOR ROD END BEARING
PUSH-FIT
BUSHING 1.02-1.28 INCHES
(25.90-32.51 mm)
ACTUATOR ROD (DIMENSION X)
END BEARING
ACTUATOR PUSH-FIT
END FITTING BUSHING (2 LOCATIONS)
ACTUATOR NUTATTACHMENT WASHER
FITTING
3
CRANK
ELECTRICAL WASHERWASHER CONNECTOR STRUCTURE
ROD BOLT
NUTASSEMBLY
ACTUATOR ROD END BEARING PRESS-FIT (EXAMPLE) BUSHING
WASHER
B
PUSH-FIT BUSHING
ACTUATOR ROD ENDBOLT 1.02-1.28 INCHES BEARING
(25.90-32.51 mm) (DIMENSION X)
Guide Rail Actuator Installation Figure 401 (Sheet 2)
L46426
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25-53-12
ALL ú ú 12 Page 406 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 864-020
(4) Push the caution light on the cargo control panel to make the light flash.
F. Install the Guide Rail Actuator.
S 824-021
CAUTION: YOU MUST PUT THE ACTUATOR LIMIT SWITCH TO THE CORRECT POSITION.
_______ IT IS DIFFERENT BETWEEN THE DIFFERENT LOCATIONS OF THE INSTALLATIONS. IF YOU DO NOT SET IT CORRECTLY, IT IS POSSIBLE THE SYSTEM WILL NOT OPERATE CORRECTLY.
(1)
If you install a different actuator from the one removed, prepare the new actuator for the installation (Ref 25-53-21/201).
S 644-022
(2)
Lubricate the attachment fitting bushings with the grease.
S 424-023
(3)
Connect the actuator end fitting with the bolt, the washers and the nut.
S 644-024
(4)
Lubricate the outer diameter of the push-fit bushings for the linkage with the grease.
S 434-025
(5)
Connect the rod end bearing to the linkage with the bolt, the washers, and the nut.
S 434-028
(6)
Connect the electrical connector to the applicable guide rail
actuator. ~.................................................................. | CARGO | LATERAL | ELECTRICAL | GUIDE RAIL | | COMPARTMENT | GUIDE RAIL | CONNECTOR | ACTUATOR | .................................................................... | Forward | Fwd | DM495 | M495 | | | Aft | DM494 | M494 | .................................................................... | Aft | Fwd | DM157 | M157 | | | Aft | DM138 | M138 | 2.................….................…...............…..............1
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