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747-400
MAINTENANCE MANUAL

FWDFWD
B-BA-A
NOTE:  ONLY THE SILL ROLLER SUPPORT IS SHOWN, THE REST OF THE SILL ASSEMBLY IS NOT SHOWN FOR CLARITY.
DOOR LATCH SHIMS

INBD
C-C
THE CLEARANCE MUST BE 0.000 INCH FOR AT LEAST ONE SILL ROLLER SUPPORT ON EACH OUTBOARD SILL ASSEMBLY. THE CLEARANCE MUST BE LESS THAN 0.020 INCH FOR THE REMAINING SILL ROLLER SUPPORTS

Retractable Side Door Sill Roller/Caster Guide Assembly Installation
Figure 401 (Sheet 2)

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747-400 MAINTENANCE MANUAL
 CASTER AND ROLLER TRAYS - REMOVAL/INSTALLATION
______________________________________________
 1.  General
_______
 A.  This procedure has two tasks. The first task gives instructions to remove the caster trays and roller trays. The second task gives instructions to install the caster trays and roller trays.
 TASK 25-57-04-004-001
 2.  Caster and Roller Trays Removal (Fig. 401)
_______________________________
 A.  Access
 (1)  Location Zone
 210 Main Deck

 B.  Remove the Caster and Roller Trays
 S 034-002
 (1) Turn the T-bolt fasteners a quarter turn.
 NOTE: The groove in the top of the T-bolt fastener must point
____
 laterally.

 S 024-003
 (2) Remove the tray from the floor fittings.
 C.  Remove a Caster
 S 034-012
 (1)
Remove the four nuts, washers, and bolts.

 S 024-013

 (2)
Remove the caster.

 D.  Remove a Roller
 S 034-014
 (1)
Remove the nut, washer, and bolt.

 (2)
Remove the roller.

 S 024-015
 TASK 25-57-04-404-005
 3.  Caster and Roller Trays Installation (Fig. 401)
____________________________________
 A.  Access
 (1)  Location Zone
 210 Main Deck

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747-400
MAINTENANCE MANUAL

CASTER 
LOW DENSITY 
CASTER TRAY  HIGH DENSITY 
CASTER TRAY 
NUT 
WASHER 
BOLT 
"T" BOLT 
(EXAMPLE) 
FLOOR 
FITTINGS 
(EXAMPLE) 

CASTER TRAY
A

Caster/Roller Tray Installation
Figure 401 (Sheet 1)

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C25412
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747-400
MAINTENANCE MANUAL

ALL BOLTS SHOULD BE INSTALLED THE SAME WAY ON ANY GIVEN ROLLER TRAY
Caster/Roller Tray Installation Figure 401 (Sheet 2)
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747-400 MAINTENANCE MANUAL
 B. Install a Roller
 S 424-006
 (1)  
Put the roller in its position in the tray.

 S 434-016

 (2)  
Install the bolt, washer, and nut.
　
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