C. Install a Caster
 S 424-017
 (1)  
Put the caster in its position in the tray.

 S 434-018

 (2)  
Install the four bolts, washers, and nuts.

 D. Install the Caster and Roller Trays
 S 214-007
 (1)  
Make sure the floor fittings are clean and free of unwanted materials.

 S 424-019

 (2)  
Put the tray in its position on the floor.

 NOTE: Make sure you install the correct tray in its correct
____ position on the floor. A marker with a reference number is attached to the tray and adjacent to the tray on the floor. The marker on the tray and the marker on the floor must have the same the reference number.
 S 434-009
 (3)  Turn the T-bolt fasteners a quarter turn.
 NOTE: The groove in the top of the T-bolt fastener must point
____
 longitudinally.

 S 714-011
 (4) Make sure the casters and rollers in the tray can turn freely.
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747-400 MAINTENANCE MANUAL
 CASTER PANEL ASSEMBLY - REMOVAL/INSTALLATION
____________________________________________
 1.  General
_______
 A.  This procedure has these tasks.
 (1)  
The removal of the caster panel assembly.

 (2)  
The installation of the caster panel assembly.

 B.  There are 16 caster panel assemblies in the door opening of the side cargo door. Each caster panel assembly has a lateral guide. The lateral guides can extend and retract.
 C.  The caster panel assemblies which are forward and aft of the retractable/steerable PDU 19R1 have longitudinal guide/stops. The longitudinal guide/stops can extend and retract.
 TASK 25-57-05-004-001
 2.  Caster Panel Assembly Removal (Fig. 401)
_____________________________
 A.  Access
 (1)  Location Zone
 210 Main Deck

 B.  Procedure
 S 864-008
 (1)  
Retract the lateral guide.

 S 864-009

 (2)  
Retract the longitudinal guide/stop(s).

 NOTE: The longitudinal guide/stops are not installed on all the
____
 caster panel assemblies.

 S 034-002
 (3)  Lift the shear-plunger levers to release the caster panel assembly from the floor fittings.
 NOTE: The shear-plunger levers must stay locked in the up position.
____
 S 034-003
 (4)  Move the caster panel assembly approximately 0.50 inch in the forward or aft direction.
 NOTE: The tension studs on the bottom the caster panel assembly
____ must align with the holes in the floor fittings.
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747-400 MAINTENANCE MANUAL
 S 024-010
 (5)  Remove the caster panel assembly.
 TASK 25-57-05-404-004
 3.  Caster Panel Assembly Installation (Fig. 401)__________________________________
 A. Access
 (1)  Location Zone
 210 Main Deck

 B. Procedure
 S 214-005
 (1)  
Make sure the shear-plunger levers are locked in the up position.

 S 434-011

 (2)  
Align the tension studs on the bottom of the caster panel assembly with the floor fittings.

 S 424-012

 (3)  
Lower the caster panel assembly into the floor fittings.

 S 434-013

 (4)  
Move the caster panel assembly approximately 0.50 inch in the forward or aft direction.

 S 434-014

 (5)  
Lower the shear-plunger levers to lock the caster panel assembly to the floor fittings.

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