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B.  Transfer panel No. 1 is vertically secured on the outboard side by four floor track studs engaged in floor track No. 1. The inboard side is vertically restrained when the four retractable side guides are installed.
C.  Transfer panels No. 2, 3, and 4 are vertically restrained by floor track studs interlocked in slots of floor tracks No. 3, 4, 5 and 6 and locked in position in the forward and aft directions by spring-loaded plungers which fit in the circular cutouts in the floor tracks.
2.  Removal/Installation Transfer Panel No. 1 (Fig. 401)
A.  Remove Transfer Panel
(1)  
If installed, remove four retractable side guide assemblies (Ref 25-56-41, Removal/Installation).

(2)  
Shift panel aft until floor track studs align with circular cutouts in floor track No. 1, then lift panel clear of floor track and remove.

B.  Install Transfer Panel
(1)  
Place panel in position and align floor track studs with circular cutouts in floor track No. 1.

(2)  
Allow floor track studs to enter floor track cutouts and shift panel forward to proper position.

(3)  
Install four retractable side guide assemblies (Ref 25-56-41, Removal/Installation).

3.  Removal/Installation Transfer Panels No. 2, 3 and 4 (Fig. 401)
A.  Remove Transfer Panels
(1)  
Raise spring-loaded plungers at aft end of panel and shift panel aft until the floor track studs align with circular cutouts in the floor tracks.

(2)  
Lift panel clear of floor tracks and remove.

Feb 15/81 25-56-11 Page 401
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

Transfer Panels Installation  511 
25-56-11 Page 402  Figure 401 (Sheet 1) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  May 15/68 

511  Transfer Panels Installation 
May 15/68  Figure 401 (Sheet 2) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  25-56-11 Page 403 

B.  Install Transfer Panels
(1)  
Place panel in position and align floor track studs with circular cutouts in floor tracks.

(2)  
Lift spring-loaded plungers; allow floor track studs to enter floor track cutouts, then shift panel forward to proper position.

(3)  
After panel is in proper position, release plungers and ensure they seat properly in floor track circular cutouts.

511 
25-56-11 Page 404  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Aug 15/73 

ROLLER TRAY - REMOVAL/INSTALLATION
1.  Remove Roller Tray (See figure 401.)
A.  Lift plunger release handle to its vertical position and slide tray forward or aft (approximately half inch) until tray will lift clear of floor track.
2.  Install Roller Tray (See figure 401.)
A.  Place roller tray on floor track adjacent to corresponding part numbered decal on cabin floor.
B.  Lift plunger release handle to its vertical position, slide tray forward or aft until the tray floor track attachment studs enter circular cutouts in the floor track, and align tray with decal for proper location.
C.  Press plunger release handle down to engage plunger in floor track. Ensure that plunger release handle is in full down position.
NOTE:  The plunger release handle is spring-loaded and will tilt up approximately 45 degrees when the plunger is not completely extended into the floor track.
D.  Check that the roller tray is secured in the floor track by attempting to remove the tray without releasing the plunger.
511 
May 15/68  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  25-56-21 Page 401 

Roller Tray Installation  511 
25-56-21  Figure 401  May 15/68 
Page 402 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

GUIDE RAIL ASSEMBLIES - REMOVAL/INSTALLATION
1.  Remove Guide Rail (See figure 401.)
A.  Lift and hold plunger release handle on each of the three side restraint guide assemblies and slide guide rail assembly aft (approximately half inch).
B.  Lift guide rail assembly clear of the floor track and floor anchorplates and remove.
2.  Install Guide Rail (See figure 401.)
A.  Place guide rail assembly on floor track adjacent to corresponding part numbered decal on cabin floor.
B.  Align the single floor anchorplate studs ( on the inboard lower surface of each of the three side restraint guides ) with the circular cutout in the floor anchorplates and allow studs to enter the cutouts.
　
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