S 424-054

 (9)  
Install the rod No. 2.

 (a)  
Apply a thin layer of grease on the shank and threads of the bolts and other attachment parts.

 (b)  
Connect the rod to the trunnion drive crank.

 (c)  
Adjust the length of the rod until the bolt holes in the rod end and the bellcrank align.

 CAUTION: WHEN YOU CONNECT THE ROD NO. 2 TO THE LEFT BELLCRANK,
_______ YOU MUST INSTALL THE BOLT WITH THE BOLT HEAD OUTBOARD. IF THE BOLT HEAD IS INBOARD, THE BOLT COULD HIT THE GROUND DOOR RELEASE ROD NO. 3. THIS COULD CAUSE DAMAGE TO EQUIPMENT.
 (d) Install the bolt which connects the rod to the bellcrank.
 NOTE: On the left bellcrank, you must install the bolt
____ with the head outboard. On the right bellcrank, you can install the bolt with the head inboard or outboard.
 (e)  Install and tighten the nut.
 S 094-025
 (10)
 Remove the rigging pin ND-1 or ND-2.

 S 424-031

 (11)
 Install the rod No. 1.

 (a)  
Apply a thin layer of grease on the shank and threads of the bolts and other attachment parts.

 (b)  
Connect the rod to the aft door hinge. 1) Hold the adjustable end of the rod in its position in the

 aft door hinge. 2) Install the bushing, washers, and bolt. 3) Install and tighten the nut.

 (c)  
Connect the rod to the bellcrank. 1) Install the washers and the bolt with the bolt head

 inboard.
 2) Install and tighten the nut.

 H. Adjustment
 S 864-056
 WARNING: YOU MUST CAREFULLY INSTALL THE GROUND LOCKS IN ALL LANDING
_______ GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1) Install the ground lockpins in all landing gear (AMM 09-11-00/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 (2)  S 584-035Lift the nose of the airplane on jacks for nose gear retraction (AMM 07-11-02/201).
 (3)  S 864-036Pressurize hydraulic system No. 1 (AMM 29-11-00/201).
 S 094-057

 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ DOOR LOCKS FROM THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (4)  
Do this task: "Removal of the Door Locks on the Nose Landing Gear" (AMM 32-00-30/201).

 S 864-038

 (5)  
Remove the ground lockpin from the nose landing gear (AMM 09-11-00/201).

 S 864-058
 WARNING: MAKE SURE ALL PERSONS AND EQUIPMENT ARE AWAY FROM THE LANDING
_______ GEAR AND DOOR OPERATION AREA. A FAST MOVEMENT OF THE LANDING GEAR AND DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (6)  
Move the control lever for the landing gear to the UP position to retract the nose gear.

 S 224-040

 (7)  
Measure the mismatch between the surface contours of the forward and aft doors, and make sure the maximum mismatch is not more than 0.18 inch.

 S 864-041

 (8)  
Move the control lever for the landing gear to the DN position to extend the nose gear.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 S 824-059
 (9)  
If the maximum mismatch of surface contour that you measured was more than 0.18 inch, adjust the mismatch with the steps which follow:

 (a)  
Adjust the length of rod No. 1 to get a maximum mismatch of less than 0.18 inch.

 (b)  
Move the control lever for the landing gear to the UP position to retract the landing gear.

 (c)  
Make sure the maximum mismatch of the surface contours is less than 0.18 inch.

 (d)  
　
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