S 424-015

 (3)  
Install the valve with three bolts, the washer and the nuts
 (Fig. 401).

 NOTE: Install the bolts with the heads forward.
____
 S 434-016
 (4)
Remove the plugs and connect the hydraulic lines to the valve.

 S 864-017

 (5)  
Pressurize the hydraulic system No. 4 (Ref 29-11-00/201).

 S 214-018

 (6)  
Examine the hydraulic connections for the leakage.

 S 874-019

 (7)  
Open the bleed valve on the truck positioner actuator to bleed the pressure valve and the hydraulic lines.

 (a)  
Permit approximately 1 pint of fluid to flow from the valve outlet.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400
MAINTENANCE MANUAL

 (b)  Permit more fluid to flow if there are bubbles remaining in the system (Ref 32-11-20/401).
 S 094-024
 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.
 (8)  
Do this task: "Removal of the Door Locks on the Wing Landing Gear" (Ref 32-00-30/201).

 S 094-026

 (9)  
Do this task: "Removal of the Door Locks on the Body Landing Gear" (Ref 32-00-30/201).

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747-400 MAINTENANCE MANUAL
 WING GEAR TRUCK SHIELD AND BUMPER - REMOVAL/INSTALLATION
________________________________________________________
 1.  General_______
 A.  This procedure has four tasks:
 (1)  
The removal of the truck shield for the wing landing gear.

 (2)  
The installation of the truck shield for the wing landing gear.

 (3)  
The removal of the bumper for the wing landing gear.

 (4)  
The installation of the bumper for the wing landing gear.

 B.  
The truck shield is attached to the truck with bolts.

 C.  
The bumper is attached to Clamp B, which is located just forward of the inner cylinder.

 TASK 32-11-26-004-001
 2.  Wing Gear Truck Shield Removal (Fig. 401)______________________________
 A.  References
 (1)  
AMM 09-11-00/201, Towing

 (2)  
AMM 32-00-30/201, Landing Gear Door Locks

 (3)  
AIPC 32-11-26 Fig. 1

 B.  
Access

 (1)  
Location Zone
 735 Wing Landing Gear, LH
 745 Wing Landing Gear, RH

 C.  
Procedure

 S 024-025
 (1)  
Remove the Truck Shield (Fig. 401):

 (a)  
Disconnect the hydraulic guides from the shield and the forward bracket.

 (b)  
Disconnect the brake rod lanyards from the truck shield.

 (c)  
Remove the six bolts that attach the truck shield to the two forward brackets and one aft bracket.

 (d)  
Remove the six bolts that attach the truck shield to the pull box.

 (e)  
Remove the truck shield from the airplane.

 TASK 32-11-26-404-005
 3.  Wing Gear Truck Shield Installation____________________________________
 A.  Access
 (1)  Location Zone
 735 Wing Landing Gear, LH
 745 Wing Landing Gear, RH

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 32-11-26
　
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