WALKING BEAMRETRACT ACTUATOR FWD
A
1.  BOLT
8.  BEARING (2 LOCATIONS)
HOUSING
STRUCTURE

3.  BEARING HOUSING
2.  WALKING BEAM SUPPORT
STRUCTURE
7.  SHIM
BARREL
NUT

4.  
SHIM

5.  
BOLT (4 LOCATIONS)

6.  
BOLT
(2 LOCATIONS)

9.  BOLT
B
Walking Beam Support - Installation
Figure 401

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 32-11-18
 ALL  ú ú 01 Page 402 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 494-035
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2)  
Do this task: "Installation of the Door Locks on the Wing Landing Gear" (Ref 32-00-30/201).

 S 494-036

 (3)  
Do this task: "Installation of the Door Locks on the Body Landing Gear" (Ref 32-00-30/201).

 S 844-004

 (4)  
Release the pressure from the hydraulic system No. 4 (Ref
 29-11-00/201).

 S 014-005

 (5)  
Lower the access panel for the trailing edge (571AB LH and 671AB RH) (Ref 06-09-08/201).

 D.
Procedure

 S 034-006
 (1)  
Remove the two halves of the walking beam for the wing landing gear (Ref 32-11-15/401).

 S 034-007

 (2)  
Remove the head end of the actuator from the bolt of the walking beam support (Ref 32-32-01/401).

 S 014-008

 (3)  
Remove the top panel above the spar of the landing gear near the support.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 014-009
 (4)  
Remove the flap track fairing or the cover panel of the trailing edge to get access to the aft face of the beam.

 S 034-010

 (5)  
Remove the tie-rod of the trailing edge.

 S 034-011

 (6)  
Remove two bolts (6) aft through the landing gear beam.

 S 034-012

 (7)  
Remove 4 bolts (5) that hold the bearing housing (3) to the structure at the forward bearing.

 S 034-039

 (8)  
Keep the bearing housing with the support (2).

 S 034-013

 (9)  
Remove the 2 bolts (1) that hold the bearing housing (8) through the top flange of the beam and through the top beam web.

 S 024-014

 (10)
 Turn the forward end of the support (2) up to permit the support with the bearing housing (8) to move forward and down.

 (a)  
Remove the support from the structure.

 NOTE: Keep the shim (4 and 7) between the support and the
____ bearing housings (3 and 8) for the installation.
 S 034-015
 (11)
 Remove the bolt (9) from the support (2).

 S 034-016

 (12)
 Remove the housings (3 and 8) and the bearings from the support (2).

 TASK 32-11-18-404-017
 3. Walking Beam Support Installation (Fig. 401)
__________________________________
 A. Consumable Materials
 (1)  
A00247 Sealant - BMS 5-95

 B.
References

 (1)  
06-09-08/201, Wing Access Doors and Panels

 (2)  
09-11-00/201, Towing

 (3)  
12-21-01/301, Landing Gear

 (4)  
32-00-30/201, Landing Gear Door Locks

 (5)  
32-11-15/401, Wing Gear Walking Beam

 (6)  
32-11-16/201, Walking Beam-to-Hanger Bolt Assembly

 (7)  
32-32-01/401, Wing Gear Actuator

 (8)  
IPC 32-11-18 Fig. 10

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