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32-11-20
ALL ú ú 01 Page 405 ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 614-021
(10) If it is necessary, open the bleed valve and fill the actuator with BMS 3-11 hydraulic fluid.
NOTE: Close the bleed valve.
____
S 434-022
(11)
Connect the hydraulic line to the actuator.
S 864-023
(12)
Supply the system No. 4 hydraulic power (AMM 29-11-00/201).
S 214-024
(13)
Examine the hydraulic connections for leakage.
S 874-025
(14)
Open the bleed valve and permit approximately 1 pint of fluid to flow from the valve outlet.
(a)
Permit more fluid to flow if the bubbles are in the system.
(b)
Tighten the bleed valve and install the lockwire.
S 614-026
(15)
Examine the hydraulic reservoir level and fill the reservoir if it is necessary (AMM 12-12-01/301).
(16)
Lubricate the actuator (AMM 12-21-01/301).
S 614-036
S 094-031
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.
(17) Do this task: "Removal of the Door Locks on the Wing Landing Gear" (AMM 32-00-30/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-11-20
ALL ú ú 01 Page 406 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 094-032
(18) Do this task: "Removal of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-11-20
ALL ú ú 01 Page 407 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
WING GEAR TRUCK POSITIONING ACTUATOR - INSPECTION/CHECK
_______________________________________________________
1. General_______
A. This proceudre has one task:
B. The examination of the fit of the forward and the aft actuator pin assemblies.
C. You must remove the positioning actuator, the forward and the aft pin assemblies to do the inspection.
TASK 32-11-20-206-001
2. Truck Positioning Actuator Examination For Worn Areas (Fig. 601)_____________________________________________________
A. References
(1)
20-11-01, Bearings and Bushings
(2)
32-11-20, Wing Gear Truck Positioning Actuator
(3)
IPC 32-11-02 Fig. 2, IPC 32-11-20 Fig. 1, IPC 32-11-21 Fig. 1
B.
Access
(1)
Location Zone
735 Wing Landing Gear, LH
745 Wing Landing Gear, RH
C.
Procedure
S 026-002
(1)
Remove the positioning actuator, the forward and the aft pin assemblies (Ref 32-11-20/401, 20-11-01/401).
S 226-003
(2)
Examine the worn limits of the forward and the aft pin assemblies.
(a)
Measure the parts if it is necessary and compare the measured dimensions to the limit dimensions.
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