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32-13-15
ALL ú ú 01 Page 403 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(2)
D00013 Grease - MIL-G-23827 (optional)
B.
References
(1)
AMM 09-11-00/201, Towing
(2)
AMM 12-12-01/301, Hydraulic Systems
(3)
AMM 12-21-01/301, Landing Gear
(4)
AMM 29-11-00/201, Main Hydraulic Supply System
(5)
AMM 32-00-30/201, Landing Gear Door Locks
(6)
AMM 32-13-15/601, Body Gear Truck Positioning Actuator
(7)
AIPC 32-13-02 Fig. 2
(8)
AIPC 32-13-11 Fig. 1
(9)
AIPC 32-13-15 Fig. 2
C.
Access
(1)
Location Zone
755 Body Landing Gear, LH
765 Body Landing Gear, RH
D.
Prepare for Installation
S 224-012
(1)
Examine the actuator attach points for too many worn areas
(AMM 32-13-15/601).
E.
Installation (Fig. 401)
S 644-013
(1)
Butter lubricate all the nuts, bolts and washers immediately before you install them.
S 424-014
(2)
Install the actuator with the head end near the shock strut.
S 424-015
(3)
Install the actuator with the bolts, the clamp-up bushings, and the nylon spacers at each end of the actuator.
NOTE: The left actuator and the right actuator are
____ interchangeable. They are interchangeable if you put the hydraulic fitting in the correct position as shown in Fig. 401. You must install new O-rings (packing) on the hydraulic fitting when you change the position of the hydraulic fitting.
S 434-016
(4) Tighten the head end nut 600 to 1200 pound-inches and install the cotter pin.
NOTE: If it is necessary, loosen the nut to the nearest
____
castellation to install the cotter pin.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-13-15
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 434-017
(5) Tighten the rod end nut 720 to 960 pound-inches and install the cotter pin.
NOTE: If it is necessary, loosen the nut to the nearest
____
castellation to install the cotter pin.
S 864-018
(6)
Make sure the actuator is fully filled with fluid.
S 844-019
(7)
If it is necessary, open the bleed valve and fill the actuator with BMS 3-11 hydraulic fluid.
S 864-030
(8)
Close the bleed valve.
S 434-020
(9)
Connect the hydraulic line to the actuator.
S 874-033
(10)
Supply system No. 1 with hydraulic power (AMM 29-11-00/201).
S 794-022
(11)
Examine the hydraulic connection for leaks.
S 874-031
(12)
Open the bleed valve on the actuator and let 1 to 2 pints of fluid flow out of the valve.
NOTE: Let more fluid flow out of the valve if you continue to
____
see bubbles in the fluid.
NOTE: There is a hydraulic fuse in the truck positioning
____ system. If the fluid flow stops, put the hydraulic fuse in its usual condition. You must hold the manual bypass lever up for two seconds to do this.
S 434-024
(13)
Close the actuator bleed valve.
S 864-025
(14)
Put the hydraulic fuse in its usual condition.
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