S 094-040

 (2)  
Do this task: "Removal of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 BODY LANDING GEAR SHOCK STRUT - REPAIRS
_______________________________________
 1.  General_______
 A.  This procedure gives the seal replacement instructions for a one piece configuration. This configuration has the lower bearing and the seal carrier as a one piece assembly.
 B.  This procedure contains three tasks:
 (1)  
The replacement of the inner cylinder seals with the spare seals (lift the airplane with the jacks or lower the gear on a pit)

 (2)  
The replacement of the inner cylinder seals and the spare seals

 (3)  
The replacement of the inner cylinder seals with the spare seals. (without the use of the airplane jack)

 C.  
You can repair the seal leaks in the shock strut with the replacement of the lower bearing seals. You can find the spare seals in the grooves of the lower bearing. You can use the spare seals for the first and second seal replacement. The removal of the inner cylinder or other primary components for the seal replacement is not necessary.

 D.  
Disconnect the truck beam from the inner cylinder yoke and move the seals through the yoke for more seal replacements. You put MIL-H-5606 fluid on the edge of the replacement seals which have four marks. And put BMS 3-11 fluid on the replacement seals which have three marks.

 TASK 32-13-02-368-113
 2.  Inner Cylinder Seals Replacement with The Spare Seals (Lift The Airplane with_____________________________________________________ The Jacks or Lower The Gear on a Pit) (Fig. 801)
 A.  Special Tools and Equipment
 (1)  
MIT65B01201 Lower Gland Nut Wrench Adapter

 (2)  
G32011-1 - Oversize Gland Nut Wrench Adapter (Airplanes with oversize gland nut)

 (3)  
7MIT65B01211-1 Lower Gland Seal Split Guide

 (4)  
21MIT65B01211-1 Gland Seating Tool - BG, WG, NG

 (5)  
2MIT65B01201 Lower Bearing Seal Retainer Puller

 (6)  
747 MLG-1100 Compression Strap; Flex-e-on Inc., 30600 Solon Industrial Pkwy, Solon, Ohio 44139

 (7)  
747 MLG-1200 Seal Guide Ring; Flex-e-on Inc., 30600 Solon Industrial Pkwy, Solon, Ohio 44139

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
A
RETAINER
PLATE
OUTER
CYLINDER
A-A
EMERGENCY SHUTOFF SEE A
FLOW FUSE
SHUTOFF VALVE
INNER
CYLINDER

INNER CYLINDER
YOKE

A
Shock Strut for the Body Landing Gear Figure 801
AIR VALVE (BELOW RIM)
"X"
OUTER CYLINDER
OIL FILL VALVE WITH PRESSURE GAGE
A
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

O-RING PACKING INSTALLED BY VENDOR FOR SHIPMENT;
NOT REQUIRED FOR AIRPLANE OPERATIONS.
IF REMOVED, DOES NOT HAVE TO BE REINSTALLED

Shock Strut Seal Details for the Body Landing Gear
Figure 802

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