D.  
Access

 (1)  
Location Zone
 755 Body Landing Gear, LH
 765 Body Landing Gear, RH

 E.  
Procedure

 S 112-083
 CAUTION: DO NOT USE COMPRESSED AIR OR OTHER PRESSURIZED FLUIDS TO CLEAN
_______ THE FLOW FUSE. IF YOU CLEAN THE FLOW FUSE WITH HIGH PRESSURE, YOU CAN CAUSE DAMAGE TO THE INNER COMPONENTS OF THE FUSE. THIS CAN CAUSE THE FLOW FUSE TO OPERATE INCORRECTLY.
 (1)  
Clean the flow fuse (7) with solvent:

 (a)  
Flush the flow fuse(7) with acetone.

 (b)  
Make the flow fuse (7) dry with a clean cloth to remove all signs of the acetone.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-13-02
 ALL  ú ú 01 Page 209 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 642-145
 (2)  
Soak the O-ring (6) with hydraulic fluid.

 S 432-085

 (3)  
Install the O-ring (6) on the flow fuse (7).

 S 642-086

 (4)  
Apply a light layer of petrolatum to the O-ring (6).

 S 822-087

 (5)  
Make the extension of the pin (8) the same on each side of the flow fuse (7) (View B).

 NOTE: The difference in the extensions must be less than 0.005
____
 inch.

 S 422-088
 (6)  
Install the flow fuse (7):

 (a)  
Put the flow fuse (7) in the port of the shock strut.

 (b)  
Tighten the flow fuse (7) to 8-13 pound-feet.

 (c)  
Install a lockwire.

 S 432-089
 (7)  
Install the shutoff valve (9):

 (a)
Connect the shutoff valve (9) to the flow fuse (7).

 (b)  
Align the shutoff valve (9) with the hydraulic tube.

 (c)  
Connect the hydraulic tube to the shutoff valve (9).

 (d)  
Tighten all the connections.

 (8)  
Open the shutoff valve (9) with a 3/16-inch hex wrench.

 (9)  
Do a full servicing on the shock strut (Ref 12-15-04/301).

 (10)
 Make sure the pressure gage (3) operates correctly.

 S 792-093

 (11)
 Make sure there is not leakage.

 F.
Put the Airplane back to its Usual Condition

 S 422-090
 S 612-091
 S 782-092
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-13-02
 ALL  ú ú 01 Page 210 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 092-094
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASKS 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.
 (1)  
Do this task: "Removal of the Door Locks from the Wing Landing Gear" (Ref 32-00-30/201).

 S 092-095

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

 TASK 32-13-02-102-108
 6. Clogged Flow Fuse Repair
________________________
 A. General
 (1)  
This procedure is applicable only when the shock strut does not agree with the curve on the servicing placard. Also, the pressure at the air valve must be different from the indication on the strut pressure gage.

 B.
Consumable Materials

 (1)  
D00507 Hydraulic Fluid - MIL-H-6083

 C.
References

 (1)  
09-11-00/201, Towing

 (2)  
12-15-04/301, Body Landing Gear Shock Strut

 (3)  
32-00-30/201, Landing Gear Door Locks

 (4)  
IPC 32-13-01 Fig. 5

 D.
Access

 (1)  
Location Zone
 755 Body Landing Gear, LH
 765 Body Landing Gear, RH
　
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