747-400 AMM 飞机维护手册 STANDARD PRACTICES - AIRFRAME(79)

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747-400 MAINTENANCE MANUAL
 LUBRICATION FITTINGS - REMOVAL/INSTALLATION
___________________________________________
 1.  General_______
 A.  This procedure contains the installation instructions for a lubrication fitting (press-in type). Refer to Airplane Maintenance Manual 32-00-50 Page 801 for repair of lubrication retainers for the landing gear.
 TASK 20-11-27-424-010
 2.  Install the Lubrication Fittings (Fig. 401)________________________________
 A.  General
 (1)  This task contains instructions for the installation of new lubrication fittings and lubrication fittings that were blown out.
 B.  References
 (1)  CMM 32-00-03, Landing Gear Parts
 C.  Equipment
 (1)  
Drive Tool - 5253-3 (for Alemite Type 1728B
 lubrication fittings)

 (2)  
Drive Tool - 5254-1 (for Alemite 1646B and
 1992B lubrication angle fittings)

 

 D.  Consumable Materials
 (1)  
B00722 Solvent - P-D-680

 (2)  
B00083 Solvent Aliphatic Naphta - TT-N-95

 (3)  
G00262 Nitrogen - Liquid, MIL-P-27401

 (4)  
C00316 Primer - Loctite Grade T (747I)

 (5)  
Adhesive:

 (a)  
G00106 Retaining Loctite 675 or MIL-R-46082

 (b)  
G00106 Loctite RC/680 or MIL-R-46082

 

 (6)  
Cotton Swab (Commercially Available)

 E.  Install a New Lubrication Fitting
 S 844-012
 (1)
Get an applicable standard fitting to install in the hole.

 S 164-003

 (2)  
Do these steps to clean the lubrication fitting hole:

 (a)  Use a cotton swab to remove as much grease as possible from the inner surface of the lubrication fitting hole.
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 20-11-27
 ALL  ú ú 02 Page 401 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
DESIGN LUBE HOLE DIA IS 0.188/0.189 INCHES
LUBE HOLE  LUBE FITTING 
DIA (X)  DIA 
(INCHES)  (INCHES) 
0.194 MAX  3/16  1 
0.195-0.247  1/4 MODIFIED  1 
0.248-0.249  1/4  2 
0.250-0.254  1/4  1 

INSTALL WITH ADHESIVE INSTALLATION WITH ADHESIVE OPTIONAL

ALL DIMENSIONS ARE IN INCHES
X (NOT SHOWN) = HOLE DIA IN MATING COMPONENT
A = SHANK DIA (X MINUS 0.007/0.012)
B = SERRATION OD (X PLUS 0.005/0.010)
C = SERRATION ROOT OD (X MINUS 0.003/0.010)

Lubrication Fitting Modification and Installation
Figure 401

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 20-11-27
 ALL  ú ú 01 Page 402 ú Oct 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 (b)  
Clean the hole to a depth of at least 0.5 inch with solvent or detergent on a clean cotton swab.

 (c)  
Clean the hole until you can see no more grease or dirt removed from the hole.

 S 424-011
 CAUTION: MAKE SURE YOU USE THE CORRECT TOOL TO INSTALL THE LUBRICATION
_______ FITTING. MOVE THE FITTING IN A STRAIGHT LINE TO PREVENT DAMAGE TO THE MATING PART.
 (3)  Use the correct drive tool to install the fitting into the hole in the part the fitting connects to.
 F. Install a Lubrication Fitting to Replace a Fitting that was Blown Out
 S 844-013
 (1)  Get a special approved or an oversized fitting to install in the hole.
 S 164-006
 (2)  Do these steps to clean the lubrication fitting hole: (a) Use a cotton swab to remove as much grease as possible from the inner surface of the lubrication fitting hole. (b) Clean the hole to a depth of at least 0.5 inch with solvent or detergent on a clean cotton swab. (c) Clean the hole until you can see no more grease or dirt removed from the hole.
 S 394-009
 (3)  Do these steps to apply the primer: (a) Use a cotton swab to apply a thin layer of primer to the inner diameter of the hole.
　
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