737-300 400 500 AMM 飞机维护手册 起落架 LANDING GEAR 2(21)

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 1.  General_______
 A.  This subject has two tasks. The first task is a replacement of the active seals for the shock strut with the spare seals.
 B.  The second task is a replacement of the active seals and the spare seals for the shock strut.
 C.  The spare seals are in grooves in the lower bearing of the shock strut. One T-type dynamic seal is in the bottom groove. One O-ring type static seal is in the top groove. Use the spare seals to replace the active seals without a removal of the inner cylinder of the shock strut. When you use the spare seals, you must disassemble the shock strut when the subsequent seal replacement is necessary.
 D.  The backup rings are made of two parts. You can replace the backup rings without a removal of the inner cylinder of the shock strut.
 TASK 32-21-11-908-008
 2.  Replacement of the Active Shock Strut Seals with the Spare Seals________________________________________________________________
 A.  General
 (1)  
This task gives you instructions to replace the active seals for the shock strut with the spare seals.

 B.  
Special Tools and Equipment

 (1)  
F80013-1 - Pin Spanner Adapter Assembly

 C.  
Standard Tools and Equipment

 (1)  
Tool - Plastic (for the removal of O-ring type seals)

 (2)  
Metal Strip - Thin (for backup when you cut the seals)

 (3)  
Pan - Drip

 (4)  
Wrench - Torque; 1/2" drive, calibrated in lb-ft

 (5)  
Gun - Semco, sealant

 (6)  
Bottle - Propylethylene, squirt (for the alcohol-distilled water solution)

 (7)  
Spatula - Wooden or plastic (for the removal and application of sealant)

 (8)  
Wooden Blocks - two of the same dimension (for the installation of the lower bearing into the outer cylinder)

 (9)  
Brush - Small (for the application of primer)

 (10)
 Cloth - Pieces of new or cleaned, white; with less than 0.75% oil (carbon tetrachloride extraction) and free from silicone

 (11)
 Pads - Cloth (for the protection of the shock strut when you remove the gland nut)

 (12)
 Wrench - Crow's Foot

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 32-21-11
 ALL  ú ú 01 Page 801 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
A
A

LOWER 
CENTERING 
INNER  CAM 
CYLINDER 
19. UPPER TORSION ACTIVE STATIC-
LINK ACTIVE  SEAL O-RING 
DYNAMIC- OUTER 
SEAL  CYLINDER 
ASSEMBLY 
SPARE STATIC-
SEE  A  SEAL O-RING 
GLAND NUT 
NUT LOCK 18. GLAND  1. BACKUP RING SCRAPER ADAPTER  SEAL ASSEMBLY SPARE DYNAMIC-
17. ACTIVE STATIC-SEAL O-RING  2. LOWER SCRAPER RING 
CENTERING 
CAM 
16. ACTIVE DYNAMIC- 4. SPARE STATIC- A-A 
SEAL ASSEMBLY  SEAL O-RING 
5. SPARE DYNAMIC-

3. BACKUP RING
 SEAL ASSEMBLY (BLACK CYLINDERNYLATRON)6. LOWER BEARING OR PISTON
15. SCRAPER (EXAMPLE) (EXAMPLE)ADAPTER
7.
 SCRAPER RING

ACTIVE
8.
 GLAND NUT

SEAL PIN
14. COTTER(EXAMPLE)12A. BUSHING NOTE POSITION3. BACKUP RING
OF RADIUS13. NUT
(WHITE TEFLON) (EXAMPLE)
12. BEARING 9. LOWER TORSION
11. WASHER  ACTIVE DYNAMIC-SEAL
LINK
ASSEMBLY INSTALLATION
10. BOLT
A
Nose Gear Shock Strut Seal Replacement Figure 801 (Sheet 1)
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 32-21-11
 ALL  ú ú 02 Page 802 ú Mar 15/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
LOWER
CENTERING

CAM RING
ELASTOMER
CAM SEAL RING
(PLASTIC)

PRESSURE DIRECTION

OPTIONAL ACTIVE DYNAMIC-SEAL ASSEMBLIES

Nose Gear Shock Strut Seal Replacement
Figure 801 (Sheet 2)
　
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