TEFLON BACKUP RING SEE SCARFED EDGE (2 LOCATIONS)
(SHOWN LARGER
THAN USUAL)
Teflon Backup Ring Installation
Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-10-17
ALL ú ú 01 Page 401 ú Mar 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
O-RINGS - REMOVAL/INSTALLATION
______________________________
1. General_______
A. This procedure contains one task. The task is the installation of O-rings.
B. Use this procedure for the installation of O-rings over sharp edges. Sharp edges include threaded fasteners, keyways, slots, splines, and ports.
C. Before installation, examine the O-rings for cuts, abrasions,
deformities, and surface defects.
TASK 20-10-19-404-001
2. Installation of the O-Rings (Fig. 401)___________________________
A. Equipment
(1) O-ring Installation Tool - ST848-XXX
B. Consumable Materials
(1) Fluid used with component or system.
C. Procedure
S 804-002
(1)
Use the applicable ST848 series O-ring installation tools. ~........................................... | | FLARED AND FLARELESS TUBE | | TOOL NO. |OR HOSE FITTING SIZE (INCH)| ............................................. | ST848-187 | 3/16 | | -250 | 1/4 | | -312 | 5/16 | | -375 | 3/8 | | -500 | 1/2 | | -625 | 5/8 | | -750 | 3/4 | | -1000 | 1 | | -1250 | 1-1/4 | | -1500 | 1-1/2 | | -1750 | 1-3/4 | 2...............…...........................1
S 644-003
(2)
Apply a thin layer of the fluid used with the component or system on the O-ring.
S 434-004
CAUTION: DO NOT MAKE THE ELASTOMERIC O-RING INNER DIAMETERS LARGER BY
_______ MORE THAN 50 PERCENT DURING INSTALLATION. DO NOT MAKE THE TEFLON AND PLASTIC O-RING INNER DIAMETERS LARGER BY MORE THAN 5 PERCENT DURING INSTALLATION. FAILURE COULD OCCUR.
(3) Put the thimble over the fitting.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-10-19
ALL ú ú 01 Page 401 ú Jun 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
(4) S 434-005Put the O-ring on the thimble.
(5) S 424-006Move the expanding body over the thimble and against the O-ring and push the O-ring into the groove.
(6) S 034-007Use the extracting rod to remove the expanding body from the thimble.
(7) S 034-008Remove the thimble.
S 024-010
CAUTION:_______MAKE SURE THE O-RINGS DO NOT HAVE PINCHES. MAKE SURE THE BOLTS AND FITTINGS ARE CORRECTLY ATTACHED. IF NOT, FAILURE COULD OCCUR.
(8) Examine the O-ring for twists and pinches caused by installation.
(a) Align the O-ring to remove twists and pinches.
O-Ring Installation
Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-10-19
ALL ú ú 01 Page 402 ú Mar 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
ELECTRICAL BONDING - REMOVAL/INSTALLATION
_________________________________________
TASK 20-10-21-904-009
1. Electrical Bonding - Removal/Installation_________________________________________
A. General
(1) Refer to SWPM 20-20-00, Electrical Bonding and Grounding, in the Standard Wiring Practice Manual, D6-54446.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-10-21
ALL ú ú 01 Page 401 ú Dec 20/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機維護手冊 STANDARD PRACTICES - AIRFRAME(67)
