Torque for Reduced-Head Bolts
Figure 204
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-51-01
ALL ú ú 02 Page 208 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
C81278
A
747-400
MAINTENANCE MANUAL
NAS591 NAS594
NAS592
NAS593
NAS591 NAS596
NAS595
NAS593
NAS592
CONNECTION ASSEMBLY (REF) CONNECTION ASSEMBLY (REF)
TUBE OD (INCHES) ALUMINUM ALLOY FITTINGS NAS591-593 TORQUE (POUND-INCHES) STAINLESS STEEL FITTINGS NAS594-596 TORQUE (POUND-INCHES)
MINIMUM MAXIMUM MINIMUM MAXIMUM
2-1/2 1-1/4 1-1/2 1 2 4 3 1500 480 600 600 900 1200 1800 720 900 900 1800 1800 2400 900 480 600 600 1200 2100 2100 2700 900 720 900
Standard Torque Values for Rigid Tube Coupling Connectors
Figure 205
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-51-01
ALL ú ú 02 Page 209 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
C81302
A
747-400
MAINTENANCE MANUAL
(INCHES) SIZE PIPE THREAD STEEL TO STAINLESS STEEL ALL PIPE EXCEPT STAINLESS STEEL PIPE FITTINGS STAINLESS STEEL TO STAINLESS
WORKING TORQUE MAXIMUM TORQUE TORQUE (LB-INCHES)
(LB-INCHES) (LB-INCHES) MIN MAX
1/2 1 3/4 3/8 1/4 1/8 225 150 100 450 300 175 100 100 100 200 150 100 400 275 150 800 600 500
Standard Torque Values for Pipe Thread Fittings
Figure 206
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-51-01
ALL ú ú 02 Page 210 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
TUBE FITTING TORQUE 1 TORQUE 2
OD NUT SIZE (POUND-INCHES) (POUND-INCHES)
(INCHES)
1/4 -4 110 65
5/16 -5 140 90
3/8 -6 170 130
1/2 -8 280 260
5/8 -10 360 360
3/4 -12 450 500
1 -16 750 700
1-1/4 -20 900 900
1-1/2 -24 900 900
2 -32 2000
THE TORQUE VALUES ARE APPLICABLE TO:
(1)
FLARED ALUMINUM TUBE ENDS
(2)
FLARELESS ALUMINUM TUBE ENDS WITH BACS13BD OR BACS13BX SWAGED SLEEVES
(3)
FLARELESS TYPE HOSE END FITTINGS WITH ALUMINUM INSERTS
(4)
STANDARD MS FLARELESS TUBE ENDS ON 6061-T6 ALUMINUM TUBING AND ON ANNEALED CRES TUBING. ANNEALED CRES TUBING IS IDENTIFIED BY A WIDE YELLOW BAND ADJACENT TO THE TUBING-USE IDENTIFICATION CODE MARKINGS.
2 THE TORQUE VALUES ARE APPLICABLE TO FLARED HOSE END FITTINGS WITH ALUMINUM INSERTS.
____THE TORQUE VALUES ARE APPLICABLE TO ALL WALL THICKNESSES FOR A GIVEN DIAMETER TUBE AND
NOTE:
HAVE A |5% TOLERANCE.
Standard Torque Values for Low Pressure and Return Line Fittings
Figure 207
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-51-01
ALL ú
ú 02 Page 211
ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
TUBING SIZE (INCHES) (POUND-INCHES, |5%) INSTALLATION TORQUE ON FLARELESS TUBING FITTINGS/BOSSES 3 4 NOTE:____ YOU MUST USE CARE WHEN YOU SELECT THE CORRECT TORQUE FOR REDUCER FITTINGS. YOU MUST FIND THE CORRECT FITTINGS INSTALLATION TORQUE FOR THE SIZE OF THE BOSS OR BULKHEAD. 中國航空網(wǎng) www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：747-400 AMM 飛機維護手冊 STANDARD PRACTICES - AIRFRAME(153)
