B.
Procedure
S 948-300
(1)
Get the necessary tools as listed in the operating instruction manual supplied with the Harrison Roller Swage Tube Repair Kit.
S 358-301
(2)
Apply the specified torque to the expander mandrel (Fig. 817).
S 228-302
(3)
After you swage, make sure the BACS13BX sleeve and tube agree with the specifications of Fig. 817
NOTE:____Do not trim the tube after you roller swage. If it is necessary, remove burrs with an approved deburring tool.
S 218-303
(4)
Make sure the seal areas of the sleeves are not scratched or damaged during fabrication. Make sure each seal area keeps the 63 RHR (no annular tool marks) finish specifications of its standard.
S 228-304
(5)
Make sure the die marks on the external skirt and shoulder areas of the sleeves are not more than 0.002 inch in height. Also, make sure the die marks to not touch the nut.
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20-11-05
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 218-305
(6) Make sure the tube inner surfaces at the swage area do not have scratches or marks caused by defective rollers.
TASK 20-11-05-308-426
5. Titanium Hydraulic Tubing, 3000 psi - Roll Swaging Harrison 35211 Sleeves and 35212 Unions using the Harrison 6777 Swage Machine.
NOTE: This procedure does not apply to repair of aluminum and cres tubing.
____
A. General
(1) The sleeves, unions, and nuts used for this procedure are listed in (Fig. 802 and Fig. 805).
B. Do the procedure:
S 308-425
(1)
Cut and chamfer tubes as shown in (Fig. 804) and to length requirements in (Figures: 805-810) as applicable. Correct for swage growth according to data provided in the manufacturer's operating manual.
S 118-427
(2)
Clean the tube with Methyl Ethyl Ketone or an equivalent cleaning agent and blow air through the tube to remove particles.
S 328-430
(3)
Use swage dies as illustrated in (Fig. 813).
S 828-431
(4)
Use Swage Torques as shown in (Fig. 817).
S 218-429
(5)
Make sure that there are no scratches or other damage on the seal areas of the sleeve and union.
S 788-428
(6)
Conduct a Proof Pressure Test of the tube assembly:
(a)
Connect the Harrison sleeve and union of the tube assembly and torque it to the specified value.
(b)
Pressurize the tube to 6000psi pressure.
(c)
There shall be no leakage in proof testing.
(d)
If there is leakage, loosen and retighten the fitting. If leakage persists remove the tube and inspect tube end and test fittings for defects.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-11-05
ALL ú ú 03 Page 813 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
TASK 20-11-05-308-306
6. Preset the BACS13AP Flareless Sleeves_____________________________________
A. General
(1)
We recommend you pressure preset and do not preset by hand. If you must preset by hand, we recommend you preset some samples first. Then you can preset the section to repair. On samples, cut away the sleeve to make sure the ring cut on the tube makes a circle around the tube circumference and has a depth of 0.002 inch.
B.
Equipment
(1)
Cherry Lockbolt Gun used with hand presetting
tool - Model G87D is the preferred tool and
Model G85D is optional (Textron Aerospace
Fasteners, Cherry Div., 1224 East Warner Ave,
Box 2157, Santa Ana, California 92707)
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