S 358-247
(2) To preset the sleeve by hand do the following:
(a) Use the correct mandrel for the preset tool ST879A (Fig. 819).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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757 MAINTENANCE MANUAL
(b)
Lubricate the threads, sleeve shoulder, and conical seal area of the fitting. Do not lubricate the tube.
(c)
Assemble the sleeve on the tube. Insert the tube into the tool ST879A union. Tighten the nut as shown in Fig. 821.
(d)
If the ST879A preset tool is not available, you can preset the sleeves with a carbon steel union and nut as shown in procedure A or B of Fig. 821.
S 228-248
(3) After you preset, make sure the BACS13AP sleeve and tube joint have the following properties (Fig. 820):
(a)
Corrosion resistant steel tubing (MIL-T-6845):
Make sure the sleeves have a maximum of 0.005 inch longitudinal end play. Make sure the sleeves do not turn freely on the tube under finger pressure (without the use of force).
(b)
Annealed corrosion resistant tubing (MIL-T-8504 and MIL-T-8808) and aluminum alloy tubing (MIL-T-7081 or WW-T-700/6):
Sleeves can have 0.015 inch maximum longitudinal end play and turn on the tube under finger pressure.
(c)
These conditions apply to all tubing materials: 1) Make sure the tube inner diameter does not decrease more than 0.005 inch (Fig. 820). 2) Make sure the sealing surface of the sleeve bow is free of scratches, marks, or other defects.
3) The tube end is permitted to flare if the flare diameter does not prevent entrance of the MS21902 or MS21924 union into the MS flareless fitting end.
TASK 20-10-09-408-249
6. Install the CRYOLIVE Flareless Sleeve Assembly (Fig.______________________________________________832)
A. General
(1) The Cryolive flareless sleeve, shown in Figure 832 and Figure 802, is installed as part of an assembly consisting of the sleeve, a coupling nut and plastic cap that acts as an assembly tool and a protective cover for the tube end until the tube is installed in the airplane. The assembly is stored in liquid nitrogen until ready for use. During installation, the assenbly is removed from the liquid nitrogen, slipped on to the tube end and allowed to warm to room temperature. The sleeve shrink fits into position at the correct distance from the the tube end as it warms to room temperature.
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757
MAINTENANCE MANUAL
(2)
The Cryolive flareless sleeve assembly can be used, as shown in Figure 833 and Figure 802, with 304 1/8 hard CRES, Ti-3Al-2.5V and 21-6-9 CRES tube and 6061-T6 aluminum tube. Titanium coupling nuts (part of Cryolive Assembly 921721T--) or CRES coupling nuts (part of Cryolive Assembly 921721J--) can be used with the Cryolive sleeve on 304 1/8 hard CRES, Ti-3Al-2.5V or 21-6-9 CRES tube. Aluminum coupling nuts (part of Cryolive Assembly 921721W--) and aluminum mating fittings must be used to avoid galvanic corrosion when the Cryolive flareless sleeve assembly is installed on 6061-T6 aluminum tube.
(3)
The coupling nut used with the Cryolive flareless sleeve assembly in Sizes 10, 12 and 16 is longer than the standard MS21921/BACN10-coupling nut in the same sizes and is not interchangeable with the
___ MS21921/BACN10- nuts.
B. Equipment
(1)
Cryolive Flareless Sleeve/Coupling Nut/Protective Cap Assemblies (Advanced Metal Components Incorporated, 1374 Willow Road, Menlo Park, California 94025)
(2)
Tongs (any suitable, also available from Advanced Metal Components, Incorporated by P/N AT911067 -01).
(3)
Insulated Gloves (available from Advanced Metal Components, Incorporated by P/N OE-Glove-Liner, S-M-L or from Damart Corporation, 1811 Woodbury Avenue, Portsmouth, New Hampshire 03805 by P/N 264E).
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