WARNING: SLOWLY AND CAREFULLY SUBMERGE WARM ITEMS IN LIQUID NITROGEN TO
_______ PREVENT RAPID BOILING OFF AND SPLASHING. MISSUSE OF LIQUID NITROGEN CAN CAUSE INJURY TO PERSONS.
 (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.

 (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.

 (4)  
Ensure that the Cryolive flareless sleeve assembly is installed so that the joint is not subjected to axial preload during final torquing of the joint.

 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).

 (4)  
Work Box, Insulated (available from Advanced Metal Components, Incorporated by P/N WB910825-01).

 (5)  
Safety Glasses (commercially available).

 (6)  
Face Shield (commercially available).

 C.
Consumable Materials

 (1)  
G00262 Liquid Nitrogen

 (2)  
B01000 Solvent - General Cleaning of Metal (Series 80)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 D. Procedure
 S 868-311
 (1)  
Remove pressure from the system where you will do repairs and allow the hydraulic fluid to drain into a suitable container.

 S 218-312

 (2)  
Make sure that the tube end where you will install the Cryolive flareless sleeve assembly is round, smooth and free of scratches and burrs.

 S 118-313
 WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON YOUR
_______ SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. SOLVENTS MAY BE FLAMMABLE OR HARMFUL TO THE ENVIRONMENT. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
 (3)  Use solvent, Series 80 (AMM 20-30-80/201) to clean the tube in the area where you will install the Cryolive flareless sleeve.
 S 948-314
 WARNING:_______USE EXTREME CAUTION WHEN USING LIQUID NITROGEN. THE TEMPERATURE OF LIQUID NITROGEN IS 320 DEGREES BELOW ZERO. PROVIDE PROPER VENTILATION AS LIQUID NITROGEN VAPORS CAN DISPLACE OXYGEN IN CONFINED AREAS. USE SAFETY GLASSES, A FACE SHIELD, AND INSULATED GLOVES WHEN USING LIQUID NITROGEN. MISSUSE OF LQUID NITROGEN CAN CAUSE INJURY TO PERSONS.
 (4)  
Put on insulated gloves, safety glasses, and face shield.

 S 948-315

 (5)  
Put liquid nitrogen BB-N-411, Type II, MIL-P-27401, Type II
 (-320 °F), into a small, insulated container.

 S 948-316
　
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