NOTE: These marks will be used for the last inspection check
____ (dimension "C").
 S 428-270
 (8)  
Install the coupling assembly over the coupling side of the tube.

 S 218-271

 (9)  
Make sure the large radius and the large diameter end of the sleeve are toward the center of the union.

 S 438-272

 (10)
 Install the nut and sleeve over the tape on the nut side of the tube.

 S 218-273

 (11)
 Make sure the sleeve large bore is toward the clearence.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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757
MAINTENANCE MANUAL

 S 828-274
 (12)
 Align the tubes and move the union until it touches the tape on the nut side on the tube.

 S 218-275

 (13)
 Make sure the union meets or covers the index line on the coupling side of the tube.

 S 948-276

 (14)
 Install tape on the coupling side of the tube, with the tape edge even with the end of the union.

 S 438-277

 (15)
 Push the sleeve and coupling body on the ends of the union.

 NOTE: Make sure the tape does not move and the coupling body
____
 does not turn.

 S 838-278
 (16)
 Engage the threads of the nut with the coupling body and tighten the nut handtight.

 S 438-279

 (17)
 Hold the coupling body with a wrench and tighten the coupling assembly nut to the stop.

 S 218-280

 (18)
 Examine the completed repair to make sure you can see the two marking dots (Fig. 822). If you cannot see the two dots, this shows that the sleeve and coupling are not fully seated against the center land of the union.

 S 218-281

 (19)
 Make sure dimension "C" did not increase.

 S 208-282

 (20)
 Do an inspection as follows:

 (a)  
Remove the nut.

 (b)  
Make sure the slide and coupling are no more than 0.015 inch from the union shoulder.

 (c)  
Make sure the union touches the tape.

 (d)  
If the clearance between the slide or coupling and the union is more than 0.015 inch, install the nut and tighten it until you get the necessary clearance (Fig. 822).

 (e)  
Install the nut again and tighten the nut to the necessary torque value.

 (f)  
If the union does not touch the tape, you must remove the coupling and a sufficient tube length. Install a new repair section.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 TASK 20-10-09-408-283
 8. Install the 3P02111 or 3PHS111 coupling. (Fig./823)
 A. General
 (1)  The Cryofit coupling is a fitting which you can use to repair Ti-3AL-2.5V tubing as shown in Fig. 802. To install the fitting in a straight section, shrink fit it in its position.
 B. Equipment
 (1)  
Cryofit repair kit - FRK3P02111-001 (Aerofit
 Products, Inc. 6460 Dale Street, Buena Park,
 California 90621).

 (2)  
(commercially available) Safety Glasses

 (3)  
(commercially available) Face Shield

 C. Consumable Materials
 (1)  
G00262 Liquid nitrogen

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

 (3)  
A00558 Loctite 290

 (4)  
G00270 Masking Tape

 D. Procedure ú ú S 868-366 ú         ú
WARNING:_______DO NOT USE CRYOFIT COUPLINGS ON ANY OXYGEN LINES OR ON FLUID ú LINES INSIDE THE FIRE ZONES OF ENGINES OR APU'S. DAMAGE TO ú EQUIPMENT OR INJURY TO PERSONS CAN OCCUR. THE CRYOFIT COUPLING ú IS NOT QUALIFIED FOR THESE APPLICATIONS. ú
　
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