(b)
Using the cooled tongs, remove the Cryofit installation package from the liquid nitrogen and grasp the package between thumb and forefinger.
(c)
Deflect the tube without the installation stop to allow the coupling to be slipped over the tube end.
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757 MAINTENANCE MANUAL
(d)
Slip the coupling on to the tube, realign the tubes and slide the coupling against the installation stop.
(e)
Ensure that the Cryofit coupling is against the installation stop and that the fitting is in correct position relative to the installation marks.
(f)
Allow the coupling to warm and shrink on to the tube. Remove the Cryofit installation package and the installation stop.
(g)
Verify that both ends of the coupling lie within the installation marks on both tubes.
NOTE: If one or both ends of the fitting do not cover a
____ portion of the installation mark, the installation is incorrect and must be replaced.
TASK 20-10-09-408-302
9. Install the Permaswage Fittings
_______________________________
A. General
(1)
To do the Permaswage repair procedure, use the D12000 or DLT series swaging tool and the BACU24BS or D10282 in-line tube unions (sizes 04, 06, 08, 10, 12, and 16). You can use CRES Permaswage fittings, as shown in Fig. 824 and Fig. 802, with 304-1/8 hard CRES tube to repair Ti-3AL-2.5V and 21-6-9 CRES. Repair 6061T6 aluminum tubing with aluminum Permaswage fittings with D suffix in the basic part number.
(2)
When you do a repair, remove the part of the tube with the defect. Put in a tube splice and install the splice with two fittings. Fittings and tubing material sizes are shown in Fig. 824.
(3)
When you remove tubes, make sure the tubes and port fittings have tags that identify the correct connection locations.
(4)
The splice must be shorter than the removed tube section. At a maximum length, make the splice shorter than the tube section by four times the growth value shown in Fig. 827 (four fittings). This permits an increase in length as a result of swaging. As a minimum length, make the splice longer than 0.300 inch less than the cut-out. This permits tube gaps (not more than 0.150 inch) as shown in Fig. 827.
NOTE: Include the length growth caused by swaging when you work
____ with short tube sections with small flexibility. Short tube sections or tube repairs between rigidly installed fittings can buckle.
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B. Equipment
(1)
Deutsch Permaswage kit - #D12102C03-01A00 for
sizes 04 & 06 (1/4" & 3/8"), #D12102C06-26A00
for sizes 08, 10 & 12 (1/2", 5/8" & 3/4"),
#D12102C11-04 for size 16 (1"). One pump, part
#D12025-001, is required for swaging with the
tool kits listed. (Deutsch Metal Components,
P.O. Box 61188, 14800 S. Figueroa St., Los
Angeles, California 90061)
(2)
Deutsch Permaswage Lightweight series (DLT Series) - Tool numbers are listed in Fig. 825. You can get tool kits in different size combinations. Contact Deutsch for tool kit part numbers. Make sure that the DLT Series tooling has been inspected to the following Deutsch Tooling Control Documents:
MCP-016 - Inspection Criteria of Deutsch MC, DLT Series, Swage Head Assembly - Standard Permaswage, 3,000 psi Application
DAP-10-00-01 - Assembly, Disassembly, Inspection and Testing of DLT Swage Tools
One pump is required to actuate the power units, as shown in Fig. 825. (Deutsch Metal Components, P.O. Box 61188, 14800 S. Figueroa St., Los Angeles, CA 90061)
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