Union Assemblies Figure 269/TASK 20-23-11-991-068
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Tubing Repair Figure 270/TASK 20-23-11-991-069
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(b) Method 2: You cut through the center of the defect.
NOTE : This is not the best method because, in some conditions,
____ the defect can cause damage to the sealing surface of the union. If you use this method, you must be careful:
-
to cut the tube in the center of the defect
-
to put the union in the center between the installation marks.
(2)
Two-union repair
(a) You must use a two-union repair when the length of the defect is more than the specified limits (L max). You remove (cut out) the part of the tube that has the defect. There is a minimum length of tube (M min) that you must remove. You replace the removed part of tube with:
-an equal or smaller (but nearly the same) length of equivalent tube
-two RYNGLOK unions.
(3)
Swage near a bend There must be a minimum length (N min) of straight tube to swage near a bend.
Subtask 20-23-11-917-080
C. Preparation
(Ref. Fig. 271/TASK 20-23-11-991-070)
(1)
Cut the tube. We recommend a chipless roller-type cutter.
(2)
Make sure that the tube ends have no burrs (inner and outer side). Deburr if necessary. Use an applicable deburring tool to prevent damage or contamination of the fluid system.
(3)
Preparation of the painted tube ends It is necessary to remove paint from a minimum length (Dim. B) at the ends of the painted tube.
(a) Remove paint with grade 400 emery cloth along the dim. B. Make sure that you do not cause scratches on the tube when you remove the paint.
(4)
Make sure that all the tube ends are in the correct condition and agree with the tube dimension specifications (Ref. TASK 20-23-11-200-001).
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Tube End Dimension and Marking Figure 271/TASK 20-23-11-991-070
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(5) Clean all the tube ends with a MISCELLANEOUS (Material No. 19-003) and CLEANING AGENTS (Material No. 11-003).
NOTE : Make sure that the cleaning agent does not go in the tube.
____
(6) Make the marks on the tubes.
(a) Get the correct size marking gage (Ref. Fig. 268/TASK 20-23-11-991-067)
1_ Put the applicable marking gage on each tube end. With a
permanent-ink felt-tipped pen, make the position and the
inspection marks through the gage windows.
Subtask 20-23-11-917-081
D. Union Installation (Ref. Fig. 272/TASK 20-23-11-991-071)
(1)
Put the union in position:
(a) Move the union on the tube ends and put the edge of the unswaged ring on the position mark. The edge of the ring must be between the two ends of the position mark. The length of the position mark gives the permitted tolerance for the position of the ring.
(2)
Union assembly
(a) Get the correct size tool. (Ref. Fig. 268/TASK 20-23-11-991-067)
NOTE : The color code of the coupling ring must agree with the
____ color of the movable jaw on the swaging tool.
(b)
Connect the flexible hose between the pump and the swaging tool.
(c)
Align the assembly tool to one leg of the union, with the ring in the movable jaw of the tool and the front opening of the tool against the union body.
NOTE : When you use the reversed tool, the union body is in the
____ tool jaw and the front opening is against the ring.
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Union Installation Figure 272/TASK 20-23-11-991-071
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NOTE : When you use size -20 and -24 swage tools, make sure that
____ the swage bridge (connected to the tool by a lanyard) is in the correct position:
-
the arrow on the swage bridge must point to the front of the tool,
-
the swage tool detents must hold the swage bridge when the union is engaged in the tool (the swage tool detents make a click when the swage bridge becomes flush on the top of the tool).
NOTE : For the standard swage tool, you must engage the swage
____ bridge in the tool body. For the reversed tool, you must engage the swage bridge in the movable jaws.
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