TM 1-1500-204-23-9
(3)
Double-flaring tool. To form a double
flare in a tube, proceed as follows:
(a)
Select the proper size die blocks
and place one half of the die block into the tool body
with the countersunk end towards the ram guide.
(b)
Install the sleeve (MS20819) and
the nut (AN818) on the tube, and lay the tube in the die
block with 1/2 inch extending beyond the countersunk
end.
(c)
Place the other half of the die block
into the tool body and clamp it tightly.
(d)
Insert the upset flare punch in the
tool body.
(e)
Insert the ram and tap lightly with a
hammer or mallet until the upset flare punch contacts
the die blocks.
(f)
Remove the upset flare punch and
reinstall in the reverse position. Install the ram and tap
lightly until the upset flare punch contacts the die blocks.
(g)
Remove the upset flare punch and
the ram.
(h)
Insert the finishing flare punch and
the ram.
(i)
Tap the ram slightly until a good
seat is formed.
NOTE
Check the flare at intervals during the finishing
operation to avoid overseating.
(4)
Inspection. Inspect completed flares by
pushing sleeve onto flared end. The flare should extend
1/16 inch beyond the end of the sleeve, but the outside
diameter of the flare will not be larger than the largest
outside diameter of the sleeve.
c.
Care. Observe the following practices for the
care and upkeep of flaring tools:
(1)
Keep surfaces clean and lightly oiled.
(2)
Close single-flaring tools and tighten the
cone into the die block for storage.
(3)
Keep double-flaring tools in their cases
when not in use.
4-26. Tube Beading Tool. Tube is beaded when it will
be joined with flexible hose. The beading provides a
sealing surface against which the hose is pressed.
Beading may be accomplished on machine beaders, or
with the hand-beading tool. The hand-beading tool is
the most common beading tool used in the maintenance
of Army aircraft. A typical hand-beading tool set is
shown in figure 4-123.
a.
Use. The hand-beading tool is used with tubing
having 1/4 to 1 inch outside diameter. The bead is
formed by using the beader frame with the proper rollers
attached. It is important that the proper rollers are used
for a specific size of tubing. The operation of the tube
beading tool is shown in figure 4-124. The general
procedures are as follows:
(1)
Lubricate the inside and the outside of
the tube with light oil to reduce the friction between the
rollers during beading.
(2)
Install the tool on the tube as shown in
figure 4-124.
(3)
As the tool is rolled around the tube,
intermittently screw down the roller until the desired
bead dimension is obtained.
NOTE
In some kits, a small vise or tube holder
is included to hold the tube steady and
ensure an even bead all the way around
the tube end.
b.
Care. Observe the following practices for the
care and upkeep of the tube beading tool:
(1)
Ensure that the rollers are clean and
free of dirt and grit.
(2)
Apply a light coat of oil to prevent rust.
(3)
Lubricate roller axles with a drop of oil.
4-51
