TM 55-1520-240-23-6
7-5
REPAIR PERMASWAGE PLUMBING
(Continued)
7-5
23.
Connect the hydraulic pressure line from portable
hydraulic power supply to fitting on base of
swaging tool.
24.
Set selector valve on power supply to EXHAUST
to relieve all line pressure.
If you do not tighten the knurled nut
against the yoke, the yoke assembly
will fail. You may need to rotate the
yoke 180º to obtain a snug fit.
24.1.
Slide square portion of power unit into yoke
assembly. Tighten knurled nut snugly against
yoke.
25.
Install set of die blocks in swaging tool. Position
tool below level of power supply. These steps will
prevent air from getting in the hose and power
supply. Cycle power supply to 2000 psi followed
by EXHAUST, two or three cycles to bleed air
from cylinder.
NOTE
Some separable fittings are swaged
without locators.
26.
See chart of swage tool envelopes to select
correct upper and lower die block assemblies
for size of fitting to be swaged. Insert lower die
block with correct fitting locator into tool. When
properly inserted, filling locator is on opposite
end of tool relative to latch.
27.
Place swaging tool and dies over separable
fitting. Make sure fitting is positioned properly.
Refer to figure showing acceptable limits of tube
insertion into union. Push up latch to lock dies
in place.
28.
Position face of swaging tool against location
mark on tube. Outer edge of latch must fall within
location mark. Tube insertion must be as shown
in illustration of tube insertion limits.
29.
Set selector valve to appropriate hydraulic output.
30.
Actuate swaging tool with 5,000 to 5,500 psi
hydraulic pressure. If shop air input is not
available, use hand pump.
31.
Set selector valve to EXHAUST to relieve
pressure completely.
32.
Slide open latch and remove swaging tool from
swaged joint.
7-37
