TM 1-1520-238-23
7-431
7.113.
HYDRAULIC TUBES AND FITTINGS PERMASWAGE REPAIR – continued
b. Lightly lubricate plug (10). Use clean hydraulic
fluid (item 92, App F).
c. Press plunger (11). Carefully insert stem into
tube (6) until cutter (12) is approximately 0.125
INCH away from burr. Release plunger (11) to
allow plug (10) to expand and seal tube.
d. Rotate knurled body (13) of deburring tool
clockwise while applying slight pressure to
cutter (12). Continue to rotate until cutter (12)
turns smoothly, indicating tube end is deburred.
Do not cut too deep into wall of tube. Width of
deburring chamfer shall not exceed 1/2 wall thick-
ness of tube.
e. Without pressing plunger (11), pull tool (8)
from tube (6) until first bulge (14) of plug (10)
is exposed. Wipe off tube (6) and plug (10). In-
spect tube end for proper deburring. Repeat step
d if necessary.
f. Remove tool (8) from tube (6). Clean all chips
from tube (6) and tool (8). Clean all oil and grease
from end of tube (6) (para 1.47).
7.113.8. Prepare Replacement Tube
a. Select piece of tube of correct length. Tube
shall be same size and material as that being
replaced.
b. Bend replacement tube to shape of original
tube, leaving some excess for trim at both
ends. Remove all burrs.
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