TM 10-3930-641-34-2
LINES, PLUGS, FITTINGS TORQUE
(Sheet 3 of 11)
Ermeto Tube Fittings
Put nut and sleeve over the tube with head or shoulder end of sleeve next
to nut. Push tube into counterbore of fitting body as far as possible. Turn nut
clockwise until sleeve holds tube and prevents movement. Tighten the nut
11/4 turns more to seat sleeve and give a locking action. When necessary to
assemble again, put sleeve over tube and tighten nut until a sudden increase
in torque is felt. Then tighten 1/6 to 1/3 turn more to seat the sleeve.
Flex Fittings
Put nut and sleeve over tubing and push tube into counterbore of fitting
body as far as possible. Tighten the nut until it is against 'he hex part of the
fitting body.
Hi Duty (shear sleeve)
Tube Fittings
After tube has been put through the nut and makes contact against the
tube shoulder in the fitting body, turn the nut with a wrench until a small
decrease in torque is felt. This is an indication that the sleeve has been
broken off of the nut. Hold the tube to prevent turning and tighten the nut I
and 1/2 turns.
Hi Seal Fittings
Put nut and sleeve over the tubing with the short heavy end of the sleeve
facing the end of tubing. Put the tube end against the counterbore in the body
of the fitting and tighten until nut is over the last thread on the body. The
remainder of space is used whenever the fitting is removed and installed
again.
Go on to Sheet 4
D-3
