TM 5-3895-383-24
Put the nut and the sleeve over the tube. The head of the
sleeve or the shoulder end of the sleeve should be next to the
nut. Push the tube into the counterbore of the fitting body as
for as possible. Turn the nut clockwise until the sleeve holds
the tube and until the sleeve prevents the tube from moving.
Tighten the nut for an additional 1-1/4 turns. The sleeve
should be seated and the sleeve should give a locking action.
When it is necessary to assemble the tube fitting again, put the
sleeve over the tube and tighten the nut until a sudden
increase in torque is felt. Next. tighten the fitting for an
additional 1/6 to 1/3 turn in order to seat the sleeve.
Flex Fittings
Illustration 10
Put the nut and the sleeve over the tubing and push the tube
into the counterbore of the fitting body as far as possible.
Tighten the nut until the nut is against the hex part of the fitting
body.
Torques for Standard Hose
Clamps - Worm Drive Band Type
SMCS Code: 7553
Illustration 11
Table 11
Width of Clamp
Initial Installation
Torque On New Hose
7.9 mm (.31 inch)
0.9 0.2 Nm (8 2 lb-in)
13.5 mm (.53 inch)
4.5 0.5 Nm (40 4 lb-in)
15.9 mm (.63 inch)
7.5 0.5 Nm (65 4 lb-in)
Width of Clamp
Reassembly or
Retightening Torque
7.9 mm (.31 inch)
0.7 0.2 Nm (6 2 lb-in)
13.5 mm (.53 inch)
3.0 0.5 Nm (27 4 lb-in)
15.9 mm (.63 inch)
4.5 0.5 Nm (40 4 lb-in)
Torque for Constant Torque Hose
Clamps
SMCS Code: 7553
Use a constant torque hose clamp in place of any standard
hose clamp. Ensure that the constant torque hose clamp is the
same size as the standard hose clamp. Due to extreme
temperature changes, the hose will heat set. Heat setting can
cause hose clamps to loosen. Loose hose damps can result in
leaks. Thee have been reports of component failures that
have been caused by hose clamps that have loosened. The
constant torque hose clamp will help prevent these failures.
Illustration 12
Use a torque wrench for proper installation of the hose clamp
is installed correctly under the following conditions:
Screw tip (1) extends 6.35 mm (.250 inch) (X) beyond the
housing.
The belleville washers are collapsed nearly flat after screw
(2) is tightened to a torque of 11 1 Nm (98 9 lb-in).
4-10
