TM 5-3805-291-23-2
TORQUE LIMITS - CONTINUED
0234 00
HOSE CLAMPS - CONTINUED
Constant Torque Hose Clamps
427-C2083
Use a constant torque hose clamp instead of any worm drive band type clamp. Ensure constant torque hose clap is the
same size as worm drive band type clamp. Because of extreme temperature changes, hose will heat set. Heat setting can cause
worm drive band type clamps to become loose. Loose hose clamps can result in leaks. There have been reports of component
failures that have been caused by loosened worm drive band type clamps. Constant torque hose clamp will help prevent these
failures.
Use a torque wrench for proper installation of all constant torque hose clamps. There are two types of constant torque
hose clamps: Belleville washer (1) and T bolt and spring (4).
When constant torque hose clamp of Belleville washer (1) is assembled correctly, Belleville washers (2) are nearly col-
lapsed flat. The proper torque for screw (3) is based on diameter (B) of clamp. Refer to the following table for the correct
torque.
Diameter (B)
Standard Torque
2 in. (Up to 50.8 mm)
65 5 lb-in. (7.3 0.6 Nm)
2 in. (Greater than 50.8 mm)
95 10 lb-in. (11 1 Nm)
The correct torque for constant torque hose clamp (T bolt and spring) (4) is 60 10 lb-in. (7 1 Nm).
END OF WORK PACKAGE
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