Oetiker Screw Clamps; Constant-Torque Hose Clamps On Charge Air Cooler (Cac) System - PREVOST H3-41 Maintenance Manual

SECTION 05A: H3 SERIES COOLING SYSTEM
FIGURE 8: COOLANT LINE AT THE RADIATOR OUTLET
FIGURE 9: COOLANT LINE AT PUMP INLET
FIGURE 10: COOLANT LINE AT PUMP INLET
4.1.1

Oetiker Screw Clamps

FIGURE 11: OETIKER CLAMP (image: oetiker)
Assembly recommendations
1. Turn screw anti-clockwise until it stops at the
"D" nut.
2. For radial installation or change of diameter,
unlatch the interlock.
12 PA1621 Maintenance Manual All Series | January 2017
3. Position the open clamp around the hose.
Locate the tongue in the groove and position
the apertures of the mechanical interlock
over the mating features. Engage the
interlock at the smallest possible diameter.
4. Tighten the screw to the required torque:

Spring without color identification
TORQUE: 8-9 lb-in (0.9-1.02 Nm)

Green spring
TORQUE: 12-18 lb-in (1.36-2.03 Nm)
5. A gap of 3 mm should exist between the D-
nuts. This ensures that there is sufficient
movement for the clamp to reduce in
diameter when
spring of the
tensioning clamp
expands during
contraction of the hose.
If the gap between the
D-nuts is less than the
recommended 3 mm, proceed to step 6.
6. Turn the screw anti-clockwise to loosen the
Self-Tensioning Screw Clamp.
7. Relocate the interlock in the next smaller
diameter position.
8. Tighten the screw to the required torque.
4.2 CONSTANT-TORQUE HOSE CLAMPS
ON CHARGE AIR COOLER (CAC)
SYSTEM
If for any reason hose clamps need to be
replaced; install and tighten hose clamps to
specified torque (dry) (Figure 12).
TORQUE: 4.5-5.5 lb-ft (6.1-7.46 Nm)
the
self-