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

SECTION 05: COOLING SYSTEM
connection that occurs during vehicle operation
and shutdown. These clamps are worm-driven
and made of stainless steel.
All connections equal or greater than 2 inches
OD have doubled clamps (two clamps, side by
side) with screw housing separated from at least
90°. A torque wrench should be used for proper
installation.
TORQUE: 30 lb-in (3,39 Nm)
FIGURE 11: COOLANT FLOW (X3 SERIES SHOWN)
CAUTION
The hose clamps will break if over-torqued.
Do not over-tighten, especially during cold
weather when hose has contracted.
12
PA1621 Maintenance Manual All Series
FIGURE 12: CLAMP TYPE USED ON HEATING &
COOLING SYSTEMS
FIGURE 13: PROPER HOSE CLAMP INSTALLATION
4.2 CONSTANT-TORQUE HOSE CLAMPS
ON CHARGE AIR COOLER (CAC)
If for any reason hose clamps need to be
replaced; install and tighten hose clamps to
specified torque (dry) (Figure 14).
TORQUE: 4.5-5.5 lb-ft (6.1-7.46 Nm)
IMPORTANT: The two constant torque clamps
used at the CAC to intake manifold elbow must
be torqued differently on the X3 Series (see
torque table for proper identification).
TORQUE: 12-15 lb-ft (16-20 Nm)
Elbow V-clamps must also be torqued to
specification.
TORQUE: 4.5-6 lb-ft (6.1-8.13 Nm)
CAUTION
The hose clamps will break if over-tighten. Do
not over-tighten,
weather when hose has contracted.
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Section 05 revised Feb 2019
especially during cold