freightliner CL112 2015, Maintenance Manual

Page: 55 / 180

When installing Breeze Constant-Torque hose
clamps, the clamps must be tightened to the cor-
rect torque. The screw tip of the clamp must ex-
tend about 1/4 inch (6 mm) from the clamp hous-
ing, and the Belleville washer stacks must be
collapsed almost flat. Use a torque wrench to
install these clamps correctly. The correct instal-
lation torque is as follows:
For Breeze Constant-Torque clamps with a 5/16-
inch tightening screw hex:
55 lbf·in (620 N·cm).
For Breeze Constant-Torque clamps with a 3/8-
inch tightening screw hex:
90 lbf·in (1020 N·cm).
NOTE: All hose clamps will lose torque after
installation due to "compression set." However,
when correctly installed, Breeze Constant-
Torque clamps will hold enough torque to auto-
matically adjust and keep consistent sealing
pressure. During vehicle operation and shut-
down, the screw tip may adjust according to
temperature and pressure changes. The torque
may need to be adjusted for individual applica-
tions.
11. Place a pan under the coolant filter to catch en-
gine coolant.
12. Remove the coolant filter with a strap or chain
wrench. Install a new coolant filter and tighten.
IMPORTANT: On vehicles with EPA07 compliant
engines, the coolant capacity varies depending
on the engine and accessory installation. After
servicing the cooling system, always verify that
the coolant level is between the MIN and MAX
lines on the surge tank.
13. Fill the cooling system with new coolant. Refer to
the engine manufacturer’s service literature for
specific coolant information.
14. Replace the surge tank cap(s).
15. Return the hood to the operating position.
16. Start the engine and turn on the cab heater.
Allow the engine to warm up to normal operating
temperature. Check the radiator and hoses for
leaks. Repair as needed.
17. Shut off the engine, then check the coolant level
in the surge tank. Add coolant if the level isn’t
between MIN and MAX lines on the surge tank.
20–03 Fan Clutch Check (Noise
Emission Control)
Horton Advantage® Fan Clutch
NOTE: If any part of the fan clutch needs to be
repaired or replaced, after performing the
checks below, see
Group 20 of the Columbia®
Workshop Manual .
1. Disconnect the batteries at the negative termi-
nals. Drain all air from the air system. If
equipped with an air starter, drain the air starter
reservoir.
f200326 10/05/2016
Fig. 3, T-Bolt Type Hose Clamp
f200286 10/05/2016
A
B
1
A. The screw tip must extend about 1/4 inch (6 mm).
B. Belleville washers must collapse almost flat.
1.
Tightening Screw Hex
Fig. 4, Breeze Constant-Torque Hose Clamp Installation
Engine Cooling/Radiator
20
Columbia Maintenance Manual, September 2015
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