freightliner Argosy COE Maintenance Manual page 44

Engine Cooling/Radiator
CAUTION
When flushing the radiator, do not apply more
than 15 psi (100 kPa) air pressure. Excessive pres-
sure can damage the radiator.
7. Gradually, apply air pressure to help dislodge
sediment built up in the radiator core. Do not
apply more than 15 psi (103 kPa) air pressure to
the radiator. Pressures exceeding 15 psi (103
kPa) could damage the radiator core.
8. Shut off the air at the pressure gun nozzle and
allow the radiator to refill with water.
9. Repeat the previous two steps until clean water
flows from the radiator.
10. On Century Class Conventionals, remove the
radiator side tank drain plug and allow the radia-
tor to drain. Install and tighten the side tank drain
plug and the radiator outlet pipe drain plug after
the radiator has been drained. Do not overtighten
the plugs.
11. Connect the hoses. Your hose clamps can be
either T-bolt clamps (see
Constant-Torque clamps (see
When working with T-bolt hose clamps, tighten
the clamps 55 lbf·in (620 N·cm). These clamps
are now standard on hoses with an inside diam-
eter greater than 2 inches (51 mm).
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 hose clamps correctly. The correct
installation 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
Century Class Trucks Maintenance Manual, January 2007
Fig. 4) or Breeze
Fig. 5).
02/28/96
Fig. 4, T-Bolt Type Hose Clamp
A
08/15/94
A. The screw tip must extend about 1/4 inch (6 mm).
B. Belleville washer stacks must be collapsed almost
flat.
1. Tightening Screw Hex
Fig. 5, Breeze Constant-Torque Hose Clamp Installation
temperature and pressure changes. The torque
may need to be adjusted for individual applica-
tions.
12. Place a pan under the coolant filter to catch en-
gine coolant.
13. 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.
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