CAUTION
When flushing the radiator, do not apply more
than 20 psi (138 kPa) air pressure. Excessive pres-
sure can damage the radiator or heater core.
4. Drain the radiator, and flush the radiator until
clean water flows from the radiator. Remove the
flushing gun.
5. Close the petcock at the bottom of the radiator.
6. Connect the hoses. Your hose clamps can be
either T-bolt clamps (Fig. 3) or Breeze Constant-
Torque clamps (Fig. 4).
When working with T-bolt type hose clamps,
tighten the clamps 55 lbf·in (620 N·cm). These
clamps are now standard on hoses with an in-
side diameter greater than 2 inches (51 mm).
When installing the Breeze Constant-Torque
hose clamps, the clamps must be tightened to
the correct torque. The screw tip of the clamp
must extend about 1/4 inch (6 mm) from the
clamp housing, and the belleville washer stacks
must be collapsed almost flat. Use a torque
wrench to install these hose clamps correctly.
The correct installation torque for Breeze
Constant-Torque hose clamps is as follows:
For Breeze Constant-Torque hose clamps with a
5/16-inch tightening screw hex:
55 lbf·in (620
N·cm).
For Breeze Constant-Torque hose 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-
f500108a
1
2
11/19/94
1. Radiator 2. Horn
Fig. 2, Draining The Engine Coolant
02/28/96
f200326
Fig. 3, T-Bolt Type Hose Clamp
08/15/94
f200286
A
B
1
A. The screw tip must extend about 1/4 inch (6 mm).
B. The belleville washer stacks must be collapsed
almost flat.
1. Tightening Screw Hex
Fig. 4, Breeze Constant-Torque Hose Clamp Installation
Engine Cooling/Radiator20
Business Class Trucks Maintenance Manual, August 200320/2
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