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Peterbilt 320 - Page 145

Peterbilt 320
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PART 8: MAINTENANCE AND SERVICE
PB1319 (CAT. NO. 5296 ) —143— 22-01691 (R02/02)
Refilling Your Radiator
1. Be sure the radiator and engine block drains are closed.
2. Move the heater control to maximum heat position.
3. Fill first through the auxiliary fill port on the radiator by removing
the plug.
4. Fill next through the remote tank.
5. When the auxiliary fill port is full, replace the plug.
6. Start the engine and idle at low RPM.
7. Continue filling through the remote tank until the coolant reaches
the tip of the internal tube.
8. Idle the engine until it reaches normal operating temperature.
9. Shut off the engine and wait until the engine has cooled. Recheck
the coolant level; add coolant as necessary.
Check the coolant level after each trip when the engine has cooled.
Add coolant as necessary. You may find your coolant level is not up
to the correct level soon after you have filled the radiator. This may be
because all the trapped air in the system has not yet been purged. It
takes a little time for all the air to leave the system after you fill your
radiator.
Electrical
CAUTION: Never install 100% antifreeze for top-up cool-
ant. It could damage your vehicle.
NOTE: If frequent topping up is necessary and there are no
visible signs of coolant leaks when the engine is cold, check
for leaks with the engine operating at normal operating tem-
perature.
NOTE: Do not overfill a cooling system. Excess coolant
may result in overflow, loss of antifreeze, and reduced corro-
sion protection. For a cold engine, the proper coolant level is
1 in. below the radiator cap seal. For an operating engine at
normal temperature, coolant should be even with the radia-
tor cap seal.
CAUTION: Do not modify or improperly repair the vehicle’s
electrical system or power distribution box. All electrical
repairs should be performed by a qualified service techni-
cian. Improper repair or modifications will void your war-
ranty and/or cause serious damage to your vehicle.

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