IC Bus CE Series 2020, Operation And Maintenance Manual

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Maintenance
NOTE: Using the KL5007NAV coolant management tool is
the recommended procedure for filling the cooling system..
However, in some cases this tool may not be available, and
the following gravity-fill procedure may be used instead.
Contact an International dealer for special instructions on
filling the coolant system.
NOTE: This is a traditional gravity-fill-only method that
involves pouring or pumping the coolant into the deaeration
tank of the cooling system and using a combination of
gravity and engine operation to purge the system of
air.
Depending upon your engine configuration, this
method may include the disadvantage of a requirement
to temporarily disconnect the Exhaust Gas Recirculation
(EGR) wiring harness to protect the EGR from heat damage
prior to being completely deaerated (freed of trapped air).
This process may generate a fault code that might require
further investigation by an authorized International dealer.
For vehicles with N9 and N10 engines, see the following
instructions on filling the cooling system.
1. Open any shutoff valve in heater circuit, in-transit heat
circuit, or Auxiliary Power Unit (APU) circuit (not shown).
2. Open cooling system vent valve (where applicable) on top
radiator pipe.
3. Fill deaeration tank with proper coolant to top of fill neck.
4. Close cooling system vent valve when air is purged and
coolant is seen flowing from valve (where applicable).
5. Disconnect EGR valve electrical connector. For N9 and N10
engine EGR location see N9 and N10 engine left-side view.
N9 and N10 engine left-side view
1. EGR valve
2. EGR electrical connector
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