Coolant Concentration - IC Bus CE Series Operation And Maintenance Manual

Maintenance
Deaeration Tank
1. COLD MAX Line
2. Vented Fill Cap
3. COLD MIN Line
To function properly, the coolant system must be completely filled
with coolant and all air must be expelled. To accomplish this, the
following procedures should be carefully completed:
1. Open any shutoff valve in the heater circuit, in-transit heat
circuit, or Auxiliary Power Unit (APU) circuit (not shown).
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2. Open the cooling system vent valve (where applicable) on
the top radiator pipe.
3. Fill the deaeration tank with the proper coolant to the top of
tank.
4. Close cooling system vent valve when air is purged and
coolant is seen flowing from valve.
5. To purge air from the cooling system, start engine and run at
an elevated idle (1,500 rpm) for approximately 10 minutes.
6. Verify coolant concentration and adjust coolant level to the
COLD MAX level.
7. Install the deaeration tank cap once the coolant is stabilized
at the COLD MAX level.
8. Verify the coolant is at the correct level and concentration.
9. Inspect and adjust the coolant level as necessary, prior to
daily operation.

Coolant Concentration

CAUTION
To prevent vehicle and / or engine component
damage, always use the proper coolant to top off
the cooling system. Failure to do so may result in
the loss of coolant life properties.
It is required that the PSI 8.8L LPG engine uses Dex-Cool
Coolant in the cooling system. Dex-Cool
phosphate, silicate, borate and amine-free formulation that
uses a patented carboxylate technology to provide maximum
®
® is a nitrite, nitrate,