Service Manual

Cooling System ISB, ISBe and QSB (Common Rail [...]
Page 8-34 Section 8 - Cooling System - Group 08
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Be sure there is no air pressure in the coolant
replacement tool tank by opening the pressure relief valve
(1) located on the control block of the coolant replacement
tool.
Connect the coolant replacement tool to a shop air supply
regulated at 621 kPa [90 psi].
Attach the fill hose quick disconnect coupling (1) of the
coolant replacement tool to the quick disconnect fitting
located in the vehicle/equipment cooling system package.
With the service hose valve (2) in the closed position,
switch the coolant replacement tool control lever (3) to “P”
and build 172 kPa [25 psi] pressure on the gauge.
Slowly open the service hose valve (2) part way by turning
it counterclockwise approximately 1/8 turn.
Do not open the ball valve completely as this will increase
the coolant flow rate and increase the amount of air
pockets created in the cooling system; This will provide a
more complete injection of coolant.
Fill the cooling system with coolant to the bottom of the fill
neck in the radiator fill or recovery/expansion tank or until
the coolant replacer tool is empty (whichever occurs first).
On applications that use a coolant recovery system, check
to make sure the coolant is at the appropriate level in the
coolant recovery tank for the engine temperature.
Many coolant recovery/expansion tanks, also called "top
tanks", have sight glasses or are made of a clear material
(not shown) to aid in checking the coolant level without
removing the radiator cap.
It is important to understand the impact of temperature on
the expansion of the coolant. Most "top tanks" do not
have a provision for a "FULL HOT" coolant level. Filling
the "top tank" while hot will result in a low operating level
once the system has cooled.