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Installation Instruction Number	Date
4907791	01-JUL-2009

Cummins Inc.	


  Installation Instructions


    Cooling System Fill Instructions

This Installation Instruction reviews the importance of cooling system
maintenance and the impact on the engine exhaust gas recirculation (EGR)
cooler. This information has been added to Procedure 008-018 (Cooling
System) in Section 8 of the Signature™, ISX, and QSX15 Service Manual,
Bulletin 3666239.

With the introduction of engine EGR and its associated engine hardware,
performing proper coolant drain and fill procedures is extremely
important in lengthening engine life.

Be observant when filling an engine with coolant. Depending on the
coolant system, there can be special fill instructions. Watch for
information decals or tags, that contain special instructions for
filling an engine with coolant. These instructions can be located
anywhere on the cooling system (surge tank, radiator tank, radiator
mount, firewall, etc.). If no special instructions are present, search
for a manual bleed valve or pipe plug on the upper radiator pipe and
open this valve or plug during the coolant fill process. The manual
bleed valve or pipe plug will allow trapped air to escape during the
fill process. *Not* all applications have a bleed valve or pipe plug.
See Figure 1.

SMALL
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Figure 1


 WARNING 

Do not remove the pressure cap from a hot engine. Wait until the coolant
temperature is below 50°C [120°F] before removing the pressure cap.
Heated coolant spray or steam can cause personal injury.

 WARNING 

Coolant is toxic. Keep away from children and pets. If not reused,
dispose of in accordance with local environmental regulations.

The following are steps for filling an engine with a manual bleed valve
or pipe plug in the upper radiator pipe:

  * Open the manual bleed valve on the upper radiator pipe, or remove
    the pipe plug
  * Add coolant slowly until the level is at the base of the coolant
    fill neck
  * Close the bleed valve on the upper radiator pipe, or install the
    pipe plug. Do *not* install the coolant pressure cap at this time
  * Start the engine and allow it to reach an operating temperature of
    85°C [185°F], or until the thermostats opens.
  * Shut the engine off and check the coolant level. Adjust the coolant
    level, as necessary.

If any drained coolant remains after filling, there is an air pocket in
the system which *must* be purged. Allow the engine to reach operating
temperature and top-off the system with coolant.


        NOTE: Proper fill and deareration of the system is critical to
        EGR cooler life.

Last Modified:  26-Oct-2009
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