2. Open the cooling system drain valve (if equipped).
If the cooling system is not equipped with a drain
valve, remove one of the drain plugs.
Note: If equipped, be sure to drain the heater and
any related supply and return lines.
Allow the coolant to drain.
NOTICE
Dispose of used engine coolant properly or recycle.
Various methods have been proposed to reclaim
used coolant for reuse in engine cooling systems.
The full distillation procedure is the only method ac-
ceptable by Caterpillar to reclaim the used coolant.
For information regarding the disposal and the
recycling of used coolant, consult your Cat dealer or
consult Cat Dealer Service Tool Group:
Outside Illinois 1-800-542-TOOL
Inside Illinois 1-800-541-TOOL
Canada 1-800-523-TOOL
Flush
1. Flush the cooling system with clean water in order
to remove any debris.
2. Close the drain valve (if equipped). Clean the drain
plugs. Install the drain plugs. Refer to the
Specifications Manual, SENR3130, “Torque
Specifications” for more information on the proper
torques.
NOTICE
Fill the cooling system no faster than 19 L (5 US gal)
per minute to avoid air locks.
3. Fill the cooling system with a mixture of clean
water and Cat Quick Flush cooling system cleaner.
Refer to the directions for the cleaner. For
additional information on cooling system cleaners,
refer to the One Safe Source catalog. Install the
cooling system filler cap.
4. Start and run the engine at low idle for a minimum
of 30 minutes. The coolant temperature should be
at least 82 °C (180 °F).
NOTICE
Improper or incomplete rinsing of the cooling system
can result in damage to copper and other metal
components.
To avoid damage to the cooling system, make sure to
completely flush the cooling system with clear water.
Continue to flush the system until all signs of the
cleaning agent are gone.
5. Stop the engine and allow the engine to cool.
Loosen the cooling system filler cap slowly in
order to relieve any pressure. Remove the cooling
system filler cap. Open the drain valve (if
equipped) or remove the cooling system drain
plugs. Allow the water to drain. Flush the cooling
system with clean water. If equipped, be sure to
flush the heater and any related supply and return
lines. Close the drain valve (if equipped). Clean
the drain plugs. Install the drain plugs. Refer to the
Specifications Manual, SENR3130, “Torque
Specifications” for more information on the proper
torques.
Cooling Systems with Heavy
Deposits or Plugging
Note: For the following procedure to be effective,
there must be some active flow through the cooling
system components.
1. Flush the cooling system with clean water in order
to remove any debris.
Note: If equipped, be sure to flush the heater and
any related supply and return lines.
2. Close the drain valve (if equipped). Clean the drain
plugs. Install the drain plugs. Refer to the
Specifications Manual, SENR3130, “Torque
Specifications” for more information on the proper
torques.
NOTICE
Fill the cooling system no faster than 19 L (5 US gal)
per minute to avoid air locks.
3. Fill the cooling system with a mixture of clean
water and Cat Fast Acting Cooling System
Cleaner. Add 0.5 L (1 pt) of cleaner per
3.8 to 7.6 L (1 to 2 US gal) of the cooling system
capacity. Install the cooling system filler cap.
4. Start and run the engine at low idle for a minimum
of 90 minutes. The coolant temperature should be
at least 82 °C (180 °F).
NOTICE
Improper or incomplete rinsing of the cooling system
can result in damage to copper and other metal
components.
To avoid damage to the cooling system, make sure to
completely flush the cooling system with clear water.
Continue to flush the system until all signs of the
cleaning agent are gone.
SEBU7125-13
109
Maintenance Section
Cooling System Coolant (DEAC) - Change
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