Change the coolant and flush the cooling system
WARNING
BURN HAZARD!
Heated coolant spray or steam can cause personal injury.
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.
WARNING
CHEMICAL HAZARD!
The machine contains substances that could cause harm to the
environment and to your health.
If not reused, dispose of in accordance with local environmental
regulations.
Wear approved personal protective equipment.
CAUTION
Do not operate the engine with the pressure cap off at temperatures
above 93°C (200°F). This can result in potential engine damage by
cavitation of the water pump and localized boiling.
CAUTION
Do not relieve the system pressure while hot in order to “top off”
immediately before returning the vehicle to service. The system will
not be able to generate the pressure through the expansion of the
coolant necessary for operation. This can result in potential engine
damage by cavitation of the water pump and localized boiling.
CAUTION
Never use water alone for coolant. Damage from corrosion can be
the result of using water alone for coolant.
Drain
1 Position the vehicle or equipment on a level surface.
2 Isolate the engine from the vehicle cooling system by closing
coolant flow valves to the equipment heating systems before
initiating repair. This will prevent the heater circuit from drain‐
ing, minimizing the chance for air pockets to be present during
24
1 Engine – 1.7 Cooling system
TL2 Maintenance Manual
591 003 Default
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