Note: Inspect the water pump and the water
temperature regulator after the cooling system has
been drained. This inspection is a good opportunity
to replace the water pump, the water temperature
regulator, and the hoses, if necessary.
Drain
Pressurized System: Hot coolant can cause seri-
ous burns. To open the cooling system filler cap,
stop the engine and wait until the cooling system
components are cool. Loosen the cooling system
pressure cap slowly in order to relieve the
pressure.
1. Stop the engine and allow the engine to cool.
Loosen the cooling system filler cap slowly to
relieve any pressure. Remove the cooling system
filler cap.
Note: Refer to Operation and Maintenance Manual,
“General Hazard Information” for information on
Containing Fluid Spillage.
Illustration 54 g06310215
Typical example
2. Remove drain plug (1) on the engine. Open the
drain cock or remove the drain plug on the
radiator.
Allow the coolant to drain into a suitable container.
M0094137-02 87
Maintenance Section
Coolant (Commercial Heavy-Duty) - Change
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