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4-48
435/485/535
To remove the coolant in the engine block, disconnect
the lower radiator hose (4) from the base of the radiator.
This will drain whatever coolant is in the water jacket
of the engine.
Drain all the coolant into a suitable container and
follow all local laws and regulations for disposal.
Turn off the coolant filter shutoff valve so the filter is
isolated from the cooling system during cleaning and
flushing operations.
IMPORTANT: Failure to isolate the cooling system
filter by closing the shutoff valve will contaminate
the cooling system filter, and the filter will have to be
replaced whether its change interval has been reached
or not.
Flushing the Cooling System
Refer to page 8-25 of the Cummins QSX15 engine
operation and maintenance manual supplied with the
tractor for the correct coolant system flushing schedule
and procedure.
After the cooling system is cleaned, retighten the
petcock (3) and reinstall the lower radiator hose (4).
Open the cooling system filter shutoff valve (5).
F4-30
ON OFF
5
F4-75
4
Section 4 - Lubrication & Maintenance
Every 2000 Hours or 2 Years