New Holland TC21D, Operator'S Manual

Page: 67 / 102

SECTION 3 - LUBRICATION AND MAINTENANCE
3-16
Draining and Flushing the Cooling System
NOTE: Drain and flush the radiator and engine block
every 12 months. Refill with a 50/50 mixture of
permanent antifreeze and clear water.
To drain the cooling system:
1. Use a suitable receptacle to catch the used
coolant. Remove the radiator cap and open the
drain valve, 1, on the right-hand tractor frame to
drain the radiator and engine block.
2. After the coolant has drained, place a water hose
in the radiator filler neck and run water through
the system. When water is flowing from the block
drain valve, start the engine. When the water
flowing from the drain valve is free of
discoloration and sediment, stop the engine and
remove the hose. Allow all water to drain from the
system through the drain valves.
3. Close the drain valve and slowly refill the system
with a 50/50 solution of permanent antifreeze
and clear water. Fill until the coolant level is
approximately 3.8 cm-5 cm (1-1/2
″
-2
″
) below the
bottom of the filler neck. Do not fill beyond this
level.
4. Clean the radiator cap and cap seal and install
the cap.
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5. Fill the coolant recovery reservoir bringing the
fluid level up until it is between the full and low
marks on the reservoir.
6. Clean the radiator front screen, 2.
7. Run the engine until normal operating tempera-
ture is reached, then stop the engine. Recheck
the coolant level when the engine is cold and add
additional coolant as necessary.
IMPORTANT: Never run the engine when the cooling
system is empty. Do not add cold water or cold
antifreeze solution if the engine is hot.
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NOT FOR REPRODUCTION