LUBRICATION AND MAINTENANCE
40
by the radiator cap. It is dangerous to
remove the cap while the system is hot.
Always cover the cap with a thick cloth
and turn the cap slowly counterclock-
wise to the first stop. Allow all pressure
to escape before removing the cap
completely.
Figure 58a – Radiator Coolant Reservoir
2. If the coolant level is more than 38 to 50 cm
(1-1/2 to 2 inches) below the bottom of the filler
neck, add clean water or antifreeze solution as
necessary.
If the cooling system already contains antifreeze,
add only antifreeze solution of the correct water
/ antifreeze mixture.
Plain water will dilute the solution and weaken
its protection.
IMPORTANT ：
：：
： Alcohol-type antifreeze is not
recommended. Do not mix alcohol-type solution
with permanent antifreeze.
3. Keep the radiator fins clear of chaff or dirt to al-
low free passage of air, Figure 60.
Draining and Flushing the Cooling System：
：：
：
Drain and flush the radiator and engine block every
12 months. Refill with a 50/50 mixture of long life
antifreeze, or equivalent, and clear water.
To Drain the System :
1. Remove the radiator cap and open the drain
valve along R.H. tractor frame. This valve will
drain radiator and engine block, Figure 59.
Figure 59 - Combination Engine Block and Radiator
Drain Valve
2. After the coolant has drained, place a water
hose in the radiator filler neck and run water
through the system with the engine running.
Make sure water is flowing from the drain valve
before starting the engine. When the water
flowing from the drain valve is free of discolora-
tion and sediment, stop the engine and remove
the hose. Allow all water to drain from the sys-
tem through drain valves.
3. Close the drain valve and slowly refill the sys-
tem with a 50/50 solution of permanent anti-
freeze and clear water. Fill until the coolant level
is approximately 38 to 50 mm (1-1/2 to 2
inches) below the bottom of the filler neck. Do
not fill beyond this level.
Figure 60 - Radiator Screen
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