O
II. ANTI FREEZING PRECAUTIONS (FOR COLD COUNTRIES) BELOW 0 C TEMP.
O
Precautions against damage by freezing should be taken if the engine is to be left exposed to temperature below 0 C either by
adequately draining the water system or by addition of an anti-freeze solution of reputed make and incorporating suitable corrosion
inhibitor. The coolant solution containing 40% anti-freeze in water in a properly maintained engine should maintain its anti-freeze
and anti-corrosive properties through out the winter season and in general, a safe life of 12 months maybe reasonable expected.
When draining the water circulating system, it is not enough merely to open the radiator drain cock. The cap on the cylinder block
must also be opened. This cap is on the rear side of the cylinder block where a pressurized radiator filler cap is fitted this should be
removed before draining the cooling system. When draining the cooling system ensures that the engine is on level. When the engine
is drained, in the majority of applications the water pump is also drained, but rotation of the pumping may be prevented by locking of
the impeller by ice due to the pump drain hole being locked by sediment and or by locking of the seal through the freezing of moisture
0
between the seal and gland. clean & check the same. 40% antifreeze should be used up to -20 C ambient temperature. Please use
below mentioned antifreeze mixing ratio according to ambient temperature.
III. PRECAUTIONS TO BE TAKE WHILE WORKING BELOW FREEZING POINT.
Before starting the engine, turn the fan and water pump by hand this will indicate if
freezing has taken place. This should free of any ice formation. If it is impossible to turn the
pump by hand, the radiator and engine should be filled with warm water. After the anti-freeze
solution has been used, the cooling system should be thoroughly flushed in accordance with
the manufacturer's precautions before refilling the normal coolant.
IV. RADIATOR DRAINING (When Cold)
Drain the radiator by unscrewing the drain plug of radiator and hose pipe connections must be
removed before draining.
% Vol of Antifreeze
Freezing Point
10
-3
20
-9
30
-18
40
-25
50
-37
Drain Plug
51
Operator Manual
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