The document discusses tractor cooling systems. It defines a cooling system as the system that controls engine temperature. Cooling systems are needed because fuel combustion inside the engine cylinders can produce temperatures as high as 1600 degrees Celsius, which is higher than the melting point of engine parts. There are two main types of cooling systems - air cooled and water cooled. Air cooled engines conduct heat directly from the engine to the atmosphere using fins on the cylinders. Water cooled engines circulate liquid, usually water, around the cylinder to absorb heat and transfer it to a radiator system using components like a water pump, radiator, thermostat, hoses and fan. The document outlines the components and functions of water cooled systems and discusses issues like overheating that

1. TRACTOR COOLING
SYSTEM
BY,

2. Defination :- The system which control
engine temperature is known
as cooling system.
:-Fuel is burnt inside cylinder of
I.C.engine to produce power.
:- The temperature produced on
power stroke of an engine can be as
high as 1600 dc and this is greater
than melting point of engine part.
:- Therefore to cool engine, cooling
system is introduced.

3. .To maintain optimum temperature
of engine for efficient operation.
. To maintain lubricant property of
oil inside the engine cylinder for
normal function.
.To protect engine component from
high temp.

4. Bad effect of high temperature of engine:-
• cylinder and piston may expand to such a extent that the
piston would seize in cylinder and stop the engine.
• lubricating quality of the oil inside of the cylinder would be
distroyed due to high temperature and their may not be
sucking of air in the cylinder.
• preignition of fuel mixture would take place and would cause
engine knocking as well as loss of power.

6. Air cooled engines are those engine
in which heat is conducted from the
working components of the engine to
the atmosphere directly.

7. Principle of air cooling system:-
1)Cylinder of an air cooled engine has fins to
increase the area of contact of air for speedy
cooling.
2) The fins metallic ridges which are form
during casting of cylinder and cylinder head.

9. AdvAntAges of Air cooling system
-It is more simple in design & construction.
Water jacket, radiator, thermostat, water pump,
hose pipe, etc. are not needed.
-It is more compact
-It is comparatively lighter in weight
disAdvAntAges
-There is uneven cooling of engine parts
-Engine temperature is generally high during working
period.

10. -Engines using water is cooling medium is called
water cooled engine.
-The liquid is circulate round the cylinder to absorb
heat form cylinder walls.
-In general water is used as cooling liquid.

11. 1. open jAcket or hopper
method:-
• In this method hopper or jacket containing water
which is surround the engine cylinder.
• As the engine is continuously operate water start
boiling replace the cold water.
• Drain plug is provided in this method for removing the
water.

12. 2. Thermosiphon
meThod:-
• In this method radiator, water jacket, temperature
gauge hose connection.
• The water which is surround the cylinder is lighter
due its hotness.
• And then that hot water goes to radiator and cold
water goes back to the engine cylinder block.

13. 3. Forced circulaTion
sysTem:-
• In this method water pump is used to forced the water
from cylinder to the water jacket.
• The circulating run of water jacket, comes back to
radiator through thermostat valve.

14. componenT oF waTer cooling sysTem

15. waTer pump
• It is centrifugal type pump casing an impeller mounted on
the shaft.
•Water pump is mounted at the front end of the cylinder
block.

16. radiaTor
It is a device used for
cooling the circulating
water in engine.

17. Fan :- Fan is used to provide strong draft
of air through radiator to improve
engine cooling

18. Water jacket
•Water jacket are cored around the engine cylinder
So that water can be circulate freely around the
cylinder
•

19. thermostate valve
• it is control valve used in the cooling system to
control the flow of water when activated by
temperature signal.

20. Radiator cap
N
Hose pipe
Fan belt

21. cooling system troubles
•Due to poor cooling system following
problems
1)Overheating
2)Slow warm up of engine
•Accumalation of rust and scale in the radiator
•
•Defective hose pipe
•Defective thermostat
•Defective water pump
• Loose fan belt

22. care and maintenance
-Fresh water should be filled in radiator.
-Checking of hose pipe.
-Checking of tension of fan belt.
-Very hot engines should never be filled with cold
water.

23. TTHHAANNKK
you