Page 177 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

In this system, water is filled in the radiator, in which there is an upper tank at the top and a lower tank at the
bottom. Both the tanks are connected by thin copper tubes. Zig-zag fans are installed around the tubes, in which
the area increases due to the flow of air. There is a space made in the upper tank to fill water, on which a water
tight cap is used. It is also called ‘Ford Feed System’. In this tank, a rubber hose pipe is fitted to return the hot
water coming from the water jackets. The lower tank is connected to the water inlet through a rubber hose pipe.
A special type of water pump is installed at this place.

Basic components of cooling system
1 Radiator
2 Thermostat
3 Thermo-Switch
4 Coolant reservoir
5 Water Pump

6 Cooling Fan
7 Radiator pressure cap
8 Water jacket
9 Radiator Shutter and Cowl

1 Radiator: The radiator is fitted at the front of the engine. Its main function is to cool the hot water coming from
the engine. For this purpose, thin tubes are used in the radiator. These tubes are surrounded by fin lays.
Due to this type of structure, the cooling surface (cooling surface) becomes larger, due to which the water gets
cooled quickly. The radiator has an upper tank and a lower tank. In the middle of which the radiator core is
installed.
The upper tank is connected to the engine drain by a rubber hose and the lower tank is connected to the water
pump by a rubber hose.

Main part of radiator

1 Upper tank
2 Lower Tank
3 Radiator core
4 Radiator cap
Radiator core: When air is passed through a shorter path, it becomes cool. The radiator core is made by soldering
the upper and lower tanks or connecting them with nuts and bolts. The radiator core is made up of tiny tubes. Fins
are fitted on top of these tubes, which work to cool the water flowing inside the tubes.
The radiator core is classified into two parts
a Tubular type radiator core: In tubular type radiator core the upper and lower tanks are connected by tubes.
Water passes through these tubes. Cooling fans are installed around the tubes, which absorb the heat of water
and spread it into the atmosphere. If the tube gets blocked for some reason, the cooling of the water stops

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CITS : Automotive - Mechanic Diesel - Lesson 47 - 56