Page 134 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

EXERCISE 7.5: Practice on reverse flushing radiator

Objectives

At the end of this exercise you shall be able to
• clean and reverse flush the radiator.

Requirements

Tools/Instruments Materials
• Trainee’s tool kit - 1 No. • Tray - 1 No.
• Box spanner set - 1 Set. • Cotton cloth - as reqd.
• Kerosene - as reqd.
Equipments/Machines
• Soap oil - as reqd.
• Multi cylinder diesel engine • Coolant - as reqd.
• Air compressor, water washer - 1 No. • Radiator hose and clamp - as reqd.

Procedure

1 Remove the radiator upper and lower hose
2 Attach a drain hose pipe (6) at the top of the radiator.
3 Attach a new piece of hose (7) to the radiator outlet at the bottom.
4 Insert a flushing water and air gun in the mouth of the hose pipe at the radiator outlet (Fig 1).

5 Connect the water hose of the flushing gun to a water line and the air hose to an air line.
6 Start the water line and fill up the radiator.
7 When the radiator is full of water, switch on the airline and blow air in short blasts. Fill water into radiator again
and blow air in short blasts again.
8 Continue the flushing operation until the water runs clear through the top hose.
9 Plug the outlet at the bottom of the radiator.
10 Fit the radiator filler cap.
11 Remove the drain cock. Connect a long air hose to the radiator at the drain cock hole.

12 Submerge the radiator in a water tank with the air hose above the water level.
13 Admit air at 1 to 1.5 kg/ cm2 pressure into the air hose and check for signs of leakages.
14 Repair the leaky spots.
15 Repeat the air pressure test for check radiator leaks, ensure there is no leakages in the radiator assembly.

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