Page 131 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

6 Remove the stay bolt (3) at the radiator end.

7 Remove the bracket if provided.
8 Remove the radiator. Place it vertically with proper support so that it does not fall. Ensure that the radiator
cores do not touch the support (Fig 1).

9 Unscrew and remove the thermostat housing
10 Remove the thermostat valve and place it in a tray.

TASK 2 : Cleaning and inspection
1 Check the radiator pressure cap (1) and its valve mechanism for movement, pressing it by hand.
2 Check visually the radiator core for damage, clogging and leakage.

3 Check the mounting straps on the tanks of the radiator for tightness.
4 Check the soldered joints (5) of the top and bottom tanks as well as the filler neck.
5 Check visually the radiator mounting brackets for cracks, damage etc. Repair/replace the damaged parts.
6 Check visually the stay rod end for damage. Replace the damaged parts.
7 Clean the thermostat valve

8 Check the thermostat valve, if it is defective, replace it.

TASK 3 : Assembling
1 Assemble the mounting bracket to the radiator, if provided.

2 Mount the radiator on the frame aligning the top and bottom hose connections.
3 Fix the radiator stay bracket.
4 Tighten the radiator mounting and stay bracket with the help of a suitable ring spanner.
5 Fix the thermostat valve and pressure cap

6 Connect the water hoses-top and bottom. Tighten hose clips.
7 Fix the drain plug in the cylinder block and close the radiator drain tap and fill the radiator with a coolant. Start
and keep the engine running for approx. one minute at high speed. Check the water level in the radiator. Fill
it again, if required.
8 Start the engine and check for leaks. Rectify if there is any leak. Replace water hose if they are found leaky.
Check the radiator pressure cap
• Carefully touch the radiator hose and feel its hot.

Do not attempt to remove the radiator cap if engine is hot.

• Pushing down first and then twist it counter - clock wise (Fig 1) take the cap adapter from the radiator neck
(Fig 2)
• (Radiator cap hold pressure between 6 to16-PSI)

Attach the pressure tester to the filer neck of the radiator.

• Pump the pressure tester handle until the pressure builds to the specification written on the radiator cap
Note: The radiator cap should be able to hold the max pressure for up to five minutes. This take little
bit of judgement on your part. Identify the gauge should reach atleast 15 PSI.

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CITS : Automotive - Mechanic Diesel - Exercise 7.3