Cooling and heating system - checking condition of radiator, lines and hoses

AP20.00-I-2050K

Cooling and heating system - checking condition of radiator, lines and hoses

18.10.99



Checking

1

Check radiator (1) for external soiling

 Fins and intermediate spaces must not be blocked with dirt.

2.1

Clean the radiator (1) with compressed air or water

Only for the case of a dirty radiator (1).

 The jet of hot water must be aimed at a right angle at the radiator (1) otherwise the cooling fins can be damaged.

 First clean the radiator (1) from the fan side.

Use a high pressure hot water cleaner to remove strong dirt.

3

Wash out remaining dirt from the intake fittings

4

Check coolant level and correct it

AP20.00-I-2011K

5

Open heating system shut-off and control valves

 Set heater to max. heat.

6

Fit tester (3) and connect up compressed-air line with a tire inflation connection (4) to the valve (2)

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*001589832100

7

Apply test pressure to the engine cooling system

 Test pressure equals the opening pressure of the cooling system which is recognizable from the code number of the cap or pressure relief valve.

Code number 40 represent a 0.4 bar overpressure.

A safety valve with an opening pressure of 1.2 bar is integrated in the tester.



*001589832100

8

Check radiator (1), water pump, oil cooler, core hole cover and heating system as well as the heat exchanger for the Voith retarder or automatic transmission for leaks

 If there are leaks: 

Replace faulty parts

- as a separate repair order.

9

Inspect all lines and hoses of the cooling and heating system for leaks, undamaged condition as well as routing and attachment free of chafing points

 If there are leaks: 

Replace defective parts or correct routing

- as a separate repair order.

10

Release pressure in the cooling system at valve (2) of the tester (3), remove tester (3) and attach cap



*001589832100

11

Close heating system shut-off and control valves