Inspecting cooling system for leaks

AR20.00-P-1010CMG

Inspecting cooling system for leaks

4.6.09



Removing

 Danger!

Risk of injury to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning caused by swallowing coolant.

Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.

Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

1

Switch on ignition

2

Adjust heater to maximum heat output

3

Unscrew cap slowly on expansion reservoir (1) and relieve overpressure

4

Check coolant level and antifreeze content coolant

Correct if necessary.



Notes on coolant

AH20.00-N-2080-01A

5

Screw tester cap (2) on to expansion reservoir (1)



*210589009100

6

Connect pressure pump (3) at test cap (2)



*124589242100



Checking

7

Apply test pressure to cooling system

 To prevent damage to cooling system, do not exceed stated test pressure.

Test pressure

*BE20.30-P-1005-01A

8

Check Henn couplings for all coolant hoses

 Check the condition and seating of Henn couplings. Replace catch springs of the Henn couplings if necessary.

See Open and close Henn coupling.

AR09.41-P-1311-01AL

9

Check coolant and heating hoses as well as their connecting points

 Check condition and coolant loss; replace coolant and heating hoses or their O-ring if required.



Install

10

Unscrew tester cap (2) slowly from the expansion reservoir (1) and reduce overpressure

11

Remove pressure pump (3)

12

Check coolant level



Notes on coolant level

AH20.00-P-1142-01CW

13

Screw cap onto expansion reservoir (1)

14

Switch off ignition

Number

Designation

2-stage
cap

BE20.30-P-1005-01A

Test pressure for pressure-testing cooling system

bar gage

1.4