Check engine cooling system for leaktightness

AR20.00-P-1011SC

Check engine cooling system for leaktightness

19.08.2020

Engine

176 in model 223

#[P20.00-A086-76]

1

Cap

2

Coolant expansion reservoir

3

Tester cap

4

Pressure pump

 Warning

Risk of injury due to fan starting unexpectedly

Do not reach into the rotation or hazard area of the fan. Wear closed and close-fitting work clothes.

AS20.40-Z-0001-01A

 Warning

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from 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

Topical note

Notes on coolant

AH20.00-N-2080-01A

Notes on coolant level

AH20.00-P-1142-01CW



Remove

1

Switch on ignition.

2

Adjust heater to maximum heating output.

3

Open cap (1) on coolant expansion reservoir (2) carefully and reduce overpressure.

4

Check coolant level and antifreeze content of coolant.

 Cooling system

*BF20.00-P-1001-02MA

5

Screw tester cap (3) onto coolant expansion reservoir (2).

 Test cap

*210589009100

6

Connect pressure pump (4) at tester cap (3).

 Pressure pump

*124589242100



Check

7

Apply a test pressure to the engine cooling system for 2 minutes.


Do not exceed the specified test pressure.
Damage will occur otherwise to the engine cooling system.

 There should be no pressure loss within a period of 2 minutes.

Test pressure for pressure-testing the cooling system

*BE20.30-P-1002-01D

8

Perform visual check of coolant-carrying component parts and connecting points for condition and coolant loss.

Where pressure loss is detected.



Install

9

Drain off overpressure via valve at pressure pump (4).

 Pressure pump

*124589242100

10

Unscrew pressure pump (4) from tester cap (3).

11

Unscrew tester cap (3) at coolant expansion reservoir (2).

 Test cap

*210589009100

12

Switch off ignition.

13

Check coolant level and antifreeze content of coolant; correct if necessary.

 Cooling system

*BF20.00-P-1001-02MA

14

Install the cap (1) on the coolant expansion reservoir (2).

Cooling system check values

Number

Designation

Engine 176

BE20.30-P-1002-01D

Test pressure for pressure-testing the cooling system

Overpressure

bar

1,4

 Cooling system

Number

Designation

Model 223 with engine 176

BF20.00-P-1001-02MA

Cooling system

Workshop replacement amount

Main circuit

Liter

15.2

Low-temperature circuit

Liter

1.7

Antifreeze/water

to -37 °C

%

50/50

Specifications for Operating Fluids, sheet

BB00.40-P-0310-01A

Specifications for Operating Fluids, sheet

BB00.40-P-0325-06A

Specifications for Operating Fluids, sheet

BB00.40-P-0326-06A

as from -38 °C

%

55/45