Check cooling system for electric motor for leak tightness

AR08.50-S-0010F

Check cooling system for electric motor for leak tightness

18.12.2019

Engine

780.701/702 in model 447

Modification notes

16.12.2019

Method extended

Operation steps 7.2, 9.2

Shown on engine 780.701

1

Cap

3

Tester cap

2

Expansion reservoir

4

Pressure pump

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.

AS00.00-Z-0035-01A

 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

General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system

AH00.00-Z-0300-01A

Topical note

Notes on coolant

AH20.00-N-2080-01A

Notes on coolant level for electric motor cooling system

AH08.50-S-0050-01F



Check

1

Remove cap (1) of expansion reservoir (2).

 Turn cap (1) of expansion reservoir (2) counterclockwise only up to the safety catch and relieve overpressure. Then unscrew cap (1).

2

Check coolant level in expansion reservoir (2).

If the coolant level is not correct,



Correct coolant level.

 Electric drive cooling system

*BF08.50-N-1001-01F

3

Attach tester cap (3) to expansion reservoir (2).

 Test cap

*210589009100

4

Attach pressure pump (4) to tester cap (3).

 Pressure pump

*124589242100

 Test cap

*210589009100

5

Apply test pressure to electric engine.

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

Test pressure, electric motor cooling system

*BE08.50-N-1002-01F

6

Check cooling system for electric motor for leak tightness.

 Perform a visual inspection of the engine compartment from above.

If coolant loss has occurred,



Localize and eliminate cause.

7.1

Raise vehicle.

Engine 780.701 in model 447

AR00.60-S-1000E

7.2

Remove bottom engine compartment paneling.

Engine 780.702 in model 447

AR61.20-S-1105E

8

Check cooling system for electric motor for leak tightness.

 Perform a visual inspection of the engine compartment from below.

If coolant loss has occurred,



Localize and eliminate cause.

9.1

Lower vehicle.

Engine 780.701 in model 447

AR00.60-S-1000E

9.2

Install lower engine compartment lining.

Engine 780.702 in model 447

AR61.20-S-1105E

10

Actuate pressure release button at pressure pump (4) and reduce test pressure in engine cooling system.

 Pressure pump

*124589242100

11

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

 Pressure pump

*124589242100

 Test cap

*210589009100

12

Detach tester cap (3) from expansion reservoir (2).

 Test cap

*210589009100

13

Check coolant level in expansion reservoir (2).

If the coolant level is not correct,



Correct coolant level.

 Electric drive cooling system

*BF08.50-N-1001-01F

14

Attach the cap (1) of the expansion reservoir (2).

Cooling system

Number

Designation

Engine 780.701/702 in model 447

BE08.50-N-1002-01F

Test pressure, electric motor cooling system

bar

1,4

 Cooling system

Number

Designation

Engine 780.701/702 in model 447

BF08.50-N-1001-01F

Electric drive cooling system

Cooling system of high-voltage battery and vehicle interior

Filling capacity

Liter

 10

Cooling system of electric motor

Filling capacity

Liter

 5

For both cooling systems, entire filling capacity, in the workshop

Filling capacity

Liter

 15

Antifreeze/water

Down to -37 °C

%

50/50

Coolant specifications

BB00.40-P-0310-01A

Sheet

BB00.40-P-0325-05A