Remove/install coolant circuit expansion reservoir of high-voltage battery cooling system

AR08.50-S-0001F

Remove/install coolant circuit expansion reservoir of high-voltage battery cooling system

18.12.2019

Engine

780.701/702 in model 447

Shown with engine 780.701

1

Expansion reservoir

3

Vent line

6

Coolant hose

1.1

Guide pin

4

Screw

7

Elastomer bearing

2

Cap

5

Clamp

 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

 

Remove/install

1

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

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

2

Clamp off coolant hose (6).

 Clamp

*000589543700

3

Extract coolant from expansion reservoir (1).

Notes on coolant level for high-voltage battery cooling system

AH08.50-S-0051-01F

 Electric drive cooling system

*BF08.50-N-1001-01F

 Hand pump

*210589007100

4

Remove bleed line (3) from expansion reservoir (1).

AR20.20-P-7441-01RQ

5

Seal openings with suitable stop plug.

 Record plug

*129589009100

6

Unscrew screw/bolts (4).

7

Remove expansion reservoir (1) upwards until clamp (5) can be accessed.

 Installation: Ensure guide pin (1.1) is correctly inserted into elastomer bearing (7).

8

Open clamp (5) and remove coolant hose (6) from expansion reservoir (1).

 Collect escaping coolant.

 Commercially available devices/tools
Collecting pan

 Hose clamp pliers

*454589003700

9

Seal openings with suitable stop plug.

 Record plug

*129589009100

10

Remove expansion reservoir (1).



Check

11

Check elastomer bearing (7) for damage.

If elastomer bearing (7) is damaged



Replace elastomer bearing (7).

12

Install in the reverse order.



Check

13

Check high-voltage battery cooling system in the area of expansion reservoir (1) for leaktightness.

AR08.50-S-0011F

 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