Remove/install coolant pump

AR20.10-S-1271EV

Remove/install coolant pump

02.12.2019

Engine

780.994 in model 639.603

with code MA0 (E-CELL 60 kW)

Vehicles with battery cooling circuit, low-temperature coolant pump

1

Coolant hose

4

Electrical connector

6

Retaining clamp

2

Clip

5

Retaining clamp

M43/1

Low temperature coolant pump

3

Screw

 

Remove/install

 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

1

Open engine hood and secure against falling down

2

Carry out enable of high voltage system

AR54.10-S-1160EV

3

Drain coolant of the low-temperature cooling circuit

AR20.00-S-1140EV

4

Detach clamps (2) at coolant hoses (1)

 Hose clamp pliers

*003589033700

5

Disconnect coolant hoses (1) from low-temperature coolant pump (M43/1)

 Collect coolant which flows out.

6

Seal connections at low-temperature coolant pump (M43/1) and coolant hoses (1)

7

Loosen bolts (3) at retaining clamps (5, 6) and pull low-temperature coolant pump (M43/1) out of retaining clamps (5, 6) until electrical connector (4) is accessible

 Installation: Observe installation position of low-temperature coolant pump (M43/1) to retaining clamp (6). Align low-temperature coolant pump (M43/1) when you insert it.

 Bolt, low temperature coolant pump clamp to transmission carrier

*BA20.10-N-1001-01U

 Bolt, low temperature coolant pump clamp to transmission

*BA20.10-N-1002-01U

8

Disconnect electrical connector (4) from low-temperature coolant pump (M43/1) and remove low-temperature coolant pump (M43/1)

9

Install in the reverse order

 Coolant pump, coolant thermostat

Number

Designation

Engine 780.994 in model 639.603/703
with code MA0 (E-CELL 60 kW)

BA20.10-N-1001-01U

Bolt, low temperature coolant pump clamp to transmission carrier

Nm

20

 Coolant pump, coolant thermostat

Number

Designation

Engine 780.994 in model 639.603/703
with code MA0 (E-CELL 60 kW)

BA20.10-N-1002-01U

Bolt, low temperature coolant pump clamp to transmission

Nm

20