Remove/install coolant pump

AR20.10-W-1271C

Remove/install coolant pump

15.2.12

18.3.09

Value modified: Bolt connecting coolant inlet fitting to coolant pump

*BA20.10-N-1002-01P

 

Remove/install

 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



Notes on coolant

AH20.00-N-2080-01A



Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

1

Switch off ignition

 Danger!

Risk of explosion caused by escaping oxyhydrogen gas. Risk of injury caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte (contains diluted sulfuric acid) or metal spatter due to short circuit. Risk of burn injuries caused by short circuit. Risk of poisoning caused by swallowing battery electrolyte (contains diluted sulfuric acid) or absorption of lead over the skin or orifices

No fire, sparks, open flames or smoking.

Wear acid-resistant gloves and clothing and safety glasses with side guards.

Do not place any conductive objects on the battery and avoid any short circuit from battery positive to ground.

Only fill liquid battery electrolyte (diluted sulfuric acid) into suitable and appropriately marked containers.

AS54.10-Z-0001-01A

2

Disconnect ground lead from battery



Notes on battery

AH54.10-P-0001-01A

3.1

Remove bracket (1) for the viscous fan

Only vehicles without code (MZ5) electromagnetic fan drive (Linnig clutch)

AR20.40-W-5640A

3.2

Remove electromagnetic fan clutch

Only vehicles with code (MZ5) Electromagnetic fan drive (Linnig clutch)

AR20.40-W-5616B

4

Remove guide pulley (16) on alternator carrier



*BA13.22-N-1001-01G

5

Remove upper bolt (14) on alternator (G2) and detach the lower bolt (15)

 Tip alternator (G2) away from engine.

 Bolt M10

*BA15.40-N-1003-01M

 Bolt M12

*BA15.40-N-1004-01M

6

Remove bracket (18) on coolant inlet connection (2) and charge air pipe (17)

7

Detach lower bolt (12) on coolant inlet connection (2) and engine support (11)

8

Detach coolant inlet connection (2) from coolant pump (6)

 Collect escaping coolant in a clean vessel.



*BA20.10-N-1002-01P

9

Detach coolant outlet connection (4) from coolant pump (6)



*BA20.10-N-1001-01P

10

Remove seal rings (10) and coolant thermostat (5)

 Installation: Observe installation position of coolant thermostat (5), the markings (arrow) must point upwards.

11

Remove holder (13) and remove coolant line retarder (8) from the coolant pump (6)

 Only vehicles with code (BA1) Performance-optimized Voith retarder or with code (BA9) Voith secondary retarder R 115.

Collect escaping coolant in a clean vessel.



*BA20.10-N-1007-01P

12

Detach belt pulley of coolant pump (9)



*BA20.10-N-1004-01P

13

Remove coolant pump (6)



*BA20.10-N-1003-01P

14

Install in the reverse order

Number

Designation

Engine 457.9

BA13.22-N-1001-01G

Bolt, guide pulley to carrier

Nm

50

Number

Designation

Engine
457.9

BA15.40-N-1003-01M

Bolt, alternator to carrier

M10

Nm

50

BA15.40-N-1004-01M

Bolt/nut, alternator to carrier

M12

Nm

80

Number

Designation

Engine
457.9

BA20.10-N-1001-01P

Bolt, coolant outlet connection with
coolant thermostat to coolant pump

Nm

25

BA20.10-N-1002-01P

Bolt connecting coolant inlet fitting to coolant pump

Nm

60

BA20.10-N-1003-01P

Bolt connecting coolant pump to crankcase

Nm

30

BA20.10-N-1004-01P

Bolt, pulley to coolant pump

Nm

25

BA20.10-N-1007-01P

Bolt, retarder coolant line to coolant pump

Nm

25