Engine cooling system - check fluid level, adjust to correct level. Inspect anticorrosion/antifreeze protection, adjust to correct concentration

AP20.00-D-2010A

Engine cooling system - check fluid level, adjust to correct level. Inspect anticorrosion/antifreeze protection, adjust to correct concentration

12.05.2020

Engine

104.900, 111.948/950/978/980, 601.942/970, 611.980 in model 638

Engine

111.979/984, 601.943, 602.980, 611.981/983/987, 612.981 in model 903, 904

Engine

111.979/984, 601.943, 602.980, 611.981/987 in model 901

Engine

111.979/984, 601.943, 602.980, 611.981/987, 612.981 in model 902

Engine

112.951/976, 272.978, 642.890/990, 646.980/981/982/983, 651.940 in model 639

except code MA0 (E-CELL 60 kW)

Engine

272, 646.980, 651 in model 636

Engine

602.984/985 in model 667, 668, 670

Engine

611.983 in model 690.6

Engine

647.981 in model 903.61/66/67, 904.61/66

with code ZU7 (National version for Canada)

Engine

647.981 in model 903.61/66/67, 904.61/66

with code ZU8 (National version for USA)

Engine

647.981 in model 903.61/66/67, 904.61/66

with code ZU9 (National version for Mexico)

Engine

900.9, 904.9 in model 668, 670

Model 638

Model 636, 639

Model 690.6, 901, 902, 903, 904, 905

MODEL 667, 668, 670

 Danger

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

 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



Check

1

Unscrew cap (1)

2

Check coolant level



Service Information: Coolant

MODEL 639

SI20.00-S-0001B

 Check coolant level and adjust to correct level only if coolant temperature is below 50 °C.
The cooling circuit is filled correctly if the engine coolant level is displayed as follows:
Model 638 on the marking in the filler neck (arrow).
Model 636, 639, 667, 668, 670 on the MAX marking on the reservoir.
Model 690.6, 901, 902, 903, 904, 905 on the MAX. marking in the filler neck.

 Check anticorrosion/antifreeze protection before adjusting coolant to correct level. Drain coolant at drain valve of radiator, if necessary, for this purpose.

3

Lift/jack up vehicle

Topical note

Special instructions for lifting and supporting vehicle

AH00.60-N-0100-01A



MODEL 636, 639

AR00.60-S-1000S

 For draining coolant at radiator drain valve.

4

Check corrosion protection/antifreeze protection

 ENGINE 104, 111, 112Coolant drain plug

*BA20.20-N-1001-01A

 ENGINE 272, 601, 602, 642, 646, 651Drain screw at cooler (reference value)

*BA20.20-N-1001-01B

 ENGINE 611.980Coolant drain plug to radiator (reference value)

*BA20.20-N-1001-01G

 ENGINE 611.981/983/987Coolant drain plug to radiator (reference value)

*BA20.20-N-1001-01G

 ENGINE 612.981Coolant drain plug to radiator (reference value)

*BA20.20-N-1001-01G

 ENGINE 647.981Coolant drain plug to radiator (reference value)

*BA20.20-N-1001-01G

 ENGINE 900, 904Coolant drain plug to radiator

*BA20.20-N-1001-01D

If the corrosion protection/antifreeze protection reading is too low:



Drain off and collect some of the coolant.

5

Adjust coolant to correct level



Anticorrosion/antifreeze agents (Sheet 325.0)

BB00.40-P-0325-00A

 Only use coolant of the correct composition.

 Engine all (Light transporter)Mixture ratio for coolant

*BF20.00-N-1001-04A

6

Screw on cap (1)

 Radiator, coolant hoses, coolant lines

Number

Designation

Engine 104.900

Engine 111.948/978

BA20.20-N-1001-01A

Coolant drain plug

Nm

3

3

 Radiator, coolant hoses, coolant lines

Number

Designation

Engine 111.950/980

Engine 111.979/984

BA20.20-N-1001-01A

Coolant drain plug

Nm

3

3

 Radiator, coolant hoses, coolant lines

Number

Designation

Engine 112.951/976

BA20.20-N-1001-01A

Coolant drain plug

Nm

3

 Cooler, coolant hoses, coolant lines

Number

Designation

Engine 272 in model 636
Engine 272.978 in model 639

Engine 601.942/970

BA20.20-N-1001-01B

Drain screw at cooler (reference value)

Nm

3

3

 Cooler, coolant hoses, coolant lines

Number

Designation

Engine 601.943

Engine 602.980

BA20.20-N-1001-01B

Drain screw at cooler (reference value)

Nm

3

3

 Cooler, coolant hoses, coolant lines

Number

Designation

Engine 602.984/985

Engine 642.890/990 in model 639

BA20.20-N-1001-01B

Drain screw at cooler (reference value)

Nm

3

3

 Cooler, coolant hoses, coolant lines

Number

Designation

Engine 646.980 in model 636
Engine 646.980/981/982/983 in model 639

Engine 651 in model 636
Engine 651.940 in model 639

BA20.20-N-1001-01B

Drain screw at cooler (reference value)

Nm

3

3

 Radiator, coolant hoses

Number

Designation

ENGINE 904.9, 906.9

ENGINE 900.9

BA20.20-N-1001-01D

Coolant drain plug to radiator

Nm

4

4

 Radiator, radiator hoses, radiator lines

Number

Designation

Engine 611.980

Engine 611.981/ 983/987

BA20.20-N-1001-01G

Coolant drain plug to radiator (reference value)

Nm

3

3

 Radiator, radiator hoses, radiator lines

Number

Designation

Engine 612.981

Engine 647.981

BA20.20-N-1001-01G

Coolant drain plug to radiator (reference value)

Nm

3

3

 Mixture ratio for coolant

Number

Designation

Engine all (BUS, Heavy transporter, Light transporter, TRUCK, UNIMOG)

BF20.00-N-1001-04A

Mixture ratio for coolant

Antifreeze/water down to -37 °C

%

50/50

Antifreeze/water down to -45 °C

%

55/45

Sheet

BB00.40-P-0310-01A

Sheet

BB00.40-P-0325-00A

Sheet

BB00.40-P-0325-05A