Drain/fill low-temperature circuit coolant

AR09.41-P-6834CD

Drain/fill low-temperature circuit coolant

09.06.2016

Model

172 with engine 274

Model

172 with engine 651

Modification notes

07.10.2015

Coolant specification altered

Operation step 5.2

Shown on model 172 with engine 274

1

Cap

3

Coolant hose

2

Low-temperature circuit coolant expansion reservoir

 Danger !

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



Notes on coolant

AH20.00-N-2080-01A



Remove

1

Unscrew cap (1) on low-temperature circuit coolant expansion reservoir (2)

2.1

Remove bottom engine compartment paneling at front

Model 172 with engine 274

AR61.20-P-1105W

2.2

Remove soundproofing below

Model 172 with engine 651

AR94.30-P-5300W

Drain off

3

Disconnect coolant hose (3) and coolant

AR20.20-P-7441-01RQ

 Collect coolant in a suitable container.

Pour in

4

Mount coolant hose (3) at radiator

AR20.20-P-7441-01RQ

5.1

Add coolant and bleed low-temperature circuit

Model 172 with engine 274
up to model year 2015
Model 172 with engine 651

AR20.00-P-1142-04A



Anticorrosion/antifreeze agents (Sheet 325.0)

BB00.40-P-0325-00A


Do not mix together coolants with different specifications.
Engine damage can occur otherwise.

 Strictly observe the coolant specification.

 Coolant mixing ratio

*BF20.00-P-1001-04A

 Test cap

*210589009100

 Cooler vacuum filling device

*285589002100

 NTKL Adaption

*285589012100

 Electric vacuum pump

*285589022100

5.2

Add coolant and bleed low-temperature circuit

Model 172 with engine 274
as of model year 2016

AR20.00-P-1142-04A



Anticorrosion agent/antifreeze (specification 325.6)

BB00.40-P-0325-06A


Do not mix together coolants with different specifications.
Engine damage can occur otherwise.

 Strictly observe the coolant specification.

 Coolant mixing ratio

*BF20.00-P-1001-04A

 Test cap

*210589009100

 Cooler vacuum filling device

*285589002100

 NTKL Adaption

*285589012100

 Electric vacuum pump

*285589022100



Check

6

Check low-temperature circuit for leaktightness

Model 172 with engine 651

AR09.41-P-1010LW

Model 172 with engine 274

AR09.41-P-1010CD



Install

7.1

Install bottom front engine compartment paneling

Model 172 with engine 274

AR61.20-P-1105W

7.2

Install lower front soundproofing

Model 172 with engine 651

AR94.30-P-5300W

8

Tighten down cap (1) on low-temperature circuit coolant expansion reservoir (2)

 Coolant mixing ratio

Number

Designation

Engine all

BF20.00-P-1001-04A

Coolant mixing ratio

Antifreeze/water

Up to -37°C

%

50/50

As of -38 °C

%

55/45

Sheet

BB00.40-P-0310-01A

Sheet

BB00.40-P-0325-00A

Sheet

BB00.40-P-0326-00A