Remove oil from cooling and heating system

AR20.00-S-1250S

Remove oil from cooling and heating system

12.11.2018

Model

636 with engine 646

Model

639 with engine 112, 646

Model

906 with engine 646.984/985/986/989/990

Modification notes

22.07.2015

Repair materials modified

Step 5

Shown on engine 646.982

1

Expansion reservoir

2

Cap

3

Drain screw

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

 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

Notes on coolant level

AH20.00-P-1142-01CW



Remove

1

Remove coolant thermostat housing

Model 639 with engine 112

AR20.10-S-2710SV

Model 636, 639 with engine 646

AR20.10-S-2710SD

Model 906 with engine 646.984/985/986/989/990

AR20.10-D-2710SD

2

Install housing to remove oil from engine cooling system



De-oil housing for radiator and heating system

Model 639 with engine 112

WF58.50-S-2000-01SV



De-oil housing for radiator and heating system

Model 636, 639 with engine 646
Model 906 with engine 646.984/985/986/989/990

WF58.50-S-2000-01SD

 The housing may be used only for the purpose of removing the oil and must be removed again after it has been rinsed.

 Model 639 with engine 112Bolt, coolant thermostat housing to timing case cover

*BA20.10-P-1003-01M

 Model 636, 639 with engine 646
Model 906 with engine 646Bolt, coolant thermostat housing to cylinder head

*BA20.10-N-1002-01Q



Clean

3

Set heater controls to full output

4

Switch auxiliary heater to full capacity

Model 636, 639, 906 with code H12 (Auxiliary water heater) Model 636, 639 with code H13 (Additional heat exchanger at the rear) Model 906 with code H13 (Additional heat exchanger in passenger compartment/cargo area)

5

Fill engine cooling system with flushing solution

 Mix the cleaner to make a 5% flushing solution (10 l water, 0.5 l cleaner) to de-oil the engine cooling system.

Cleaner for engine and cooling system for oil drag-in, 10 l

*BR00.45-Z-1009-04A

6

Warm up engine to operating temperature at medium rotational speed

 While engine is running, maintain operating temperature at about 80°C for about 5 min.

7

Switch off engine and allow engine cooling system to cool down to approx. 50°C

8

Drain off flushing solution fully at the drain screw (3)

 Observe environmental protection regulations of cleaner manufacturer.

9

Fill engine cooling system with fresh water

 Fill fresh water into the expansion reservoir (1).

10

Warm up engine to operating temperature at medium rotational speed

 While engine is running, maintain operating temperature at about 80°C for about 5 min.

11

Switch off engine and allow engine cooling system to cool down to approx. 50°C

12

Drain off fresh water at the drain screw (3)

 Observe environmental protection regulations of cleaner manufacturer.

If necessary



If necessary, repeat rinsing procedure with fresh water so that all rinsing solution is removed

13

Install housing to remove oil from engine cooling system



Install

14

Install coolant thermostat housing

Model 639 with engine 112

AR20.10-S-2710SV

Model 636, 639 with engine 646

AR20.10-S-2710SD

Model 906 with engine 646.984/985/986/989/990

AR20.10-D-2710SD

 Coolant pump, coolant thermostat

Number

Designation

Engine 646 in model 636, 639

Engine 646 in model 906

BA20.10-N-1002-01Q

Bolt, coolant thermostat housing to cylinder head

Nm

8

8

 Coolant pump, coolant thermostat

Number

Designation

Engine 112.951/976

BA20.10-P-1003-01M

Bolt, coolant thermostat housing to timing case cover

M6

Nm

14

Repair materials

Number

Designation

Order number

BR00.45-Z-1009-04A

Cleaner for engine and cooling system for oil drag-in, 10 l

A 002 986 42 71