Remove/install coolant feed line for boost pressure regulator

AR20.20-D-0002TSM

Remove/install coolant feed line for boost pressure regulator

20.02.2020

Engine

654.9 in model 907.1/2/6

except code MU6 (OM 654 DE 20 LA 140 kW (190 hp) 3800 rpm)

1

Coolant feed line

6

Screw

2

Turbocharger oil feed line

7

Coolant pipe

3

Screw

8

Heat shield foil

4

Boost pressure positioner

9

Clamp

5

Screw

10

Coolant hose

1

Coolant feed line

11

O-ring

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

 

Remove/install

1

Drain off coolant.

AR20.00-D-1142TSM

2

Remove oil feed line of the exhaust gas turbocharger (2) from the exhaust gas turbocharger and place to one side.

AR09.40-D-6022TSM

 Do not remove oil feed line of the exhaust gas turbocharger (2) completely.

3

Remove screw (3) and remove coolant feed line (1) from the boost pressure regulator (4).

 Screw, coolant feed pipe for boost pressure regulator to boost pressure regulator

*BA20.20-N-1006-02TSM

4

Seal openings with suitable stop plug.

 Record plug

*129589009100

5

Remove screw (5).

 Screw, coolant feed pipe for boost pressure regulator to exhaust gas turbocharger

*BA20.20-N-1007-02TSM

6

Remove screw (6) and remove coolant feed line (1) from the coolant pipe (7).

 Screw, coolant feed pipe for boost pressure regulator/coolant return line for turbocharger to coolant line

*BA20.20-N-1008-02TSM

7

Seal openings with suitable stop plug.

 Record plug

*129589009100

8

Open heat shield foil (8).

9

Open clamp (9), remove coolant feed line (1) from the coolant hose (10), and remove.

 Hose clamp pliers

*454589003700

10

Seal openings with suitable stop plug.

 Record plug

*129589009100

11

Remove O-rings (11) from the coolant feed line (1).

Of the coolant feed line (1) is reused.

 Installation: Install new O-rings (11).

 Assembly tool

*000589936300



Check

12

Check coolant feed line (1) for damage.

If damage is detected:



replace coolant feed line (1).

13

Install in the reverse order.



Check

 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

14

Perform engine test run.

 Engine radiator, coolant hoses and lines

Number

Designation

Engine 654.9 in model 907

BA20.20-N-1006-02TSM

Screw, coolant feed pipe for boost pressure regulator to boost pressure regulator

Stage 1

Nm

8

Stage 2

°

30

 Engine radiator, coolant hoses and lines

Number

Designation

Engine 654.9 in model 907

BA20.20-N-1007-02TSM

Screw, coolant feed pipe for boost pressure regulator to exhaust gas turbocharger

Stage 1

Nm

8

Stage 2

°

30

 Engine radiator, coolant hoses and lines

Number

Designation

Engine 654.9 in model 907

BA20.20-N-1008-02TSM

Screw, coolant feed pipe for boost pressure regulator/coolant return line for turbocharger to coolant line

Stage 1

Nm

8

Stage 2

°

30