Remove/install high-pressure exhaust gas turbocharger boost pressure regulator

AR09.40-P-1021OLN

Remove/install high-pressure exhaust gas turbocharger boost pressure regulator

17.08.2020

Engine

654.8 in model 213, 238, 257

with code M014 (Engine uprated)

2

Bleed line

3

Oil separator

4

Upper coolant line feed line

5

Screws

B157/2

Low-pressure exhaust gas recirculation temperature sensor

Y27/7

Low-pressure exhaust gas recirculation actuator

Y77/1

Boost pressure control pressure transducer

A

Link rod

C

Plain coupler

 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

 Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

Topical note

Notes on coolant

AH20.00-N-2080-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

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.

Engine 654.8 in model 257
with code M014 (Engine uprated)

AR20.00-P-1142OIB

Engine 654.8 in model 213, 238
with code M014 (Engine uprated)

AR20.00-P-1142OLC

 Installation: Only install engine compartment lining after leak test.

2

Remove air intake line upstream of exhaust gas turbocharger.

AR09.40-P-0500OLC

 Installation: Do not install engine cover until after the leak test.

3

Release and disconnect the electrical connectors from the bleed line (2) and the boost pressure control pressure transducer (Y77/1).

4

Remove electrical wiring harness up to low-pressure exhaust gas recirculation actuator (Y27/7) and low-pressure exhaust gas recirculation actuator temperature sensor (B157/2).

5

Remove bleed line (2) on the oil separator (3).

6

Remove upper coolant line feed line (4) from the boost pressure control pressure transducer (Y77/1).

AR20.20-P-1000OL

 Installation: Replace seals.

7

Remove the link rod (A) from the boost pressure control pressure transducer (Y77/1).

8

Unscrew screws (5) and remove the boost pressure control pressure transducer (Y771).

 Installation: Replace the retaining washer for the link rod (A).
Replace plain coupler (C).

 Screw, E-actuator to exhaust gas turbocharger

*BA09.40-P-1026-02B

9

Install in the reverse order.

Concluding tasks

 Warning

Risk of burn injuries, suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning caused by skin contact with solid components of the exhaust.

Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area.

AS49.00-Z-0001-01A

 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

10

Perform engine test run. While doing so, check engine for proper operation and leak tightness.

 Turbocharger

Number

Designation

Engine 654 in model all
with code M014 (Engine uprated)

BA09.40-P-1026-02B

Screw, E-actuator to exhaust gas turbocharger

Stage 1

Nm

8

Stage 2

°

20