Remove/install engine control (MR) control unit

AR07.15-G-1630DD

Remove/install engine control (MR) control unit

04.09.2019

Engine

900.9 in model 000.001

Engine

902.9 (except 902.90) in model 000.001

Engine

904.9 in model 000.001

Engine

906.9 (except 906.90) in model 000.001

Engine

924.9 in model 000.001

Engine

925.9 in model 000.001

Engine

926.9 in model 000.001

2

Electrical connector

3

Electrical connector

4

Electrical connector

5

Banjo bolt

6

Fuel filter

7

Rubber damper

8

Engine control (MR) control unit

 Danger

Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contactwith fuel.

No fires, sparks, open flames or smoking. Pour fuels into suitable and appropriately marked containers only.
Wear protective clothing when handling fuel.

AS47.00-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

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Note on calculation of tightening torque when using insertion or socket tools with various effective lengths

AH00.00-P-0015-01CW

 

Remove/install

1

Remove banjo bolt (5) from fuel filter (6).

 Collect escaping fuel.

 Installation: Install new sealing rings.

 Banjo bolt, fuel line to fuel filter housing

*BA47.20-N-1004-02I

2

Detach electrical connection (2) from engine control (MR) control unit (8).

3

Disconnect electrical connection (3) from engine control (MR) control unit (8).

 Swivel upwards to release the securing clip of electrical connection (3).

4

Disconnect electrical connection (4) from engine control (MR) control unit (8).

 Swivel downwards to release the securing clip of electrical connection (4).

5

Remove and take out engine control (MR) control unit (8) with rubber damper (7).

 Do not disassemble engine control (MR) control unit (8).

 Installation: Attach rubber damper (7) to engine control (MR) control unit (8) using grease.

 Screw, control unit (MR/PLD) to crankcase

*BA07.15-N-1002-01D

Grease, silicone-based, 100 g

*BR00.45-Z-1008-06A

6

Install in the reverse order

7

Perform engine test run, switch off engine, and check in the area of fuel filter (6) for leak tightness.

 See information from body manufacturer.
Start engine with starter for max. 90 s. Wait at least for about 2 minutes before repeating attempt at starting.
The fuel system is bled automatically.

 Diesel injection system with unit pumps (MR/PLD)

Number

Designation

Engine 900.9, 902.9 (except 902.90), 904.9, 906.9 (except 906.90) in model 000.001

Engine 924.9, 925.9, 926.9 in model 000.001

BA07.15-N-1002-01D

Screw, control unit (MR/PLD) to crankcase

Nm

15

15

 Fuel filter

Number

Designation

Engine 900.9, 904.9 in model 000.001, engine 902.9, 906.9 in model 000.001 except natural gas engine

Engine 924.9, 925.9, 926.9 in model 000.001

BA47.20-N-1004-02I

Banjo bolt, fuel line to fuel filter housing

Nm

45

45

Repair materials

Number

Designation

Order number

BR00.45-Z-1008-06A

Grease, silicone-based, 100 g

A 001 989 28 51