ar0715b8950a

Remove MR/PLD unit pump, install

Type ar · topic 07.15 · version 0104 · 2020-05-13

Applies to: Engine 904.9, 906.9, 924.9, 926.9 in model 368.0/1, 382.1, 384.06/07, 634.0, 685.282/284/289/290, 979.2

Where it sits

Function group 1 Engine › 07 Mixture formation › 07.15 Diesel injection system (PLN), Engine control (MR) — Series 368 (models 0**, 1**) · Series 382 (models 1**) · Series 384 (models 06*, 07*) · Series 634 (models 0**) · Series 685 (models 282, 284, 289, 290) · Series 904 (models 9**) · Series 906 (models 9**) · Series 979 (models 2**)

EinPAS 15 Engine › 15.45 Engine management › 15.45.51 Injection pump/injection timer — Series 368 (models 0**, 1**) · Series 382 (models 1**) · Series 384 (models 06*, 07*) · Series 634 (models 0**) · Series 685 (models 282, 284, 289, 290) · Series 904 (models 9**) · Series 906 (models 9**) · Series 979 (models 2**)

Also applies to engines/gearboxes: 924 9**, 926 9**

AR07.15-B-8950A

Remove MR/PLD unit pump, install

12.05.2020

Engine

904.9, 906.9, 924.9, 926.9 in model 368.0/1, 382.1, 384.06/07, 634.0, 685.282/284/289/290, 979.2

Remove MR/PLD unit pump, install

1

Injection unit

2

O-ring (black)

3

O-ring (green or brown)

4

O-ring

5

Screws

6

Injection pipe

7

Electric wires

B07.15-1084-06

Remove MR/PLD unit pump, install

1

Injection unit

2

O-ring (black)

3

O-ring (green or brown)

4

O-ring

5

Screws

8

Protective bushing for installing O-rings

9

Guides for installing the injection unit

B07.15-1085-06

Remove

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

1

Remove injection pipe (6)


.

AR07.15-B-9235A

Cover connections in the injection unit and injector holder.

2

Draining fuel from engine block gallery


.

AR07.15-B-8950-02A

Procedure necessary to avoid contamination by fuel and lubricating oil in the crankcase.

3

Clean with special attention to injection unit to be removed and the entire surrounding area

In case of removing more than one injection unit, identify them according to the corresponding cylinder.

4

Mount the device to rotate the motor into the flywheel housing


.

AR03.30-B-1600-03A

Do not run the engine before removing the device.

Turning device

*904589046300

5

Disconnect electrical cables (7) from injection unit (1)

When necessary, additionally remove the bracket with the engine start and shut off auxiliary buttons.

6

Detach the injection unit (1) from its housing


Take care when leveraging the injector unit.
Incorrect practice when ejecting the injection unit will cause damage to it.

Loosen the screws approximately 6mm (5).

Slowly rotate the crankshaft so that the camshaft cam push the injection unit (1) up.

If the injection unit (1) is gripped (locked) in its housing, work properly with an appropriate lever on the side (arrow).

7

Completely loosen the screws (5) and carefully remove the injection unit (1)

8

Carefully remove O-rings (2, 3 and 4) from the injection unit (1)

Do not damage the O-rings channels in the injection unit.

Check

9

Check injection unit (1) for damages

Scratches or stretch marks on the drive roller are permissible. However, if there are scratches, stretch marks or deep abrasion points, the injection unit should be replaced.

10

Check the Drive Cam of the injection unit camshaft


.

AR05.20-B-6292-03A

Rotate the camshaft and inspect through the injection unit housing.

If necessary, check the rising cam in the camshaft.

Install

11

Clean the body of the injection unit and the housing on the engine block

Observe the channels for O-rings in the body of the injection unit.

Use a clean lint-free cloth.

Do not use burlap.

12

Replace the O-Rings in the injection unit and lightly apply grease to heat-resistant bearings


.

AR07.15-B-8950-01TJ

Only when reinstalling injection units which have already been serviced.

Lightly grease the injection unit and engine block hole with heat resistant grease for bearings.

High-temperature grease

*BR00.45-Z-1051-06A

Sleeve

*904589031400

13

Rotate the crankshaft until the camshaft cam, corresponding to the unit to be installed, is positioned on the basic circle

14

Lightly oil the O-rings, the body of the injection unit and the inside of its housing in the engine block

Use engine oil.

15

Install the guides (9) in the tapped holes for fixing the injection unit

Assembly pins for installing unit pump

WF58.50-B-0715-01A

The guides prevent the O-rings (2 and 3) from being damaged by introducing the injection unit to the housing.

16

Enter the injection unit (1) in its housing, pushing it manually, overcoming the spring pressure

Up to a distance of approx. 4 mm before touching the block.

Using the supply duct (bushing) as reference for positioning the unit.

17

Install the bolts (5)

Remove the guides (9).
Tighten the screws (5) alternately and slowly, until the injection unit touches the block.

.Engine block injection unit

*BA07.15-B-1001-01A

18

Connect electrical cables (7) to injection unit (1)

Install the bracket with the engine start and stop auxiliary buttons, in case they have been removed.

19

Remove the engine turning device


.

AR03.30-B-1600-03A

Turning device

*904589046300

20

Bleed the fuel system

Bleed fuel system

.

AP47.00-B-1720-01C

Act on the handle of the hand primer pump until strong resistance is observed.

21

Mount the injection pipe (6)


.

AR07.15-B-9235A

Diesel injection system with injection unit (MR/PLD)

Number

Designation

Engine 904.9, 906.9, 924.9, 926.9

BA07.15-B-1001-01A

Engine block injection unit

Nm

65

Remove MR/PLD unit pump, install
Remove MR/PLD unit pump, install

904 589 04 63 00

Turning device

904 589 03 14 00

Sleeve

Repair materials

Number

Designation

Order number

BR00.45-Z-1051-06A

High-temperature grease

A 000 989 81 51

Referenced documents