ar0715b8950b

Remove MR/PLD unit pump, install

Type ar · topic 07.15 · version 0202 · 2020-05-26

Applies to: Engine 457.922/924/928/931

Where it sits

Function group 1 Engine › 07 Mixture formation › 07.15 Diesel injection system (PLN), Engine control (MR)

EinPAS 15 Engine › 15.45 Engine management › 15.45.51 Injection pump/injection timer

Also applies to engines/gearboxes: 457 922, 457 924, 457 928, 457 931

AR07.15-B-8950B

Remove MR/PLD unit pump, install

12.05.2020

Engine

457.922/924/928/931

Remove MR/PLD unit pump, install

1

Nozzle unit

2

O-ring (black)

3

O-ring (brown)

4

Screws

5

Pressure tube

6

Electric lines

6.1

Protective cover

6.2

Screws

6.3

Seals

7

Fuel filter cover

8

O-ring

B07.15-1130-06

Remove MR/PLD unit pump, install

B07.15-1112-09

1

Nozzle unit

5

Pressure tube

2

O-ring (black)

6

Electric lines

3

O-ring (brown)

9

Protective bushing (for installing the O-rings)

4

Screws

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 the pressure tube (5)


.

AR07.15-B-9235TC

Cover connections in the nozzle unit and nozzle holder.

2

Unscrew the fuel filter cap (7)

When unscrewing the filter cap, the fuel will flow to the tank, through the return pipe.

3

Drain the fuel from gallery on the engine block through the inlet and outlet connections


.

AR07.15-B-8950-02B

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

4

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

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

5

Disconnect electrical cables (6) from nozzle unit (1)

Unscrew the protective cover (6.1) by pulling on the flap. Loosen the bolts (6.2) and disconnect the electric lines (6).

6

Mount the turning device to rotate the motor into the flywheel housing


.

AR03.30-B-1600-03A

Do not run the engine before removing the device.

Cranking device

*407589006300

7

Detach the nozzle unit (1) from its housing

Incorrect practice when ejecting the nozzle unit will cause damage to it. The nozzle unit is under the force of the spring and by completely removing the bolts (4), it can be ejected from its housing. If the nozzle unit (1) is gripped (locked), pry properly using an appropriate lever on the side (arrow). Do not extract the unit by the magnetic valve, as it may cause damage.

Loosen the screws approximately 6 mm (4). Slowly rotate the crankshaft so that the camshaft cam pushes the nozzle unit (1) up.

8

Completely loosen the screws (4) and carefully remove the nozzle unit (1)

9

Carefully remove O-rings (2 and 3) from the nozzle unit (1)

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

Check

10

Check nozzle unit (1) for damages

Scratches or shallow grooves on the drive roller are admissible. However, if there are deep scratches, stretch marks or deep abrasion points, the nozzle unit should be replaced.

11

Check the Drive Cam of the nozzle unit camshaft

AR05.20-B-6292-03C

Rotate the camshaft and inspect through the nozzle unit housing.

If necessary, check the elevation of the cam.

Install

12

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

Observe the O-rings channels in the body of the nozzle unit.

Use a clean lint-free cloth.

Do not use burlap.

13

Replace the O-Rings in the nozzle unit (1) and lightly apply heat-resistant grease to bearings


.

AR07.15-B-8950-01TG

Only when reinstalling nozzle units which have already been serviced.

Lightly grease with heat resistant ball bearing grease the body of the nozzle unit and the bore in the cylinder block

High-temperature grease

*BR00.45-Z-1051-06A

Sleeve

*541589011400

14

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

15

Lightly oil the O-rings, the nozzle unit body (1) and the inside of its housing in the engine block

Use engine oil.

16

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

Up to approx. 4 mm before touching the block.

Do not tilt the nozzle unit (1) when inserting it to the engine block.

17

Install the screws (4)

Thread the screws alternately and slowly until the unit touches the block.

Injector pressure pipe, inside the cylinder head

*BA07.15-B-1005-01B

18

Connect electrical cables (6) to nozzle unit (1)

Connect the electrical cables (6) and tighten the screws (6.2) moderately. Fit the protective cover (6.1) and the seals (6.3) correctly.

19

Remove the engine turning device


.

AR03.30-B-1600-03A

Cranking device

*407589006300

20

Screw and tighten the fuel filter cap (7)

Check and, if necessary, replace the O-Ring (8) of the fuel filter cap (7).

Fuel filter cover to the housing

*BA47.20-B-1007-02C

21

Install the pressure tube (5)

AR07.15-B-9235B

Diesel injection system with injection unit (MR/PLD)

Number

Designation

Engine 457.9; 460.9

BA07.15-B-1005-01B

Injector pressure pipe, inside the cylinder head

Nm

40...45

Fuel filter

Number

Designation

Engine 457.9, 460.9, 541.976

BA47.20-B-1007-02C

Fuel filter cover to the housing

Nm

25

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

541 589 01 14 00

Sleeve

407 589 00 63 00

Cranking device

Repair materials

Number

Designation

Order number

BR00.45-Z-1051-06A

High-temperature grease

A 000 989 81 51

Referenced documents