Remove/install slide/tensioning rail

AR05.10-S-8426EA

Remove/install slide/tensioning rail

11.10.2019

Engine

654.9 in model 447

1

Slide/tensioning rail

1.1

Slide rail (timing chain (3))

1.2

Tensioning rail (bush chain of the oil pump (4))

2

Bearing pin

3

Timing chain

4

Bush chain of the oil pump

 Warning

Risk of injury caused by pinching or crushing when working on springs or spring bodies that are under tension

Use only approved tensioning devices; additionally screen off hazardous area if necessary. Check special tools for damage and proper operation (visual inspection). Wear protective gloves.

AS00.00-Z-0001-01A

 Warning

Risk of injury. Moving parts can pinch, crush or, in extreme cases even sever extremities.

No parts of the body or limbs should be within the operating area of mechanical components when moving components.

AS00.00-Z-0009-01A

 Caution

Risk of injury to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil

Wear protective gloves, protective clothing and safety glasses.
Do not fill engine oil into beverage containers.

AS18.00-Z-0001-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A



Remove

1

Remove timing case cover.

AR01.40-S-8000EA

2

Tension tensioning rail (1.2) and secure.

AR05.10-S-8426-02EA

 As a result of the tensioning rail (1.2) being tensioned, the bush chain of the oil pump (4) is slackened.

 The slide/tensioning rail (1) is a combination of the slide rail (1.1) and the tensioning rail (1.2).

3

Remove bearing pins (2) and remove the slide/tensioning rail (1).



Check

4

Check slide/tensioning rail (1) for wear, galling, and damage.

If there is a problem,



Clamp slide/tensioning rail (1) into a vise, release tensioning rail (1.2), slacken, and replace slide/tensioning rail (1).

AR05.10-S-8426-01EA

 Dispose of the slide/tensioning rail (1) only when it is slackened.

 Installation: The new part of the slide/tensioning rail (1) is delivered while tensioned and may be slacked only after installation on the engine. Otherwise, installation is not possible.



Install

5

Position slide/tensioning rail (1) on the timing chain (3) and on the bush chain of the oil pump (4).

6

Screw in bearing pins (2).

 Bearing pin, slide rail/tensioning rail to crankcase

*BA05.10-N-1006-03EA

7

Release tensioning rail (1.2) and slacken.

AR05.10-S-8426-01EA

 As a result of the tensioning rail (1.2) being slackened, the bush chain of the oil pump (4) is tensioned.

8

Install timing case cover.

AR01.40-S-8000EA

 Chain drive, belt drive

Number

Designation

Engine 654.9 in model 447

BA05.10-N-1006-03EA

Bearing pin, slide rail/tensioning rail to crankcase

Nm

25