Detach/attach lower crankcase section

AR01.40-S-3200-02EA

Detach/attach lower crankcase section

 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 threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

Engine

654.9 in model 447

Modification notes

29.05.2020

Work procedure revised.

The whole document

 Crankcase, timing case cover, end cover

Number

Designation

Engine 654.9 in model 447

BA01.40-N-1004-01EA

Bolt, lower crankcase section to crankcase

Stage 1

Nm

10

Stage 2

°

5

 Crankcase, timing case cover, end cover

Number

Designation

Engine 654.9 in model 447

BA01.40-N-1005-01EA

Bolt, crankcase lower section to crankshaft bearing cap

Stage 1

Nm

20

Stage 2

°

90

 Crankcase, timing case cover, end cover

Number

Designation

Engine 654.9 in model 447

BA01.40-N-1006-01EA

Tensioning screw to crankcase lower section

Nm

6

1

Remove screws (1 to 20) in reverse numerical order.

2

Pry off crankcase lower section and remove.

 Do not use any sharp-edged objects.
The sealing surfaces may be damaged and leaks may occur otherwise.

Shown on the removed crankcase lower section

3

Screw in screws (1 to 15) in numerical order lightly by hand until the bolt heads are in contact with the crankcase lower section.

4

Tighten screws (1 to 15) in numerical order to stage 1 torque  .

5

Tighten screws (1 to 15) in numerical order with the tightening angle of stage 2  .

 Commercially available devices/tools
Electronic torque wrench / angle tightener

Shown on the removed crankcase lower section

6

Tighten tensioning screws (21) from below   .

 Tensioning screws (21) must be in contact with the crankshaft bearing caps; observe the direction of rotation of each tensioning screw (21) here.

Shown with crankcase lower section installed

7

Tighten screws (16 to 20) in numerical order to stage 1 torque  .

8

Tighten screws (16 to 20) in numerical order with the tightening angle of stage 2  .

 Commercially available devices/tools
Electronic torque wrench / angle tightener

Shown on the removed crankcase lower section