Tightening procedure for crankcase bottom section

AR01.40-P-3200-01MFF

Tightening procedure for crankcase bottom section

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

Engine

654 in model 118, 177, 247

Modification notes

18.06.2020

Screw, oil pan/crankcase lower section

Engine 654

BA01.40-P-1007-01X

19.06.2020

Turn tensioning screws (21) from above into the crankcase lower section.

Operation step 1.

19.06.2020

Tighten tensioning screws (21).

Operation step 5.

 Crankcase, timing case cover, end cover

Number

Designation

Engine 654

BA01.40-P-1007-01X

Screw/bolt, oil pan/lower crankcase section

to timing case cover

M8

Nm

20

to crankcase

M6

Stage 1

Nm

1

Stage 2

Nm

10

M8

Stage 1

Nm

20

Stage 2

°

90

 Crankcase, timing case cover, end cover

Number

Designation

Engine 654

BA01.40-P-1008-01X

Tensioning screw to crankcase lower section

Nm

6

1

Turn tensioning screws (21) from above into the crankcase lower section and tighten slightly by hand.

2

Tighten screws M6 (1 to 15) in numerical sequence to 1st stage   .

3

Tighten screws M6 (1 to 15) in numerical sequence to 2nd stage   .

4

Tighten screws M6 (1 to 15) in numerical sequence to 2nd stage   .

 Re-tighten screws (1 to 15) again due to settling properties of seal at crankcase lower section.

5

Tighten tensioning screws (21) from below   .

6

Tighten screws M8 (16 to 20) in numerical sequence   .