Remove/install crankshaft

AR03.20-P-4351FG

Remove/install crankshaft

30.01.2019

Engine

639.9 in model 454.0

1

Crankshaft

2

main bearing shells of the cylinder crankcase

3

Thrust plate in crankcase

4

Main bearing shells of the bearing cap

5

thrust plates of the bearing cap

6

Crankshaft bearing cap

7

Screw



Remove

1

Remove engine with transmission

AR01.10-P-2401FG

2

Remove crankshaft gear

AR05.10-P-4600FG

3

Remove end cover together with radial shaft sealing ring

AR01.40-P-8920FG

4

Remove connecting rod with piston

AR03.10-P-7021FG

 Do not disconnect connecting rod and piston.

5

Loosen and unscrew the screws (7), starting from the outside

 Use commercially available double-hexagon socket wrench socket, size 14.

6

Remove the crankshaft bearing cap (6) with the main bearing shells of the bearing cap (4) and the thrust plates of the bearing cap (5)

 The crankshaft bearing caps (6) are numbered consecutively, beginning at the first crankshaft bearing cap (6) at the front on the timing case cover.
Assign the main bearing shells of the bearing cap (4) and the thrust plates of the bearing cap (5) to the correct crankshaft bearing cap (6).

7

Take crankshaft (1) out of cylinder crankcase

8

Remove the main bearing shells of the cylinder crankcase (2) and thrust plates of the cylinder crankcase (3) from the cylinder crankcase

 Assign the main bearing shells of the cylinder crankcase (2) and the thrust plates of the cylinder crankcase (3) to the correct crankshaft bearing.



Install

9

Assign the main bearing shells of the bearing cap (4) and thrust plates of the bearing cap (5) to the crankshaft bearing caps (6) and insert them. Assign the main bearing shells of the cylinder crankcase (2) and thrust plates of the cylinder crankcase (3) to the cylinder crankcase and insert them

AR03.20-P-4360-01AL

Bearing diagram for crankshaft

AH03.20-P-4351-01FG

 Lubricate the main bearing shells of the cylinder crankcase (2) and the main bearing shells of the bearing cap (4) with engine oil.
The oil grooves in the thrust plates of the cylinder crankcase (3) and the thrust plates of the bearing cap (5) must point to the thrust collars of the crankshaft (1).
The thrust plates of the bearing cap (5) are protected from angular movement in the crankshaft bearing cap (6) by a retaining lug.

10

Insert crankshaft (1) into the cylinder crankcase

11

Place the crankshaft bearing cap (6) with the main bearing shells of the bearing cap (4) and the thrust plates of the bearing cap (5) in position, and tighten with screws (7)

Interference fit of crankshaft bearing cap

AH03.20-P-4351-02MM

 The crankshaft bearing caps (6) are numbered consecutively, beginning at the first crankshaft bearing cap (6) at the front on the timing case cover.
Note the fit of the crankshaft bearing caps (6).
Lubricate the screws (7) of the crankshaft bearing caps (6) on the thread and the screw head contact surface with engine oil. Tighten the screws (7) from the inside to the outside.
Turn crankshaft (1) in direction of engine rotation and check for ease of movement.
Use commercially available double-hexagon socket wrench socket, size 14.

 Screw/bolt, crankshaft bearing cap to cylinder crankcase

*BA03.20-P-1001-01I

12

Install connecting rod with piston

AR03.10-P-7021FG

13

Install end cover together with radial shaft sealing ring

AR01.40-P-8920FG

14

Install crankshaft gear

AR05.10-P-4600FG

15

Install engine with transmission

AR01.10-P-2401FG

 Crankshaft

Number

Designation

ENGINE 639.939

BA03.20-P-1001-01I

Screw/bolt, crankshaft bearing cap to cylinder crankcase

Stage 1

Nm

55

Stage 2

°

90