Mount crankshaft radially in bearings

AR03.20-G-4355-01DD

Mount crankshaft radially in bearings

 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-N-5000-01H

Topical note

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

AH00.00-P-0020-01A

Notes on work safety regulations for vehicles with natural gas-powered engines

AH00.10-N-1000-04A

Engine

900.91/92 in model 000.001

Engine

902.91/93 in model 000.001

Engine

904.94/95/96/97 in model 000.001

Engine

906.90/93/94/95/96/98/99 in model 000.001

Engine

924.91/93/94 in model 000.001

Engine

925.9 in model 000.001

Engine

926.91/92/93/95/97/98 in model 000.001

Check values of crankshaft

Number

Designation

ENGINE 900.9

ENGINE 902.9, 906.9 except 906.901/902

BE03.20-N-1001-02K

Main bearing journal Ø

Standard

mm

85,990...86,010

85,990...86,010

Deviation –0.1

mm

85,890...85,910

85,890...85,910

Deviation –0.25

mm

85,740...85,760

85,740...85,760

Deviation –0.5

mm

85,490...85,510

85,490...85,510

Deviation –0.75

mm

85,240...85,260

85,240...85,260

Deviation –1.0

mm

84,990...85,010

84,990...85,010

Check values of crankshaft

Number

Designation

ENGINE 906.901/902

ENGINE 904.9

BE03.20-N-1001-02K

Main bearing journal Ø

Standard

mm

85,990...86,010

85,990...86,010

Deviation –0.1

mm

85,890...85,910

85,890...85,910

Deviation –0.25

mm

85,740...85,760

85,740...85,760

Deviation –0.5

mm

85,490...85,510

85,490...85,510

Deviation –0.75

mm

85,240...85,260

85,240...85,260

Deviation –1.0

mm

84,990...85,010

84,990...85,010

Check values of crankshaft

Number

Designation

Engine 924.9, 925.9, 926.9 in model 000.001

BE03.20-N-1001-02K

Main bearing journal Ø

Standard

mm

85,990...86,010

Deviation –0.1

mm

85,890...85,910

Deviation –0.25

mm

85,740...85,760

Deviation –0.5

mm

85,490...85,510

Deviation –0.75

mm

85,240...85,260

Deviation –1.0

mm

84,990...85,010

Check values of crankshaft

Number

Designation

ENGINE 900.9

ENGINE 902.9, 906.9 except 906.901/902

BE03.20-N-1015-02K

Main bearing inner Ø

Standard

mm

86,066...86,108

86,066...86,108

Deviation 0.1

mm

85,966...86,008

85,966...86,008

Deviation 0.25

mm

85,816...85,858

85,816...85,858

Deviation 0.5

mm

85,566...85,608

85,566...85,608

Deviation 0.75

mm

85,316...85,358

85,316...85,358

Deviation 1.0

mm

85,066...85,108

85,066...85,108

Check values of crankshaft

Number

Designation

ENGINE 906.901/902

ENGINE 904.9

BE03.20-N-1015-02K

Main bearing inner Ø

Standard

mm

86,066...86,108

86,066...86,108

Deviation 0.1

mm

85,966...86,008

85,966...86,008

Deviation 0.25

mm

85,816...85,858

85,816...85,858

Deviation 0.5

mm

85,566...85,608

85,566...85,608

Deviation 0.75

mm

85,316...85,358

85,316...85,358

Deviation 1.0

mm

85,066...85,108

85,066...85,108

Check values of crankshaft

Number

Designation

Engine 924.9, 925.9, 926.9 in model 000.001

BE03.20-N-1015-02K

Main bearing inner Ø

Standard

mm

86,066...86,108

Deviation 0.1

mm

85,966...86,008

Deviation 0.25

mm

85,816...85,858

Deviation 0.5

mm

85,566...85,608

Deviation 0.75

mm

85,316...85,358

Deviation 1.0

mm

85,066...85,108

 Crankcase, timing case cover, end cover

Number

Designation

Engine 900.9, 902.9, 904.9, 906.9 in model 000.001

Engine 924.9, 925.9, 926.9 in model 000.001

BA01.40-N-1001-01M

Bolt, main bearing cap to crankcase

Stage 1

Nm

30

30

Stage 2

Nm

80

80

Stage 3

Nm

155

155

Stage 4

°

90

90

1

Clean the bearing points on the crankshaft with a lint-free cleaning cloth.

2

Measure the main bearing journal diameter (A) with the outside micrometer at two points (offset by about 90°).  

 The dimensions specified in the table must not be exceeded.

If one of the measured values is outside the tolerance:



Machine the crankshaft.

3

Clean the bearing points in the crankcase and the bearing cap (3, 4) with a lint-free cleaning cloth.

4

Insert crankshaft bearing shell (2) in the denoted sequence into the crankcase.

 The locking lugs (A) for crankshaft bearing shells (2) must be located in the crankcase groove. Oil holes in the crankshaft bearing shells (2) and the crankcase must be aligned.

5

Insert crankshaft bearing shells (1) in the denoted sequence into the main bearing caps (3, 4).

 The locking lug (B) for the crankshaft bearing shell (1) must sit in the groove on the main bearing caps (3, 4).

6

Attach main bearing cap (3, 4) to the crankcase and tighten bearing cap screws (6) to the tightening torque.   .

 All bearing caps (3, 4) are inserted into the crankcase at the side, displaced from the middle and are marked with numbers (C). They must be installed in accordance with the numbers, in ascending order, beginning from the engine's output side, and must not be mixed up.

7

 Set the dial indicator and a quick caliper with an outside micrometer with a 5 mm preload to the nominal dimension of the main bearing journal diameter.

8

Use  dial indicator and the quick caliper to measure crankshaft bearing bores in crankcase at three points (E, F, G) (removed vertically and each about 30° away from the connecting points (H)).  

 The specified dimensions must not be exceeded.
Crankshaft bearing shells (1, 2) are supplied from the factory ready to install, and are also available in oversizes for repairs. No reworking is permissible.

If one of the measured values (E, F, G) is outside the tolerance:



Replace the crankshaft bearing shells (1, 2) in accordance with the measured main bearing journal diameter.

9

Remove the bearing caps (3, 4) again.