Measure crankshaft and remount in bearings

AR03.20-B-4355A

Measure crankshaft and remount in bearings

12.02.16



Removal

1

Remove the crankshaft.

AR03.20-B-4351E



Check:

2

Clean the crankshaft.

3

Check the operating area of the front seal, on the crankshaft.

In case of wear and/or damage, install or replace the false race.

AR03.20-B-2570A

4

Check the crankshaft for general conditions

In case of fissures and/or cracks in the crankshaft, replace it.

5

Check the hardness of the main and connecting rod journals, with an appropriated hardness tester

Replace the crankshaft, in case the hardness is below specifications.

*BE03.20-B-1006-02C

6

Check the radial eccentricity of the crankshaft (1).

Support the crankshaft (1) by the outer journals. With the dial gauge (2) and the holder (3), measure the eccentricity on the center journal.

*BE03.20-B-1010-02C



*001589532100



*363589022100

7

Check the main journals and the connecting rod journals on crankshaft (1).

Measure the diameter of the main journals (A) and the connecting rod journals (B), in two points 90ofar one from the other 

Diameter of main journals (A).

*BE03.20-B-1001-02C

Diameter of connecting rod journals (B).

*BE03.20-B-1003-02C

Maximum out of round and taper.

*BE03.20-B-1015-02C

External micrometer

External micrometer

Measure the main journals width (C and D) and the journals of the connecting rods (E) 

Width of the main thrust journal (C).

*BE03.20-B-1002-02C

Width of the main journals (D).

*BE03.20-B-1002-02C

Width of the connecting rod journals (E).

*BE03.20-B-1011-02C

Measure the tangential radius (F) and the hogback (G) of the main journals and the connecting rod journals 

Fillet radius on the journals (F).

*BE03.20-B-1012-02C

Convexity on the journals (G).

*BE03.20-B-1013-02C

 Machine the crankshaft (1), in case the values are not within the specifications.

AR03.20-B-4465B

8

Check the inside diameter (H) of the main bearing shells

To obtain the required radial clearance, the diameter of the bearing shells and the crankshaft journals, must comply with the prescribed tolerance range and to belong to the same repair stage.

AR03.20-B-4355-01A

Diameter of main journals (A).

*BE03.20-B-1001-02C

Inside diameter (H) of the installed main bearing shells.

*BE03.20-B-1007-02C



*BA01.40-B-1004-01H



*001589532100

Inner diameters gauge

External micrometer

9

Check the width (J) of the axial thrust bearing shells

To obtain the required axial clearance, the width of the bearing shells and the thrust journal of the crankshaft, must comply with the prescribed tolerance range and belong to the same repair stage.

AR03.20-B-4355-02B

Width of the main thrust journal (C).

*BE03.20-B-1002-02C

Width of the thrust bearing shells (J).

*BE03.20-B-1014-02C



Installing

10

Install the crankshaft.

AR03.20-B-4351E

Número

Denominação

Engine 457.9 without CODE MS5

BE03.20-B-1001-02C

Diameter of the main neck

Normal

mm

103.980...104.000

Normal I

mm

103.880...103.900

Repair I

mm

103.730...103.750

repair II

mm

103.480...103.500

repair III

mm

103.230...103.250

repair IV

mm

102.980...103.000

BE03.20-B-1002-02C

Width

of the main adjustment neck

Normal

mm

46.000...46.062

Repair I

mm

46.500...46.562

repair II

mm

47.000...47.062

of the other main necks

mm

-

BE03.20-B-1003-02C

Connecting rod neck diameter in the crankshaft

Normal

mm

89.980...90.000

Normal I

mm

89.880...89.900

Repair I

mm

89.730...89.750

repair II

mm

89.480...89.500

repair III

mm

89.230...89.250

repair IV

mm

88.980...89.000

BE03.20-B-1006-02C

Hardness of the main necks and the connecting rods' necks (Rockwell hardness)

minimum

HRC

53...59

BE03.20-B-1007-02C

Internal diameter of sleeves of the main necks (assembled)

Normal

mm

104.060...104.106

Normal I

mm

103.960...104.006

Repair I

mm

103.810...103.856

repair II

mm

103.560...103.606

repair III

mm

103.310...103.356

repair IV

mm

103.060...103.106

BE03.20-B-1010-02C

Crankshaft eccentricity (supported on the external main necks)

Maximum

mm

0.09

BE03.20-B-1011-02C

Connecting rod neck width

Normal

mm

46.0...46.1

repair

mm

-

BE03.20-B-1012-02C

Necks matching radius

main

mm

4.2...4.5

connecting rods

mm

3.7...4.0

BE03.20-B-1013-02C

Main necks and connecting rods bulging

mm

0...0.004

BE03.20-B-1014-02C

Main sleeves of axial adjustment width

Normal

mm

45.74...45.81

Repair I

mm

46.24...46.31

repair II

mm

46.74...46.81

BE03.20-B-1015-02C

Maximum roundness and taper in the main and connecting rod necks

Limit for reuse

mm

0.02

new or machined crankshaft

mm

0.01

Número

Denominação

Engine 457.9

BA01.40-B-1004-01H

Bearing cap bolt in the crankshaft

1st stage

Nm

300...330

2nd stage

angular

90°...100°