Inspect crankcase

AR01.40-T-9128A

Inspect crankcase

3.4.98



Remove

1

Remove crankshaft

AR03.20-T-4351A

2

Remove cylinder head

AR01.30-T-5800A

3

Remove pistons

AR03.10-T-7021A

4

Remove cylinder liner

AR01.40-T-9324A

5

Remove camshaft bearings

AR05.20-T-7102A



Inspect

6

Inspect contact surface of crankcase for damage and corrosion points

 First of all

- remove dowel sleeve, and

- carefully clean contact surface.

*BE01.40-N-1005-02F

7

Inspect flatness of crankcase contact surface

Inspect flatness of crankcase contact surface with knife-edge straightedge over entire length and diagonally.

If a light gap is formed:

Inspect permissible variation with feeler gage.

 It must not be possible to push feeler gage between crankcase separating surface and straightedge.
If checked in transverse direction, the specified permissible variation is merely a reference value and cannot be measured.

Crankcase - flatness of mating face

*BE01.40-N-1006-02F



*WE58.40-Z-1001-19A



*WH58.30-Z-1007-12A



Measuring

8

Gage cylinder bore

 To do this

- insert dial gage (1) into inside caliper (2),

- use micrometer to set dial gage to the required dimension of the bore diameter at the collar of the cylinder liner and at fit.



*001589532100



*WH58.30-Z-1002-12A

*BE01.40-N-1001-02F

If the specified value is exceeded: 

Replace crankcase

9

Gage camshaft bearings



*001589532100



*WH58.30-Z-1002-12A



*WH58.30-Z-1001-12A

*BE01.40-N-1002-02F

10

Gage crankshaft bearings

 Determining crankshaft bearing radial play.

AR03.20-T-4341-01A



*001589532100



*WH58.30-Z-1001-12A



*WH58.30-Z-1002-12A

If the specified value for the crankshaft radial play is exceeded: 

Replace crankshaft bearing shells, aim for mean value of specified radial play.

 Crankshaft bearing shells are factory-supplied ready for installation. No refacing is permissible.



*BA01.40-N-1002-01H

*BE01.40-N-1003-02F

11

Measure seat depth of cylinder liner in crankcase

AR01.40-T-9304-02A



*001589532100



*343589004000

*BE01.40-N-1005-03D



Install

12

Install camshaft bearings

AR05.20-T-7102A

13

Installing cylinder liner

AR01.40-T-9324A

14

Installing pistons

AR03.10-T-7021A

15

Install cylinder head

AR01.30-T-5800A

16

Install crankshaft

AR03.20-T-4351A

Number

Designation

Engine 447

Engine 489

BE01.40-N-1005-03D

Seat depth of cylinder liner in crankcase

mm

9,98-10,00

9,98-10,00

Number

Designation

Engine 447

Engine 489

BE01.40-N-1001-02F

 cylinder bore

at collar

mm

153,900 - 154,150

153,900 - 154,150

at fit

mm

144,500 - 144,540

144,500 - 144,540

BE01.40-N-1002-02F

 basic bore camshaft bearings

Collar bearing

mm

76,000 - 76,030

76,000 - 76,030

Standard bearing

mm

75,000 - 75,030

75,000 - 75,030

BE01.40-N-1003-02F

 - basic bore of crankshaft bearing

mm

110,000 - 110,022

110,000 - 110,022

BE01.40-N-1005-02F

Peak-to-valley height (Rz) of crankcase

Upper separating surface

μm

0 - 0,016

0 - 0,016

Bottom contact surface

μm

0 - 0,016

0 - 0,016

BE01.40-N-1006-02F

Crankcase - flatness of mating face

Over entire length

mm

0,030

0,030

Over a length of 150 mm in longitudinal and transverse direction

mm

0,015

0,015

Number

Designation

Engine 447

Engine 489

BA01.40-N-1002-01H

Bolt of crankshaft bearing cap to crankcase

1st stage

NM

315

315

2nd stage

°

95

95

Number

Designation

WH58.30-Z-1001-12A

Quick calipers for internal measurements

WH58.30-Z-1002-12A

Micrometer

WH58.30-Z-1007-12A

Steel rule

WE58.40-Z-1001-19A

Straightedge