Measure crankshaft and remount in bearings

AR03.20-D-4355WE

Measure crankshaft and remount in bearings

04.09.2018

Engine

651 in model 900

Engine

651.955/956/957 in model 906

Modification notes

29.02.2016

Crankshaft crank pin dia. (HZ)

BE03.20-N-1003-02P

16.03.2016

Basic data address altered

Operation step 5

1

Crankshaft

2

Bearing shell (crankshaft bearing cap)

3

Fitted bearing shell with thrust plates (thrust bearing in crankshaft bearing cap)

4

Bearing shell (crankcase)

5

Fitted bearing shell with thrust plate (thrust bearing in crankcase)

A

Crankshaft bearing shell in crankcase

B

Crankshaft bearing shells in crankshaft bearing cap



Remove

1

Remove crankshaft (1)

AR03.20-D-4351WE



Clean

2

Clean engine parts

 If bearing damage has occurred, it may be necessary to remove any swarf from the oil duct, the conrod bore holes and crankshaft oil ducts (1) and the crankcase.

Cold degreasing agent/cold cleaning solvent HAKU 1025-920

*BR00.45-Z-1051-04A



Check

3

Check connecting rod for damage and mechanical stress

Only if bearing damage has occurred.

 The connecting rods should not have lateral grooves or notches or other damage.

 If discolored, additionally check crankshaft (1).

Connecting rods overheated from bearing damage (discoloration) or damaged, must be replaced.



Remove/install piston

AR03.10-D-7021WE

4

Check main bearing journals and connecting rod journal on crankshaft (1) for damage and wear

 Replace a damaged or worn crankshaft (1). Replace bearing shells (2, 4) and fitted bearing shells with thrust plates (3, 5) or replace engine.



Measure

5

Measure main bearing radial play, main bearing axial bearing play and connecting rod journal of crankshaft (1)

AR03.20-D-4341-01WE

 If radial play or axial bearing clearance is too high, remove crankshaft (1) and determine repair measures.

 If main bearing journal or connecting rod journal dimensions are too low, replace crankshaft (1) or engine.

Crankshaft journal width at fit bearing

*BE03.20-N-1002-02P

Crankshaft crank pin Ø (HZ)

*BE03.20-N-1003-02P

Crankshaft sliding bearing pins Ø (GZ)

*BE03.20-N-1001-02P

Crankshaft bearing clearance (when new)

*BE03.20-N-1001-04B

 Bolt, crankshaft bearing cap to crankcase

*BA03.20-N-1001-01J

 Dial gage

*001589322100

When tightening screw/bolts on crankshaft bearing cap, observe tightening procedure for crankshaft bearing cap.



Tightening procedure for crankshaft bearing caps

AR03.20-D-4351-02WE

Mount crankshaft on bearing

6

Assign crankshaft bearing shells in crankcase (A) and crankshaft bearing shells in crankshaft bearing cap (B)

Only when replacing bearing shells (2, 4)and fitted bearing shells with thrust plates (3, 5) or crankshaft (1).

Bearing diagram for crankshaft

AH03.20-N-4351-01WE

AR03.20-D-4360-01WE



Install

7

Install crankshaft (1)

AR03.20-D-4351WE

Check values of crankshaft

Number

Designation

Engine 651 in model 639, 900, 906

BE03.20-N-1001-02P

Crankshaft sliding bearing pins Ø (GZ)

Nominal Ø

GZ 1

mm

59,922...59,947

GZ 2, 3, 4, 5

mm

59,940...59,965

Repair stage 1 blue (b)

GZ 1

mm

59,938...59,947

GZ 2, 3, 4, 5

mm

59,956...59,965

Repair stage 2 yellow (g)

GZ 1

mm

59,930...59,938

GZ 2, 3, 4, 5

mm

59,948...59,956

Repair stage 3 red (r)

GZ 1

mm

59,922...59,930

GZ 2, 3, 4, 5

mm

59,940...59,948

Test specifications for crankshaft bearing clearance

Number

Designation

Engine 651 in model 639, 900, 906

BE03.20-N-1001-04B

Crankshaft bearing clearance (when new)

Radial measurement when new

mm

0,028...0,063

Radial wear limit

mm

-

Axial measurement when new

mm

0,110...0,300

Axial wear limit

mm

-

Check values of crankshaft

Number

Designation

Engine 651 in model 639, 900, 906

BE03.20-N-1002-02P

Crankshaft journal width at fit bearing

Identification colorless / 0

mm

26,500...26,540

Check values of crankshaft

Number

Designation

Engine 651 in model 639, 900, 906

BE03.20-N-1003-02P

Crankshaft crank pin Ø (HZ)

mm

51,940...51,965

 Crankshaft

Number

Designation

Engine 651 in model 639, 906

Engine 651 in model 900

BA03.20-N-1001-01J

Bolt, crankshaft bearing cap to crankcase

M11

Stage 1

Nm

-

-

Stage 2

°

-

-

M12

Stage 1

Nm

60

60

Stage 2

°

90

90

Repair materials

Number

Designation

Order number

BR00.45-Z-1051-04A

Cold degreasing agent/cold cleaning solvent HAKU 1025-920

Chemische Werke Kluthe GmbH
Gottlieb-Daimler-Str. 12
69115 Heidelberg
Germany
Tel. +49 6221 5301-0
Fax +49 6221 5301-176
http://kluthe.com