Mount crankshaft axially

AR03.20-D-4355-02R

Mount crankshaft axially

ENGINE

646 in MODEL 909

Test specifications for crankshaft bearing clearance

Number

Designation

ENGINE 646 in MODEL 909

BE03.20-N-1001-04B

Crankshaft bearing clearance (when new)

Radial measurement when new

mm

0,027...0,051

radial wear limit

mm

0,08

Axial measurement when new

mm

0,100...0,254

axial wear limit

mm

0,3

1

Measure width of fitted bearing at cylinder crankcase and at fitted bearing cap and note it down.

2

Measure width of fitted bearing at crankshaft and note it down.

3

Determine thickness of thrust washer.

 Add crankshaft bearing axial play to fitted bearing width at cylinder crankcase and then subtract from fitted bearing width on the crankshaft.

4

Put on thrust plate.

 In cylinder crankcase and fitted bearing cap, thrust plates of the same thickness must always be inserted on both sides.

 The oil grooves (arrows) must be pointing toward the contact surface of the crankshaft and be oiled. The anti-twist lock is positioned against the thrust plate in the fitted bearing cap.

5

Measure crankshaft bearing axial play and correct if necessary.

  Attach dial indicator holder with  dial indicator to contact surface of end cover.  Pre-tension dial indicator and then set to position 0. Insert a suitable screwdriver between fitted bearing cap and crank web and then move crankshaft to the left or right. Read off measured value on  dial indicator and install different thrust plates if necessary. Then repeat the measurement.