Crankshaft: Service and Repair

Replacing Crankshaft
(Engine Removed)

Remove lower timing case cover, refer to Timing Components, Timing Cover.
Remove all pistons, refer to Piston, Engine, Service and Repair.
Remove end cover at rear; this operation is described in the section Replacing crankshaft radial seal, refer to Crankshaft Main Bearing Seal, Service and Repair.





Checking axial clearance: If permitted end float is exceeded, check crankshaft, guide bearing shells and engine block, replacing if necessary,
End Float, refer to Specifications, Mechanical.





Unfasten screw connection on reinforcement plates.

Note: The reinforcement plates are not fitted on engines with gray cast iron engine blocks or on engines with oil pumps integrated in oil scrapers.





Unfasten screw connection on main bearing.
Remove main bearing caps (1 to 7).
Lever out crankshaft.

If necessary, release incremental gear.

Installation:
Replace screws.
Install screws and tighten down in two passes.
Tightening torque, refer to Specifications, Mechanical.





Caution: Check grinding size of crankshaft, refer to Specifications, Mechanical.

Replace main crankshaft bearing shells, refer to Crankshaft Main Bearing, Service and Repair.
Replace conrod bearing shells, refer to Connecting Rod Bearing, Service and Repair.
Replace grooved ball bearings (Pilot Bearing) in crankshaft, refer to Transmission and Drivetrain, Clutch M/T.