Crankshaft
• Forged
• Bolt-on counterweights
• Press-fitted crankshaft gear
• Low-wear sleeve bearings, oil supply from lube-oil system
• Axial fixing by thrust bearing
• Radial-lip shaft seals for sealing against external influences (driving end and free end)
Vibration damper (free end)
• Torsional-vibration damper with hydraulic damping
• Oil supply from lube oil system
Flywheel (driving end)
• Flywheel
• Ring gear for starter pinion
Benefits
• High performance
• Minimum weight
• Long maintenance intervals
• Long service life
• Low oil consumption
Function
The forces generated in the combustion chambers of the cylinders are transmitted from the pistons (3) and
conrods (4) to the crankshaft (2). The crankshaft transforms these forces into a rotary movement which is
transmitted via the flywheel (1). Torsional vibration is damped hydraulically by the vibration damper (5). A
press-fitted gear on the free end drives the gear train idler and drive gears. Lubrication of the crankshaft
bearings, support bearings, upper and lower conrod bearings and of the vibration damper is provided by the
lube oil system. The pistons are constantly cooled with oil from the spray nozzles installed in the crankcase.
48 | Series 4000 Engines | MS15065/01E 2019-01
TIM-ID: 0000072262 - 001
