PRODUCT INFORMATION
INDEX
DATE
Dep. 2
IC-C-D-25-005e C
February 2012
DESCRIPTION OF LUBRICATION SYSTEM
FOR “V” ENGINES
5/6
through the shaft orifices to the oiling holes of the intake and exhaust valve rockers and to the valve
stems. The rest of the cylinder head is spray-lubricated.
Finally, on diesel engines, oil will lubricate the injection pump drive.
Then, oil lubricates the timing gears.
Next, oil reaches a distributor that guides the oil stream to the turbocharger (except for the HGM engine) and
to the regulator.
Now, ahead of the oil distributing point to the crankshaft, oil reaches another distributor that directs oil partly to
lubricate the left injection pump (on diesel engines) and the water pump drive and partly to proceed to the
centrifugal filter, if any.
Afterwards, oil passes through a hole to the crankshaft, bearing caps, big and small ends of the connecting
rods.
On reaching the crankshaft, oil flows through internal channels which lead it to the bearing caps and big-
end bearings. Oil circulates through ducts inside the connecting rod to reach the upper part of the conrod,
i.e. the small end bushings and the pin, which are coated with a lubricating film.
The cylinder walls and the piston pins are lubricated by the amount of oil that leaks out from the ends of
the bearings and is splashed by the rotating action of the crankshaft. Excess oil is removed from the
cylinder by the scraper ring and fed back into the crankcase.
Thereafter, oil reaches the lubricating point of the camshaft on the left-hand side of the engine. It lubricates the
camshaft, rocker arms and cylinder heads on the left bank as well as the drive of the left injection pump.
At the end of the main lubrication gallery, side opposite inlet, oil arrives at the jet pressure valve that directs oil
to the left and to the right of the engine, through the jet gallery that leads it to the piston coolant jets.
Finally, oil returns to the oil sump
2.3.5
O&M_2.002211.810_A_10_2016
