Workshop Manual

N3
009W2329-R01
Lubricating oil system
The engine is lubricated through a pressure l ubrication system. The lubricating pump driven
by the camshaft sucks oil from the oil sump th rough a strainer. From the lubricating pump
the oil is pressed through a fine filter to the respective lubr icating points through oil ducts
bored in the goods. A reduction valve in the lubric ating system secures that the oil pres sure
is kept between 2.0 and 4.0 Bar at hot engine and max. revolutions.
Pressure relief valve
The pressure relief valve is fitted on the front of the engine in bore in the engine block in vertical
position in the same side as the lubricating oil filter. The valve is built up as shown on the drawing
below, and the purpose of this valve is to reduce the lubricating oil pressure to 2-4 Bar before this
goes out into the system.
Min. lubricating oil pressure at idling and with warm engine is 1.0 Bar.
The lubricating oil pressure can be adjusted by means of intermediate washers as shown on the
drawing.
Removal of washers gives lower lubricating oil pressure.
Dirt in the pressure relief valve may result in a low lubricating oil pressure and thus the piston
000E5035 should be taken out and cleaned if necessary.