Technical data

21
In the centrifugal oil filter housing there are reducing 7, drain valve 8 and safety valve
10.
Upon starting the diesel engine the non-heated oil comes directly to the diesel engine
pipeline through the reducing (radiator) valve bypassing the radiator due to high resistance of the
radiator.
The safety valve (centrifugal filter valve) serves for maintaining the oil pressure before
the filter rotor of 101.8 psig (7 kgf/cm
2
). When the pressure exceeds the above value, some non-
cleaned oil is drained through the valve into the engine crankcase.
Both reducing and safety valves are not adjustable.
It is strictly prohibited to turn out the plugs of the reducing and safety valve.
The drain valve is adjusted to the pressure if 29...43.5 psig (2.0...3.0 kgf/cm
2
) and used
for maintaining the necessary oil pressure in the main pipeline of the diesel engine. The surplus oil
is drained into the engine crankcase through the valve.
From the main gallery of the engine the oil is passed to all the main bearings of the
crankshaft and necks of the camshaft. From the main bearings it is passed to all the connecting
rod bearings. From the first main bearing oil is passed through the special channels to the bushes
of the intermediate gear and the fuel pump driving gear as well as to the fuel pump.
The parts of the valve gear link are lubricated with oil supplied from the rear bearing of
the camshaft through the channels in the cylinder block, hole in the fourth rocker arm into the in-
ner cavity of the rocker shaft and through the hole to the rocker arm bush and then to adjusting
screw and push rod.
1 – oil radiator; 2 – piston cooling fuel injectors; 3 – centrifugal oil filter; 4 – protective strainer; 5 –
oil-filler neck; 6 – plug of the oil sump; 7 – reducing valve; 8 – drain valve; 9 – pressure gauge; 10 – safety
valve; 11 – oil receiver; 12 – oil pump.
Symbols: filtered oil, hot
filtered oil, cold
non-filtered hot oil to be drained to the oil sump