DCE80-100E
Technical Handbook
Engine TAD720VE
Description
26
P.Group 30
TDCE01
04GB
Lubricating system
The engine is pressure-lubricated, and the oil is supplied by a
pump in the oil sump. All lubricating oil flows through a full-flow
filter. One part of the oil flows through a by-pass filter for separa-
tion of extremely small particles.
The lubricating oil is cooled in a plate oil cooler by the engine
coolant.
The lubricating system includes the following main components:
Oil pump - of rotor type, draws oil through a strainer which sep-
arates coarse particles. The oil is fed from the pressure side of
the pump through the oil filter and is then distributed to the differ-
ent ducts of the lubricating system
Piston cooling – reduces substantially the piston temperature
which, in turn, contributes to a longer life of the piston rings, re-
duces the risk of carbon deposits and lowers the oil consumption.
The pistons are cooled by oil which is sprayed by nozzles into the
underside of each piston and into the cooling passages when the
piston is at the bottom dead centre.
1. Oil pressure switch
2. Lifter with pulse lubrication
3. Push rod, oil duct for lubrication of
rocker arm assembly
4. Rocker arm
5. Return oil duct to oil sump
6. Piston cooling, 2-hole nozzle for
each cylinder
7. Oil filter, full flow with by-pass val-
ve which opens at 250
±50 kPa
8. Ruduction valvee, opening pres-
sure 400±40 kPa
9. Safety valve oil cooler, opening
pressure 1
± 0,1 MPa
10. Oil pump of rotor type, driven from
the crankshaft
11. Oil cooler
Lubricating system
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