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ENGINE
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2.1.6.2 COMPONENTS
A. OIL PUMP
The oil pump is a simple centrifugal pump driven by
crankshaft. The pump is fitted with a relief valve.
The main function of the oil pump is to circulate oil
through the engine components. It sucks the oil from
the oil sump through a strainer which prevents en-
trance of any particles into the pump.
OIL PUMP SPECIFICATIONS:
Number of Lobes in Inner Ro-
tor
10
Number of Lobes in Outer Ro-
tor
11
Axial Play Driver Gear
0.04/0.08
Discharge at 800 rpm
11.6 LPM
Discharge at 2000 rpm
29.0 LPM
Shut of Pressure at 800 rpm
5.8 to 6.8 bar
Shut of Pressure at 2000 rpm
9.0 to 10.8 bar
Oil Pressure and temperature
At Idling
Pressure = 1.4 bar
Temperature = 100± 5
0
C
At Engine max
speed( 4000 rpm)
Pressure = 4.5 bar
Temperature = 125± 5
0
C
NOTE
For other details refer overhauling procedure for oil
pump in engine section.
B. OIL FILTER:
The oil filter used in ARIA is a
“SPIN ON TYPE”
oil
filter. In Lubrication system flow the oil filter is locat-
ed after the oil cooler and before the oil is sent to
circulate in the engine.
The main function of oil filter is to filter all contami-
nants that get ingested into the engine, along with
traces of worn out metals from bearings and other
internal parts.
The oil enters the oil filter under pressure through the
holes on the perimeter of the base plate.
The oil then passes through the filter element where
it is "cleaned". It then flows to the central tube and
back into the engine.
NOTE
For removal & fitment procedure of oil filter refer reg-
ular maintenance engine section.