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System Operation
• Oil is drawn from the oil pan through
the pick-up tube, upper oil pan,
lower crankcase and the front cover
passage that leads to the oil pump
gear set. The oil is moved under
pressure by the crank-driven gear
set to the outlet port of the pump
where pressurized oil is exposed to
the pressure regulator valve. If the
pressure is high, the excess oil is
returned to the inlet side of the
pump. Oil then enters the vertical
passage in the crankcase that takes
the oil to the oil cooler cover.
• Oil entering the oil cooler cover is
directed to the cooler and oil cooler
bypass valve. If the oil is cold and
thick, the bypass allows oil to enter
the filter without moving through the
cooler. After passing through the
cooler, oil enters the oil adapter
assembly and is directed to the
filter. The top of the filter standpipe
contains the oil filter bypass valve,
which allows oil to bypass the filter
if the filter is restricted. After
passing through the filter, oil returns
to the cooler cover assembly and is
directed to the high-pressure pump
reservoir and the crankcase passages.
• Cooled and filtered oil enters two
oil passages at the top of the
crankcase. The right passage leads
to the right bank oil galley where oil
is directed to the crankshaft main
bearings, camshaft, right bank
lifters, and the right bank piston
cooling jets. The left passage leads
to the left bank oil gallery where oil
is directed to the left bank lifters
and cooling jets. Spray from the
cooling jets removes heat from the
crown of the pistons.
• Lubrication of the connecting rod
bearings is through drilled
passages from the main bearing
journals to the rod journals.
• Each lifter directs oil up the hollow
push rod to the rocker arm, where
oil from the push rod splash-
lubricates the rocker arm and valve
stem. The rear gear train is
lubricated by splash oil thrown off
the rear main bearing and drain oil
from the injection pressure regulator.
Oil
Pump
Pump
regulator
75 psi
Oil
cooler
Oil
filter
Cooler
bypass
Filter
bypass
Dual
turbocharger
To oil pan
Oil reservoir for
high-pressure
pump 0.95 qts
To high-pressure
oil system
Cam
bushing
Main
bearing
Rod
bearing
Piston
Cooling tube
Lifter
Right side
Left side
Diagnostic
port
EOPS
EOT
Primary
balancer
bushing
LUBRICATION SYSTEM
61
International
®
VT 275 V6 Engine
Содержание VT 275 V6
Страница 1: ...VT 275 V6 ENGINE model year 2005...
Страница 4: ...4...
Страница 110: ...110 International VT 275 V6 Engine NOTES...
Страница 111: ...111 International VT 275 V6 Engine NOTES...
Страница 112: ...2005 INTERNATIONAL TRUCK AND ENGINE CORPORATION TMT 120502 PRINTED IN THE U S A...