Oil Reservoir; High Pressure Pump; Injection Pressure Regulator - International VT 275 V6 Manual

FUEL MANAGEMENT SYSTEM
H H I I G G H H P P R R E E S S S S U U R R E E
P P U U M M P P R R E E S S E E R R V V O O I I R R
I I N N J J E E C C T T I I O O N N
I I N N J J E E C C T T I I O O N N
P P R R E E S S S S U U R R E E
P P R R E E S S S S U U R R E E
R R E E G G U U L L A A T T O O R R
R R E E G G U U L L A A T T O O R R
54
R R E E S S E E R R V V O O I I R R
S S C C R R E E E E N N
H H I I G G H H P P R R E E S S S S U U R R E E P P U U M M P P
H H I I G G H H P P R R E E S S S S U U R R E E P P U U M M P P
H H I I G G H H P P R R E E S S S S U U R R E E P P U U M M P P
H H I I G G H H P P R R E E S S S S U U R R E E P P U U M M P P
H H I I G G H H P P R R E E S S S S U U R R E E H H I I G G H H P P R R E E S S S S U U R R E E
P P U U M M P P C C O O V V E E R R
P P U U M M P P C C O O V V E E R R
International ® VT 275 V6 Engine

Oil Reservoir

• The reservoir for the high-pressure pump is
cast into the front of the crankcase Vee.
The reservoir receives oil under pressure
from the crankshaft driven lube oil pump.
The reservoir holds approximately one
quart (one liter) of oil.
• A raised cavity in the bottom of the
reservoir feeds oil from the reservoir to the
high-pressure pump.
• A 150-micron screen in the oil reservoir
filters any large debris that may be in the oil
before it reaches the pump.

High Pressure Pump

• The high-pressure pump produces the
injection control pressure. The pump is
mounted under the pump cover at the rear
of the crankcase and has four pistons
arranged in a Vee configuration. The pump
is gear driven off the camshaft gear. The
pump aligns with an O-ring sealed
passage that leads to the reservoir. Pump
output is directed to the branch tube
assembly through a quick disconnect
adapter. The pump, which protrudes
through the top of the pump cover, is
sealed at the cover opening with an O-ring.

Injection Pressure Regulator

• The Injection Pressure Regulator (IPR)
mounts on the high-pressure pump.
• The pump moves more oil than the system
requires, so excess oil is drained from the
system to control the pressure. The ECM
commands the IPR in order to increase or
decrease the amount of oil drained from
the system. The IPR coil swivels on the
IPR so the connection can be positioned
pointing down after the IPR is tightened.