Chapter 5 Lubrication System
1.
Lubrication
System
3,4JH3(BXC)E
1 . Lubrication System
The
lube oil
in
the oil pan Is pumped up through the intake
filter and intake piping
by the lube oil pump, through the
holes in the cylinder body and on to the discharge filter.
The lube oil which flows from the holes in !he cylinder
body through the bracket to the oil element
is
filtered and
sent
to the oil cooler.
lt
returns from the oil cooler to the
bracket, the pressure is regulated, and it is fed back to
main gallery in the cylinder body.
The
lube oil which flows
in
the main gallery goes to the
crankshaft journal, lubricates the crank pin
from
the
crankshaft journal, and a portion of the oil is fed to the
camshaft beadngs.
Oil ls sent from the gear case camshaft bearings through
Lubricating
oil
cooler
[4JH3E
only}
Lubricating
oft
filter
Oil
pressure
switch
the holes
in
the cylinder body and cy!irder head
to
the
valve arm shaft
to
lubricate the valve arm and valves.
Oil is also sent from the main gallery to the piston cooling
nozzle
to cool the piston surface, and
is
sent through !he
intermediate gear bearing (oil) holes
to lubricate the in-
termedia!e
gear
bearings
and
respective gears.
Lube oil
for the fuel injection
pump
is sent by pipe from
the main gallery to the fuel injection pump.
Part of the lube oil is sent from the oil cooler discharge to
the supercharger
in
engines fitted with one, and is then
piped backfrom the supercharger to the oil pan.
Fuel
injection
pump
Oil
pressure
regulating valve
Cylinder
block
main
gallery
Lubricating
oil
pump
Cam
shaft
bearing
Cooling
nozzle
Lubricating
oil
filter
Idle
gear
tace
Crank
pin
Piston
\
....
____________
-T_ap_p_e_t_an_d_c_am-fa-ce
______
O_il_p_a_n
_________
---J/
Printed in Japan
HINSllI-118009
5-1
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