CONSTRUCTION
AND
FUNCTION
Lubrication
sy
stem
ct
®
®
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CD
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l·Piston
., I @
"
Fl.
2·0 il fil ter
J -Cranks
hli
ft
4·
0il
strainer
S-Rocker
ann
6·R
oc:
ker
,h
e
ft
(!) l
.dJ"...
I
7-0
il
pressure
st,rm
$witch
a·O
il
pump
9·
F".
t
lI"IleC
tl
On
p
ump
'O~Water
pump
Lubrication oil circu it
Lube oil circu1ntion
A trochoid rotary pump draws oil
in
tht
oil pan
and
delivers
It
under pressure
lO
<i
fun·flow oil ftlter, from
which lhe cleaned oil
is
forwarded Into
lhe
oil gallery
. inside the
cranKCase.
From the gallery, the oil
is
distri·
buted
to
the
var
ious parls
of
the engine.
The
pump
is
driven
from
the
c-a.rnshaft.
The oil filt
er
is
of
a cartridge type-containing a replaceable
element through which
the
oiJ
is
fOTC~d,
The
element
bctome
.s
increasingly dirty
as
the solid particles accumu-
l
ate
on
and
in
its
texture, thereby increasing
the
difference
in
preSSUf~
between inlet side and
oudet
side.
The
.]emen
' is to be r
epl.ced
before the differenti
.]
press
ure
ri
se
s 10 a
level
a[
wruch
the v
al
ve located
in
the
bypa
ss
passage opens
10
allow
the
oil to bypass
Ihe
element and flow directly
into
the oil gallery .
T
he
bypass
valve
is:
an
emer~ency
means;
It
opens to
av
oid
any
cri!really
re
duced supply
(If
lube oil
10
the
running
pans
of
the engine.
Oil
pan
The oil pan
i,
• sheelmetal
vesse
l ohaped deeper in ils
f
ront
pan
to
provide an o
il
sump.
The oil s
ump
is
so
located because of its position in the
mathine
. The oil
le
..
1 gauge
i,
located at its right·hand side.
The gasket, through
wh
ich the oil pan
is
atta
ched to
t
h~
crankcase. is
of
rubberized cork.
22.
Oil strainer
The
sllaine.l
is
3
m~tal
screen fitted to the
suction
si~e
of
the oil
pump
.
11
serves
the
purpose
of
preventing
any
large-size solid particles
from
entering
the
pump
.
Oil
pump
The
pwnp
is
located inSide
Ihe
crankcase
.t
it, right·
hand rear portion.
lls.
main shaft
is
driven from the skew
gear formed
of
the
camshaft. Being a troc/!oidal
rotary
pump
.
it
has two rotors,
inn
er
and
O
Uler.
Inner
rotor is
mounted
on
the
s.
haft
and
drives
ou
ter
rotoi instde (he
pump
case
.
l·
D
nve-
9I!~
r
2·M,ln
sh"ft
3..(:~$eo
4·0u~.r
rotor
&·tnfll'lr
r01Dr
ffl -
III
_________.1
~
:Il
••
T
4
m 9
fi\
(5
Oil pump - Cross sll(::tion
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