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Valve
c
alibrati
on is
checked
by
the
aid of a
com-
pressed
air
gauge,
to ensure
pressure
is
at
th$
spe-
cified
amo unt.
This
control
can be
carried
out
on
an
engme
assem-
b
led
on
t
he
machine
as
follows:
•
undo
the
warning
light ca
rrier
(F)
In
fi
g.
80
from
the
crankcase
housing and
screw the
gaugB
cable
mto
It.
Start
the
eng
me,
run
it
up
to
its
normal
o
perating
te
mperature.
and
observing the gauge
dial
e nsu re
it
IS
wilh
m
the
prescribed limlls (4.2
-!-
4.8
kg
/
c
m
2
-
5
.97
.;.
6
.82
Ibs/sq.in).
II
lower
,
fit up
one
or
more
adjusting
discs
.C,.
over
the spring.
If
higher,
remove
one
or more
discs
liII
the
c
orrect
p
ressure
is
aUained;
•
ensure
spring
«D»
(fig.
81)
w
hen compressed
10
19.5
mm
(.767") gives
a
load
of 4.675 .;.
4.825
kg
(10.3
---;-
10.6
Ibs).
Free
length of
spr
ings
is 28.650 -:- 29.350
mm
(1.127
--7-
1.154
f f
)
0
7 mm
(.275"
)
effect ive
spring
coi ls 15;
•
be su re
the threaded
porti on
01
the
pump
body
and plug is in goad
state
.
If not,
repl
ace as
ne-
cessary;
•
check smoothness of th
e plunger.
If scored
or
nicked, repla
ce
it.
c
Re-assembly
The valve components
are re-assembl ed
in
a
rever-
sed sequence.
Finally,
re-fit
compl
ete
reli
ef
v(l ive
.. C ..
into its threaded housing in
the
crankcase
(See
ar-
row "D» in fig.
80).
6.4
OIL
PRESSURE
LI
GHT
SWITCH
(See
" F".
fig
.
SO)
This
switch
is
fi
tted
in
the
Cf(lnkcase
and
IS cable
connected
10
a red
warning
ligh
t
on the
panel
board.
If
the operating
pressure
i
s too
low,
the
lamp
does
not go
o
ut
and warns
something IS
wrong
w
ith
Ihe
engine. In
such
an event
the
eng ine should be
im-
mediatety slopped
and
the
cause
fo
r
Ihe
pressure
d
rop
looked
lor
When
the
p
ressure
is c
orrect
.
the
light
goes
out
as
soon
as
the
engine
has
reached a
certain
number
01
revolutions.
6.5
-
a
REMOVING THE
OIL
CARTRIDGE
FROM THE
SUMP
(Iig.
76)
•
Drain the sump
o
il
afte
r
undoing drain plugs
,,0
..
wi th
gaske ts and
fille
r
ca
p
"P,.
:
•
undo
screw
.. Q".
remOve
plug
" R",
gasket
"S"
,
sp
rin
g
"
T~,
and filte
ring
ca
rtridg
e
~
U
'"
b
In
spection
of cartridge
The ca
rtridg
e s
hould
be
changed after
the first 500-
1000
km (300-600
miles) i.e.
after
the lirst oil change
and
alter every 6000
km (3600 miles)
i.e.
every 2
oil
c hanges.
Ensure the gasket
"8,,
on
plug «R» (fig.
76) is not
cru
mpl
ed
or
has
lost
its
elasticity.
If
so,
replace it.
c
Ae-fltling
Reverse
th
e d
ismantling
sequence.
The cartridge
co-
ve
r
secu
rin
g sc rew
on
the
sump
has to be
tightened
down wilh
a
torq ue
wrench
set
at
2.5 kgm (18
ft/lbs).
At the end
of
thi
s
operation,
re-fit drain plugs and
gaskets
,,0 ..
(fig
.
76) and
fill up the sump with fresh
oi
l (Quant ity
: 2.250 Its
-
4 pints Imp., 4,7 pints USA) -
Brand:
Agip
Si
nt
2000 SAE
10w/so.
After
lel1lng
Ihe
engine
idle
for a few minutes
,
check
again
il
the o
il
level is
up to the top mark
on
the dip-
s tick.
If
so
,
re-lit filler
cap
and
gasket «P" (fig.
76).
6.6
REMOVING THE
WIRE GAUGE
FILTER
FR
OM
THE OIL SUMP
(See
rig.
76)
Repeat
the same operations
as
described in section
6.
1.
49
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