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2 OPERATION N° MÅ.
142-0
\Jic.iiuy /L(r(/r
IUIt(
1/rH
Il.
M 20/616,
M 22/617,
M 23/623 ENGINES
(
iv/fr/es
iii/vd
iiili' airrond;Iwning
huf ujl/'ohil
el Iorquv eoizzirfii
IMPORTANT
!I is ahso/ulvlv
torh,drh'i, lo
r/'a;ige I/'v
Se//Ing
ol slo/'-srrvii
(
1
Jur
/l'v sivo 11d iliokr ha/ter/iv
u/'iil'
las
mi
n
adius/ed ln
//'e in at,,, tar/urer iii/Ii
el n,irrotni/ir.
1. Wait for the electric
cooling fans to cut
in
2.
Engine dl
ing speed
Ad
just sorew
(3) to
obtain the following result
idling speed of 850 to
900 rpm.
3.
SlowIy adjust
mixture
screw
(2) so as to obtain the
following result
1.5
to
2.5
'7
of
CO
Il'ise au/bor/stel
rvridii,js (ur res/if//el la eli,
8.7
or marc of
CO2
a,nhicn/ leui/nra/ure of
/ 5 lo 30°
(.
4.
Adjust screws
(3)
and
(2)
so
that hoth the
idlinq
speed
and the
quontities
of CO and
CO2
are correct.
Make
5UT
that
mixture
screw
(2)
is
ad ju sted
last.
5.
Fast idling
speed
Sa/Ich
on f/e
air rondilionwg
compressot, and adjust
screw (4) to
obtain the followinq
Fast idling
speed
of
1000
to
1050 rpm.
NOTE
ln case
this idling
speed is impossible
to obtain
the capsule
can be moved
(
by
unscrewinq
its
rwo
fixing
screws on the
carburettor
)
in order to reduce
the clearance
at the
fixing point
of the rod
opening the
first choke
butterfly.
III. M 22/617
ENGINES
( ich/des
ui il lorque ro,,,erier
M 23/623 ENGINES
( ichi vhs
iii/ii /orque
cunderfer
ii/ii'
ur fl i/bou
/ a,r-condil,onn)
R
NOTE On vehicies
fitted
with
air-conditioninq
the
compressor must
be
switched off durinq
adjustment.
1,
Wait for
the electric
cooling
fans
to cut
in.
2.
Engine
idling speed
with
the gear
lever in
the
«
Neutral
or
Parking position
ad
just
screw
(3) for the
opening of
the first
choke butterfly
to
obtain the folLowing
an idling speed
of
700 to 750
rpm.
3. Siowly
adjust the
rnixture serew
(2) sa as
to ohtain
1
.5
to
2.5
x
of
CO
1 h e se
au il, or/sed
re
adb,
g
.s ro rres/ioii
el If)
an
8.7
7
or more
of
CO
2
amhienl ieni/iera/llri.
0!
15 la 30
(
4.
Ad
just
screws
(3)
and (2) so
that both the
idling speed
and the
quantities
of
CO and
C02 are
correct
.
Make
sure
that
mixture
screw
(2) is adjusted
last.
5. Fast
idling speed
all1' th
l'andhrakv
ap/il/ed.
('tid
il gear
,,gaeed adjust
screw
(4) to obtain
the
following;
fast
idling speed of
725 to 775
rprn.
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