Table of Contents
Advertisement
Fig. 2-76.
Cold-start device
VO
LVO
103402
1.
Check
that there
is
oil in the damper cylinders.
See
under "Periodical
Check".
2. Connect a
tachometer and run the
e
ngine
warm
at
1500
r.p.m.
until
the
coo
lant
thermostat opens.
(One
way of finding
this
out
is
by feeling
th
e upper
rad
iator
hose
at
th
e
radiator
which
should
start to
get
warm
.)
3. Adju·st
the engine
speed
to 800
r.p.m.
with
the
throttle
stop screws
(2,
Fig.
2-49).
The speed should
be
adjusted
to 700 r.p.m
.
for a vehicle with auto-
maNc transmission. (If the eng·ine does not
reduce
its
idling
speed,
see under "By-pass
va
lve".)
N.B.
Screw
equaHy for
hoth
carburettors.
Check
thot
both carburettors have the
same air
valve
lift. This
is
easily checked by measuring with the
eye the distance between the
carburettor
house
bridge and rthe ai,r
valve.
The
di'
s
·
t ance
shou
ld
be
the
same for
both carburettors. More accurate
synchronization
is not required.
4.
Con
nect
a CO-meter and
check that the CO-con-
tent is within the
limits
2.5-3.5
%.
With the help
of the
idle
trimming screws (7,
Fig.
2-50) the
CO-
content can be adjusted within smaU deviations.
(If the CO-content
is
too high, check
~irst
the tem-
perature compensator, see under "Temperature
Compensator".)
5. Adjust
,the link
rods. With the controi against
its
stop on the
mani·
f ald bracket, the
link
rods
shou
ld
be
adjus·
t ed so that there is a c1earance of about
0.1 mm (0.004") between
th·
e lever and the flange
of the primary throttle sp.indle.
See
Fig. 2-73.
6. Adjust so
tha,
t the
valve
controi
·
o f
·
t he hot-start
valve
·is
against the ca·rburettor lever with the
valve pistonin the upper position and the throttle
contral at idlet. (See Figs. 2-64 and 2-65).
Lubricate the contact
surface
with
Mo'lykote
and
2:
34
11
10 9 8
Fig. 2-77.
Temperature compensator
l
.
Rubber seal
7. Screw for
cover
2. Rubber seal
8. Cross-slotted screw
3.
Valve
9. Adjust nut
4.
Bi-metal spring
10.
Housing
5. Cover
11
.
Marking
6.
Screw
for temperature
compensator
VO
LVO
103
731
check that the
eng
in
e
returns to idling spee,d
after
briefly
revving-up severa
l
times.
7.
Setting
the
fast idle: Pull out the
choke contro
i
23-25
mm (almost
1")
so
,
t hat th
e
mark
o
n
the
rapid
idle
cam
comes
opposite
th
e centerline
of
the
rapid
idle
sorew.
See
Fig.
2-74.
Then
adjust
the rapididle
sCl'ew
to
give an
e n-
gine speed
of
1100-
1300
r.
p.m.
FAULTY CARBURETTOR FUNCTION
1.
Check
to make
s
ure that the
reason for
th
e
fault
in
the
hmction is
not
due
to
wrong damper oil
or
oi'l
,leve
l,
impu.rities
in the f10akhamber or
a
faulty
float va,lve
and f
loa,
t . See
the
r
respective headings.
2.
Remove the
air
c1eaner and
che,ck
tha·
t
the
suction
valve('
s ) operate
easily
and without jamming. (The
damper piston(s) removed.) If this is not the
case,
remove the
suction chamber cover and
clean the
pistons. At the
same
time, che'ck to make
sure
the diaphragm is
in
good condition. Plug .Jseal
after fitting.
N.B
.
If
the mef.ering needle mU'st be released or
moved, it shoul,d be adjusted, see under the
head
-
ing
"Replacing the metering needle". A CO-meter
is
recommended for this purpose.
Temperature compensator
3.
Shou,ld
there be a powerful drop
in
the
idling
speed during idling for a
lengthy
period, especi-
ally
when
the weather
is
warm, check the function
of the temperature compensator by removing the
Advertisement
Table of Contents
