LANDI RENZO S.p.A.
Installationand adjustament manual CN04
8/16
4.2 VEHICLE WITH CARBURETTOR OR FUEL
INJECTION ENGINE
The first operation is to adjust the maximum:
• bring the engine to about 3,500 rpm and turn the
throttle adjustment screw on the pipe connecting
the pressure regulator and the mixer, until the
values of CO, CO2 and HC are about as shown in
the table;
The second operation is to regulate the minimum:
• with the engine on, turn the throttle adjustment
screw (B) (clockwise to decrease and anticlockwise
to increase) until the CO, CO2 and HC values are
approximately those shown in the table;
After registering the minimum and the maximum,
perform a road test.
5. ‘ADJUSTMENT OF ‘EC04’ PRESSURE
REGULATORS
without exhaust gas analyser
5.1 VEHICLES WITH FUEL INJECTION
SYSTEMS AND CATALYTIC CONVERTERS
See paragraph 4.1, omitting the test with the
exhaust gas analyser.
5.2 VEHICLES WITH FUEL INJECTION
SYSTEMS AND CARBURETTORS
The first operation is to adjust the maximum:
• bring the engine to about 3,500 rpm and turn the
throttle adjustment screw on the pipe connecting
the pressure regulator and the mixer clockwise
until the engine noise changes because of the lean
mixture, then turn the screw very slowly in an
anticlockwise direction until the engine revs incre-
ase; in this phase the screw does not need to be
turned anticlockwise again since this would only
increase consumption without increasing yield.
The second operation is to regulate the minimum:
• with the engine on, turn the throttle adjustment
screw (B) (clockwise to decrease and anticlockwise
to increase) until a stable minimum is achieved,
and check again after the road test.
After registering the minimum and the maximum,
perform a road test.
6. SYSTEM MAINTENANCE OPERATIONS
To obtain the best from methane fuel, the engine
must be tuned and regularly maintained, in both its
mechanical and its electrical parts. In addition to
the normal maintenance prescribed by the vehicle
manufacturer, you should also:
• every 15,000 km, check/replace the air filter,
replace the spark plugs, check the exhaust gas,
check the efficiency of the electrical system (che-
ck that connections have not rusted);
every 30,000 km, check the play in the valves, the
efficiency of the Lambda probe (for vehicles with
catalytic converters) and use the bleed tap to
check that there is no oil or other residues inside
the pressure regulator.
• every 100,000 km, if malfunctioning has develo-
ped, perform a general overhaul of the conversion
system, using our product overhaul kits, which
come complete the suitable instructions that de-
scribe the procedures to follow. Spark plugs with
a colder thermal grade should be used, checking
that the electrode spacing is never greater than 1
mm. The valve clearances should be increased to
0.05 mm greater than the specifications for petrol
operations supplied by the vehicle manufacturer.
Once a methane conversion system has been
installed, it is natural to use this for as many
kilometres as possible: however, to avoid prejudi-
cing the correct operation of the original petrol
fuelled system, and of the fuel pump, it is advisable
to drive 2/3 km on petrol every 200/300 km at least
(at each refuelling with methane, for example).
Data, descriptions and illustrations are purely indi-
cative, and LANDI RENZO S.p.A. reserves the
right to make improvements or changes to them as
it sees fit, and without notice.
Do not tamper with the original Landi Renzo com-
ponents for any reason, particularly not with the
engine running or with the ignition on.
Washing the engine with direct jets of water, and
installations in unsuitable points of the engine
compartment can cause water infiltration into the
components and in consequence to subsequent
damage.
LANDI RENZO S.p.A. declines any responsibi-
lity for damages to persons or things deriving
from tampering with its device by unauthori-
sed personnel.
Maintenance
SETTING TABLE REGULATORS CN04
LIMITS
GAS SPEED
Bottom Top
CO
(in %)
Idling
3.500 g/m
0.10
0.10
0.30
0.30
CO
2
(in %)
Idling
3.500 g/m
11
11
13
13
HC
(in ppm)
Idling
3.500 g/m
150
30
250
60