Grillo 4 BIS, Use And Maintenance

Page: 11 / 52

11
STARTING THE PETROL ENGINE
Connect the engine stop (fig. 1 no. 25 and fig. 3 no. 25). Turn on the petrol cock, push the throttle lever half way
and, if the engine is cold, engage the choke on the carburettor. Start the engine by pulling hard on the pull starter
handle (fig. 1 no. 6 and fig. 3 no. 6).
STARTING THE DIESEL ENGINE
Connect the engine stop (fig. 1 no. 25 and fig. 3 no. 25). Push the throttle lever to the midway position (see
engine manual), press the decompressor lever on the engine head until it remains in position and start the
engine by pulling hard on the pull starter handle (fig. 1 no. 6 and fig. 3 no. 6).
STARTING THE MACHINE
Engage the clutch and set the gearbox lever in the desired position. If the gear does not engage immediately,
give a few light touches on the clutch. Release the clutch lever slowly until the machine starts moving.
N.B. - If the PTO is connected the reverse gear cannot be inserted. Disengage the PTO and then engage
the reverse gear.
STARTING WORK
Engage the clutch and connect the PTO, moving the clutch lever slightly if it does not engage at once. Increase
speed as appropriate and release the clutch to start work.
END OF WORK
When work is ended, in order to stop the engine, set the gear and PTO in neutral position and leave the handles (fig.
1 no 18 - fig. 3 no 18). If your walking tractor is fitted with an electric starter you must also turn the ignition key off.
TROUBLESHOOTING
The following is a list of small problems which may occur during the use of the walking tractor, which the operator
himself can remedy:
1) If the petrol engine does not start, check as follows:
- that the fuel tank is at least half full;
- that the petrol cock is turned on;
- that the choke is engaged (when the engine is cold);
- that fuel is reaching the carburettor;
- that the vent hole on the fuel tank is not blocked;
- that the mesh filter at the carburettor intake is clean;
- that the carburettor jets are clean. Check by unscrewing them and if dirty, clean them with a jet of air;
- that spark plug is generating a spark. To check this, remove the spark plug, re-connect it to the electricity
supply wire, rest the metal side on an electrical earth and turn the engine-pulley as if to start it. If no spark is
seen between the electrodes, check the connection of the spark plug cable; if there is still no current replace
the spark plug with a new one. If a spark is still not obtained, the problem is in the electric system: capacitor,
coil, or in some other component. Contact your nearest service centre.
2) If the Diesel engine does not start check as follows:
- that the fuel tank vent hole is not blocked;
- that the fuel tank is at least half full.
If the engine still does not start, contact your nearest service centre.
3)
If the gears do not engage:
- regulate the clutch by unscrewing the adjuster screw until the clutch release distance is satisfactory.
- Remember that there must always be a little slack on the clutch cable.
4) Walking tractor with cutter bar or motor mower. If the blade coupling (fig. 30 no. 3) breaks frequently:
- check that the ledger plates are not too tight.
5) Check if the ground is stony; if so pull down the cutting height regulator slides to raise the cutter bar, so that
small stones cannot become jammed between the fingers and blades.
MAINTENANCE AND LUBRICATION
Proper maintenance and lubrication help to keep the machine constantly in perfect working order.
RUNNING-IN
Change the engine oil after the first twenty working hours.