SDMO HX 3000 Manual De Uso página 18

7. Maintenance procedures
7.1. Cleaning the air filter
Never use petrol or solvents with a low flash point for cleaning the air filter element as this could result in a fire
or explosion.
Danger
Remove the wing nut (no. 1, fig. C) attaching the air filter cover (no. 2, fig. C), then remove the latter.
Remove the wing nut attaching the filter.
Remove the assembly consisting of foam (no. 3, fig. C) and paper (no. 4, fig. C) elements, and separate them. Check carefully
that the two elements are not torn or pierced. Replace them if they are damaged.
Foam element (no. 3, fig. C):
A)
Wash the element in a solution of household cleaning product and warm water, then rinse thoroughly, or wash it in non-
flammable solvent or solvent with a high flash point. Leave the element to dry fully.
B) Soak the element in clean engine oil and remove the excess oil. The engine will smoke when it is started for the first time if
too much oil remains in the foam.
Paper element (no. 4, fig. C):
Tap the element lightly several times on a hard surface to remove excess dirt, or send compressed air through the filter, from the
inside outward. Never try to remove dirt using a brush. Replace the element if it is too dirty.
Carry out refitting following the reverse procedure to that used for removal.
7.2. Cleaning the sediment bowl
Switch off the fuel tap (no. 14, fig. A).
Unscrew the plug (no. 1, Fig. D) to drain the fuel.
Fit the plug (no.1, Fig. D) back on.
Remove the bowl (no. 1, Fig. E) and the seal (no. 2, Fig. E).
Wash the bowl (no. 1, Fig. E) with non-flammable solvent or solvent having a high flash point. Leave to dry fully.
Refit the seal and the bowl.
Open the fuel tap (no.14, Fig. A) and check that there are no leaks.
7.3. Renewing the motor oil
Change the oil when the engine is still warm, to ensure that drainage is rapid and complete.
Remove the filling plug-gauge (no. 1, fig. B) and the drain plug (no. 3, fig. B) and drain the oil into a suitable container.
On completion, screw up again and tighten the drain plug (no. 3, fig. B).
Fill the engine oil sump with the recommended oil, then check the level.
Put in place and tighten the filling plug-gauge (no. 1, fig. B).
Check that there is no oil leak after filling.
Wipe off any trace of oil with a clean cloth.
7.4. Cleaning the spark arrester
Loosen the three mounting bolts (no. 1, fig. F) and (no. 2, fig. F) from the silencer (no. 3, fig. F), then remove the latter.
Loosen the four bolts (no. 4, fig. F) and (no. 5, fig. F) holding the silencer guard (no. 6, fig. F) and then remove silencer guard.
Remove the mounting bolt (no. 7, fig. F) from spark arrester (no. 8, fig. F) and place it down.
Using a wire brush, remove the carbon deposits from the spark arrester screen.
Note: The spark arrester must have no holes or cracks. Replace if necessary.
Refit the spark arrester (no. 8, fig. F), the guard (no. 6, fig. F) and the silencer (no. 3, fig. F) in the reverse order to removal.
7.5. Checking the spark plug
Remove the spark plug cap and use a spark plug spanner to remove the spark plug.
Visually inspect the spark plug and discard it if the electrodes are worn or if the insulation is split or chipped. If it is to be re-used,
clean the spark plug with a wire brush.
Measure the electrode gap with a feeler gauge. The electrode gap should be from 0.70 to 0.80 mm. Check that the spark plug
washer is in good condition and screw the spark plug in by hand, in order to avoid damaging the threads.
After fitting the spark plug, tighten it with a spark plug spanner to secure the washer.
Note: when fitting a new spark plug, tighten it by 1/2 turn after it is in place, in order to press the washers tightly. For the
installation of an old spark plug, tighten it by a 1/8–1/4 turn after it is in place, in order to press the washer tightly.