Correct maintenance is essential to maintain the
original efficiency and safety of the machine over
time.
During maintenance ope-
rations:
– Remove the spark plug cap.
– Wait until the engine is sufficiently cold.
– Use protective gloves when handling the
blades.
– Keep the blade protection device on, ex-
cept when intervening directly on the blade.
– Never dispose of oils, fuel or other polluting
materials in unauthorised places.
CYLINDER AND SILENCER
To reduce fire risks, periodically clean the cylinder
flaps with compressed air and clear the silencer
area to get rid of sawdust, branches, leaves or
other debris.
STARTING SYSTEM
To avoid overheating and damage to the engine, al-
ways keep the cooling air vents clean and free of
sawdust and debris.
The starter rope must be replaced as soon as it
shows signs of wear.
NUTS AND SCREWS
Periodically check that all the nuts and screws are
securely tightened and the handgrips are tightly
fastened.
CLEANING THE AIR FILTER (Fig. 17)
Cleaning the air filter is es-
sential to guarantee the efficiency and duration of
the machine. Do not work with a damaged filter or
without a filter, as this could permanently damage
the engine.
It must be cleaned after every 15 working hours.
WARNING!
IMPORTANT
Clean the filter as follows:
– Press the button (1), turn the cover (2) over and
remove the filter element (3).
– Wash the filter element (3) with soap and water.
Do not use petrol or other solvents.
– Leave the filter to dry in the open air.
– Refit the filter element (3) and close the cover (2)
pushing until it clicks into place.
CHECKING THE SPARK PLUG (Fig. 18)
Periodically remove and clean the spark plug using
a metal brush to get rid of any deposits.
Check and reset the correct distance between the
electrodes.
Replace the spark plug and fasten it firmly using the
supplied wrench.
The spark plug must be replaced with one with the
same characteristics whenever the electrodes
have burnt or the insulation has worn, and in any
case every 100 working hours.
TUNING THE CARBURETTOR
The carburettor is tuned by the manufacturer to
achieve maximum performance in all situations,
with a minimum emission of toxic gas in compli-
ance with the regulations in force.
In the case of poor performance contact your
Dealer for a check of the carburetion and engine.
•
Tuning minimum speed
The cutting device must
not move when the engine is running idle. If
the cutting device moves when the engine is
running idle, contact your dealer to correctly
regulate the engine.
ANGLE TRANSMISSION (Fig. 19)
Lubricate with lithium-based grease.
Remove the screw (1) and put in the grease, turn-
ing the shaft manually until grease emerges, then
replace the screw (1).
WARNING!
12
MAINTENANCE AND STORAGE
EN
8. MAINTENANCE AND STORAGE
Summary of Contents for SB 28
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