Extraordinary Maintenance - Stiga 7 Series Operator's Manual

hours. Then rinse with clean water and
treat with a suitable anticorrosive spray,
before reassembling on the machine.
7.7 CHAIN CATCHER
Before use, always check the condition
of the chain catcher (Fig.1.H) beforehand
and replace it if damaged.
7.8 NUTS AND BOLTS
• Before use, always check that all nuts and
bolts are securely tightened to be sure the
machine is in safe working condition.
• Before use, always check that the hand
grips are firmly fastened in place.

8. EXTRAORDINARY MAINTENANCE

8.1 MACHINE AND BAR
LUBRICATION HOLES
Before daily use, remove the clutch casing
(par. 4.2), remove the bar and check that
neither the machine lubrication (Fig. 36.A) nor
the guide bar (Fig. 36.B) holes are clogged.
8.2 CLEANING THE AIR FILTER
IMPORTANT Cleaning the air filter is
essential to guarantee the efficiency and
durability 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
8-10 working hours.
Clean the filter as follows:
1. Release the tab (Fig. 37.A) and
remove the cover (Fig. 37.B).
2. Press the metal air filter block until it
attaches with a click (Fig. 38.A).
3. Remove the air filter (Fig. 38.B),
tap it gently to remove the dirt and
clean using a soft brush.
4. If the filter is completely clogged, wash with
clean petrol. If you are using compressed
air, aim the jet so that it blows from the
inside towards the outside (Fig. 39.A).
5. Replace the filter (Fig. 40.B), pull
the metal block (Fig. 40.A) until it
clicks the filter into position.
6. Remount the casing (Fig. 41.A)
making sure that all the parts are
positioned correctly in their housings
on the cylinder cover (Fig. 41.B).
7. Insert the lower section of the
tab and press the top part until it
clicks into place (Fig. 41.C).
8.3 CLUTCH HOUSING
Have your dealer check the condition of the metal
band around the clutch housing once a month.
The band must be replaced if
deteriorated or deformed.
8.4 CHAIN DRIVE SPROCKET
Regularly check the condition of the
sprocket with your local dealer or Authorised
Service Centre and replace it when
wear exceeds the accepted limits.
Do not mount a new chain with
a worn sprocket or vice-versa.
8.5 CHECKING THE SPARK PLUG
The spark plug (Fig. 31.A) can be accessed
by removing the air filter cover (Fig. 37.B).
Periodically remove and clean the
spark plug using a metal brush to get
rid of any deposits (Fig. 42.A).
Check and reset the correct distance
between the electrodes (Fig. 42.B).
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.
8.6 STARTER CABLE
The starter rope must be replaced by
your Dealer or Authorised Service Centre
as soon as it shows signs of wear.
8.7 MAINTENANCE OF THE
TOOTHED CHAIN
To ensure that the chainsaw works
safely and efficiently, it is essential that
the cutting means are well-sharpened.
Chain sharpening is necessary when:
– the sawdust looks like dust.
– cutting becomes more difficult.
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