GB
- 28 -
cessary, use a long screwdriver to move the
fi
lter to its correct position, taking care not to
damage in the process.
7. Fill tank with fresh fuel / oil mixture. See Sec-
tion Fuel and Lubrication. Install fuel cap.
7.2.4 Spark plug (Fig. 18A-18C)
Note:
To ensure that the saw’s engine retains its
power, the spark plug must be clean and have the
correct electrode gap (0.6 mm). The spark plug
must be cleaned or replaced after every 20 hours
of service.
1. Set the On/O
ff
switch to Stop (0)”.
2. Remove the top cover (A) by undoing the co-
ver fastening screw (B) on the cover. You can
then remove the cover (Fig. 18A).
3. Remove the air
fi
lter (Fig. 18B/Item C)
4. Disconnect the ignition cable (D) from the
spark plug by pulling and twisting it simulta-
neously (Fig. 18B).
5. Remove the spark plug using a spark plug
wrench. DO NOT USE ANY OTHER TOOLS.
6. Clean the spark plug with a copper wire brush
or
fi
t a new one.
7.2.5 Carburetor setting
The carburetor has been set to its perfect adjust-
ment at the factory. If it requires adjusting, take
the saw to your nearest authorized after-sales
service outlet.
Setting the idling speed:
Note:
Set the idling speed when the machine is
warm. If the engine stalls when the throttle is not
pressed and you have ruled out all the other cau-
ses listed in section 9 Troubleshooting, the idling
speed must be adjusted. To do this turn the idling
speed screw (Fig. 19/Item B) clockwise until the
machine runs smoothly at idling speed.
If the idling speed is so fast that the cutting tool
turns as well, it has to be reduced by turning the
idling speed screw counter-clockwise (Fig. 19/
Item B) for as long as is required for the cutting
tool to stop turning as well.
7.2.6 Chain bar maintenance
Regular lubrication of the chain bar (guide rail for
the chain and teeth) is essential. The chain bar
needs the maintenance described in the following
section in order for the saw to work at an optimum
level of performance.
Note:
The sprocket tip on your new saw has been
pre-lubricated at the factory. Failure to lubricate
the guide bar sprocket tip as explained below will
result in poor performance and seizure, voiding
the manufacturer’s warranty.
Tools for lubrication
The Lube Gun (optional) is recommended for
applying grease to the guide bar sprocket tip.
The Lube Gun is equipped with a needle nose tip
which is necessary for the e
ffi
cient application of
grease to the sprocket tip.
To lubricate sprocket tip
Lubrication of the sprocket tip is recommended
after 10 hours of use or once a week, which ever
occurs
fi
rst. Always thoroughly clean guide bar
sprocket tip before lubrication.
Note:
The saw chain does not have to be remo-
ved in order to lubricate the teeth of the chain
bar. Lubrication is possible during work, with the
engine switched o
ff
.
Caution:
Wear heavy duty work gloves when
handling the bar and chain.
1. Set the On/O
ff
switch to Stop (0)”.
2. Clean the guide bar sprocket tip.
3. Using the Lube Gun (optional), insert needle
nose into the lubrication hole and inject grea-
se until it appears at outside edge of sprocket
tip (Fig .20).
4. Rotate saw chain by hand. Repeat lubrication
procedure until the entire sprocket tip has
been greased.
Most guide bar problems can be prevented me-
rely by keeping the chain saw well maintained.
Insu
ffi
cient guide bar lubrication and operating
the saw with chain that is TOO TIGHT will contri-
bute to rapid bar wear.
To help minimize bar wear, the following guide bar
maintenance procedures are recommended.
Caution:
Always wear protective gloves during
maintenance operations. Do not carry out mainte-
nance when the engine is hot.
Turning the chain bar
The bar should be reversed every 8 working
hours to ensure uniform wear.
Keep the bar groove and lubrication hole clean
using the bar groove cleaner supplied optional.
(Fig. 21A)
Check the bar rails frequently for wear and, if ne-
cessary, remove the burs and square-up the rails
using the
fl
at
fi
le. (Fig. 21B)
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