Zenoah GZ381 Manuel D'utilisation page 34

difficult to sharpen correctly. See instructions under
To tension the saw chain on page 34
2. File all teeth on one side first. File the cutting teeth
from the inside face and reduce the pressure on the
return stroke.
3. Turn the chainsaw over and file the teeth on the
other side.
4. File all the teeth to the same length. When the length
of the cutting teeth is reduced to 4 mm (5/32") the
saw chain is worn out and should be replaced. (Fig.
114)
General advice on adjusting the depth
gauge setting
When you sharpen the cutting tooth (A) the depth gauge
setting (C) will decrease. To maintain optimal cutting
performance the depth gauge (B) has to be filed down to
achieve the recommended depth gauge setting. See
instructions under the heading
38 to find the correct depth gauge setting for your
particular chain.
(Fig. 115)
WARNING: The risk of kickback is
increased if the depth gauge setting is too
large!
To adjust the depth gauge setting
Sharpen the cutting teeth before adjusting the depth
gauge setting. See heading
on page 33 . We recommend that you adjust the depth
gauge setting every third time you sharpen the cutting
teeth.
Note: This recommendation assumes that the length of
the cutting teeth is not reduced excessively.
You will need a flat file and a depth gauge tool to adjust
the depth gauge setting. We recommend that you use
our depth gauge tool to acheive the correct depth gauge
setting and bevel for the depth gauge.
1. Place the depth gauge tool over the chain. Detailed
information regarding how to use the depth gauge
tool, will be found on the package of the depth gauge
tool.
2. File off the tip of the depth gauge that protrudes
through the depth gauge tool. Use the flat file. (Fig.
116)
The depth gauge setting is correct when you no longer
feel resistance as you draw the file along the depth
gauge tool.
To tension the saw chain
WARNING: A slack saw chain may jump off
and cause serious injury or death.
34
Technical data on page
To sharpen the cutting teeth
The more you use a saw chain the longer it becomes. It
is therefore important to adjust the saw chain regularly
to take up the slack.
Do a check of the saw chain tension every time you
refuel. Tension the chain as tightly as possible, but not
so tight that you cannot pull it round freely by hand.
(Fig. 117)
Note: A new saw chain has a running-in period during
which you should do a check of the tension more
frequently.
1. Undo the bar nut(s) that hold the clutch cover/chain
brake. Use the combination spanner. (Fig. 118)
2. Tighten the bar nuts by hand as tight as you can.
3. Raise the tip of the bar and stretch the saw chain by
tightening the chain tensioning screw. Use the
combination spanner. Tighten the saw chain until it
does not sag from the underside of the bar. (Fig.
119)
4. Tighten the bar nuts using the combination spanner
and lift the tip of the bar at the same time.
5. Make sure that you can pull the saw chain round
freely by hand and that it does not sag from the
underside of the bar. (Fig. 120)
The position of the chain tensioning screw on our
chainsaws varies from model to model. See instructions
Product overview GZ381 on page 18
under the heading
to find out where it is on your model.
Lubrication of the cutting equipment
To do a check of the saw chain lubrication
Do a check of the chain saw lubrication each time you
refuel.
1. Start the product and let it run at 3/4 throttle. Aim the
tip of the bar at a light coloured surface about 20 cm
(8 inches) away.
2. After 1 minute running you should see a distinct line
of oil on the light surface.
To examine the saw chain lubrication if it does not
work
Do the following if the saw chain lubrication does not
work:
• Do a check of the oil channel in the guide bar to
make sure that it is not blocked. Clean if necessary.
(Fig. 121)
• Do a check of the groove in the edge of the guide
bar to make sure that it is clean. Clean if necessary.
(Fig. 122)
• Make sure that the bar tip sprocket turns freely and
that the lubricating hole in the guide bar tip sprocket
is not blocked. Clean and lubricate if necessary. (Fig.
123)
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