Tensioning The Chain - RedMax GZ380 Manuel D'instructions

GENERAL SAFETY PRECAUTIONS

Tensioning the chain

WARNING:
A slack chain may
jump off the bar and cause serious
or even fatal injury.
WARNING:
Always wear
approved protective gloves. Even
a non- - moving chain can cause
serious cuts to yourself or persons
you bump into with an exposed
chain.
The more you use a chain the longer it be-
comes. It is therefore important to adjust
the chain regularly to take up the slack.
Check the chain tension every time you
refuel. NOTE! A new chain has a running- -
in period during which you should check
the tension more frequently.
Tension the chain as tightly as possible,
but not so tight that you cannot pull it round
freely by hand. (9)
S Undo the bar nuts that hold the clutch cover/
chain brake. Use the combination spanner.
Then tighten the bar nuts by hand as tight as
you can. (10)
S Raise the tip of the bar and stretch the chain
by tightening the chain tensioning screw us-
ing the combination spanner. Tighten the
chain until it does not sag from the underside
of the bar. (11)
S Use the combination spanner to tighten the
bar nuts while lifting the tip of the bar at the
same time. Check that you can pull the chain
round freely by hand and that it does not sag
from the underside of the bar. (12)
Lubricating cutting equipment
WARNING:
Poor lubrication of
cutting equipment may cause the
chain to snap, which could lead to
serious, even fatal injuries.
Chain oil
Chain oil must demonstrate good adhesion
to the chain and also maintain its flow
characteristics regardless of whether it is
warm summer or cold winter weather.
As a chain saw manufacturer we have de-
veloped an optimal chain oil which has a
vegetable oil base. We recommend the
use of our own oil for both maximum chain
life and to minimize environmental dam-
age. If our own chain oil is not available,
standard chain oil is recommended.
Never use waste oil! Using waste oil can
be dangerous to you and damage the ma-
chine and environment.
IMPORTANT! When using vegetable based
saw chain oil, dismantle and clean the groove
in the bar and saw chain before long- -term
storage. Otherwise there is a risk of the saw
chain oil oxidizing, which will result in the saw
chain becoming stiff and the bar tip sprocket
jamming.
115391326 Rev. 3 1/31/11
Filling with chain oil
S All our chain saws have an automatic chain
lubrication system. On some models the oil
flow is also adjustable.
S The saw chain oil tank and the fuel tank are
designed so that the fuel runs out before
the saw chain oil. However, this safety fea-
ture requires that you use the right sort of
chain oil (if the oil is too thin it will run out be-
fore the fuel), and that you adjust the carbu-
retor as recommended (a lean mixture may
mean that the fuel lasts longer than the oil)
and that you also use the recommended
cutting equipment (a bar that is too long will
use more chain oil).
Checking chain lubrication
S Check the chain lubrication each time you re-
fuel. See instructions under the heading Lu-
bricating the bar tip sprocket.
Aim the tip of the bar at a light colored surface
about 8 inches (20 cm) away. After 1 minute
running at 3/4 throttle you should see a dis-
tinct line of oil on the light surface.
If the chain lubrication is not working:
S Check that the oil channel in the bar is not ob-
structed. Clean if necessary.
S Check that the groove in the edge of the bar
is clean. Clean if necessary.
S Check that the bar tip sprocket turns freely
and that the lubricating hole in the tip sprocket
is not blocked. Clean and lubricate if neces-
sary.
If the chain lubrication system is still not
working after carrying out the above
checks and associated measures you
should contact your servicing dealer.
Chain drive sprocket
The clutch drum is fitted with a Spur
sprocket (the chain sprocket is welded on
the drum).
Regularly check the degree of wear on the
drive sprocket. Replace if wear is exces-
sive. Replace the drive sprocket whenever
you replace the chain.
Checking wear on cutting equipment
Check the chain daily for:
S Visible cracks in rivets and links.
S Whether the chain is stiff.
S Whether rivets and links are badly worn.
Replace the saw chain if it exhibits any of
the points above.
We recommend you compare the existing
chain with a new chain to decide how badly
the existing chain is worn.
When the length of the cutting teeth has
worn down to only 0.16 inch (4 mm) the
chain must be replaced.
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