MTD GCS 4100/40, Instruction Manual, Page: 15 / 162

Operating Instructions – Chain Saw with Combustion Engine English
15
Risk of injury!
Never saw the tree trunk all the way
through.
The area (C, Fig. 16) is used as a
“hinge” and provides a defined
direction of fall.
When felling, stand only to the side
of the tree to be felled! There is a
risk of life-threatening injuries!
Tree trunks lying flat on the
ground

Cut halfway into the trunk, then
turn around and saw through
from the opposite side.
Damage to the chain saw
When sawing through the trunk,
ensure that the saw rail does not
touch the ground!
Supported tree trunks
We recommend supporting trunks,
which are to be sawn through, on
sawhorses. If this is not possible, the
trunk should be raised and
supported with the aid of the
supporting branches or by using
support blocks.
Fig. 17

In area A first cut approx. one
third of the trunk diameter from
top to bottom, then complete the
cut from bottom to top.

In area B first cut approx. one
third of the trunk diameter from
bottom to top, then cut through
from the top.
Risk of injury!
Do not saw trunks which are under
tension! Splintering wood or a jam
-
med saw rail can result in extre
-
mely serious injuries!
Removing branches

Always work on the side opposite
the branch in question.

Start at the bottom of the trunk
and work upwards.

Always guide the saw from top to
bottom through the wood.

When limbing trunks lying flat on
the ground, first always saw off
the branches pointing upwards.
Do not cut through supporting
branches until the trunk has been
sawn into lengths.
Risk of injury!
Branches which are supported or
under tension may wedge the saw
chain in the wood!
Maintenance and cleaning
Danger
To protect against injury before all
work on the device
– switch OFF the engine
– wait until all moving parts have
come to a complete standstill.
– remove the spark plug terminal,
– allow the engine to cool down
(approx. 30 minutes).
Wear protective gloves.
In the interest of your own
safety!
Perform only the maintenance work
described here yourself. All other
work, in particular engine main
-
tenance and repairs, must be per
-
formed by a trained specialist.
Improper work may damage the
device and also result in injuries.
Have the device inspected once a
year at a service centre.
Overview of cleaning and
maintenance
After every use

Clean the device.

Clean the air filter.
Regularly, depending on the
conditions of use

Retension the saw chain.

Clean the oil guide groove in the
saw rail.

Regrind the saw chain.

Check the saw chain oil level, top
up if required.
Cleaning
Caution
– Do not spray the device with water
– Clean the device after each use. A
unit which is not cleaned will result
in damaged materials and
impaired function.
Cleaning the device.

Keep the ventilation slits clean
and dust-free.

Clean the device with a damp
cloth and a soft brush.

Using a brush, remove any dirt
from between the cooling fins on
the engine.
Cleaning the oil guide groove in
the saw rail

Remove the saw rail.

Remove dirt from the oil guide
groove using a suitable tool. (Use
a plastic spatula, not a steel tool!)

Reattach the saw rail.
Servicing
Retensioning the saw chain
Fig. 6

Loosen the nuts (19) (hand-
tight).

Lift the saw rail tip slightly and
hold it.

Tighten the adjusting screw for
chain tension (18) until the chain
is positioned tightly against the
underside of the saw rail.

Tighten up the nuts (19).
Note
The chain is correctly tensioned
when it can be lifted by 5 mm in the
middle of the saw rail.
Regrinding the saw chain
Special tools are required to
sharpen the saw chain and
guarantee that the blades of the
chain are sharpened at the correct
angle and to the correct depth. This
work may only be carried out by a
service centre.
Note
A saw chain that has been ground
incorrectly can cause kickbacks of
the chain saw in operation and
hence lead to injuries.
Cleaning the air filter
Fig. 18

Open the air filter cover: Loosen
the locking knob (7) by turning it
anti-clockwise and remove the
cover (6).

Remove the air filter (24).

Remove any loose dust by gently
tapping the filter.

Thoroughly clean the filter by
washing it out in a non-
flammable cleaning liquid (warm
soap solution). Then leave it to
dry.

Reinsert the air filter and close
the cover (6).
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