IVT GCHS-25, Manual

Page: 13 / 76

13
EN
Instruction manual
Checking the chain brake mechanism
The chain brake is a safety mechanism that intervenes
on machine shock, for example when kickback occurs.
The chain brake initiator (9) moves forward while resting
on the operator’s hand. The saw chain (6) stops in a
maximum of 0.3 seconds.
An operational test should be carried out from time to
time:
1. Check that the chain brake is deactivated, pushing
the chain brake initiator (9) towards the rear handle (1)
(position 1). [F10]
2. Position the machine on a solid flat surface, that
has been cleared from all objects.
3. Grasp the rear handle (1) with your right hand. With
your left hand, hold the front handle (2) [not chain brake
initiator (9)!] firmly.
4. Start engine.
5. Squeeze the throttle lever (18), then immediately
activate the chain brake initiator (9), slowly and
deliberately (position 2).
6. Saw chain (6) should stop abruptly.
7. When it does, immediately release the throttle lever
(18) and switch off the engine.
WARNING! If the saw chain (6) does not
stop when the chain brake mechanism
is activated, have the chainsaw
checked by an authorized service
centre. Do not use the chainsaw if
the chain brake mechanism does not
function properly!
STARTING / STOPPING THE ENGINE
Before starting the engine:
∙
Wear proper protective clothing
∙ Fill fuel and oil tanks respectively
∙ Check working area, objects to be cut and cutting
direction. If there is any obstacles, remove them.
∙ Inspect also the machine to ensure it is in proper
working order.
∙ Check the chain brake initiator (9): it must be intact
and in good working order.
∙ Check the saw chain (6): it must be correctly
tensioned and sharpened.
∙ Position yourself in order to have a secure footing
and a planned retreat path from the falling trees.
Starting the engine [F11]
1. Activate the fuel pump (29) until the carburettor has
been fully primed (when fuel appears in the pump).
2. Set the On/Off switch (12) to “I” position.
3. Pull out the choke lever (15) completely
4. Lay the machine down and, while holding the lower
portion of the rear handle (1) with your foot, pull the
handle of the recoil starter (14) smoothly, until you feel
resistance.
5. Pull the recoil starter (14) a few times, until the
engine starts.
6. As soon as the engine starts running, smoothly
return the choke lever (15) back to its initial position.
7. A few seconds after the engine has started, press
the lock-off button (11) that locks the throttle lever (18),
then press the throttle lever (18) to bring the engine to
full speed.
CAUTION! Before pulling throttle
lever (18), be sure the chain breake
mechanism is not on.
Stopping the engine
1. Release the throttle lever (18), so that the engine
goes back to a minimum and the saw chain (6) stops.
2. Set the On/Off switch (12) to “0” position.
OPERATING INSTRUCTIONS
General recommendations
∙
The machine should always be held firmly with
both hands, the left hand should hold the front handle
(2) and the right hand, the rear handle (1) [F12] . The
fingers should constantly encircle the grip. Under no
circumstances should the operator work with only one
hand.
∙ The machine should only be used under reliable
support conditions. The machine should be held
distanced from the body.
∙ The saw chain (6) needs to move at full speed
before coming into contact with the wood. When this
has been achieved, the machine should be fixed to the
wood using the notched rest (8). During cutting, this
support should be used as a lever.
∙ When cutting thick trunks or branches, the notched
rest (8) should be repositioned. To do this, the machine
should be inclined backwards in order to release the
notched rest (8) and allow it to move downwards. The
machine should not be removed from the cut when
doing this procedure.
∙
Do not apply intense pressure to the saw chain (6)
during cutting. Allow the saw chain (6) to work freely,
only lightly applying pressure, using the notched rest (8)
as a lever.
∙
Never use the machine with outstretched arms. Do
not attempt to cut in difficult areas or standing on a tree.
Under no circumstances should the work be carried out
above shoulder level.
∙ Be careful at the final stage of cutting. When the
machine has just completed the cut, the sawn-off