Working Techniques - McCulloch CS 330 Manual De Instrucciones

CHAIN BRAKE
WARNING:
Ensure chain brake is dis-
engaged by pulling the front hand guard back
toward the front handle as far as possible. The
chain brake must be disengaged before cutting
with the saw.
S This saw is equipped with a chain brake. The
brake is designed to stop the chain if kick-
back occurs.
S The inertia activated chain brake is activated
if the front hand guard is pushed forward, ei-
ther manually or by centrifugal force.
S If the brake is already activated, it is disen-
gaged by pulling the front hand guard back
toward the front handle as far as possible.
S When cutting with the saw, the chain brake
must be disengaged.
Disengaged
IMPORTANT POINTS
WARNING:
get stuck in the clutch cover causing the chain
to jam. Always stop the engine before cleaning.
S Check chain tension before first use and af-
ter 1 minute of operation. See CHAIN TEN-
SION in the ASSEMBLY section.
S Cut wood only. Do not cut metal, plastics,
masonry, non-wood building materials, etc.
S The bumper spike may be used as a pivot
when making a cut.
S Stop the saw if the chain strikes a foreign ob-
ject. Inspect the saw and repair parts as ne-
cessary.
S Keep the chain out of dirt and sand. Even a
small amount of dirt will quickly dull a chain
and increase the possibility of kickback.
S Practice cutting a few small logs using the fol-
lowing techniques to get the "feel" of using
your saw before you begin a major sawing
operation.
S Squeeze the throttle trigger and allow the
engine to reach full speed before cutting.
S Begin cutting with the saw frame against
the log.
S Keep the engine at full speed the entire
time you are cutting.
S Allow the chain to cut for you. Exert only
light downward pressure.
S Release the throttle trigger as soon as the
cut is completed, allowing the engine to
idle. If you run the saw at full throttle with-
out a cutting load, unnecessary wear can
occur.
S To avoid losing control when cut is com-
plete, do not put pressure on saw at end of cut.
S Stop the engine before setting the saw down.

WORKING TECHNIQUES

Engaged
Sometimes wood chips
TREE FELLING TECHNIQUES
WARNING:
chain saw skills and experience. Inexperi-
enced users should not fell trees. Do not at-
tempt any task that makes you feel uncomfort-
able or unsure.
WARNING:
or electrical wires if you do not know the direc-
tion of tree fall, at night since you will not be able
to see well, or during bad weather such as rain,
snow, or strong winds. as fall is unpredictable.
Carefully plan your sawing operation in ad-
vance. You need a clear area all around the tree
so you can have secure footing. Check for bro-
ken or dead branches which can fall on you
causing serious injury.
Natural conditions that can cause a tree to fall
in a particular direction include:
S The wind direction and speed.
S The lean of the tree. The lean of a tree might
not be apparent due to uneven or sloping ter-
rain. Use a plumb or level to determine the
direction of tree lean.
S Weight and branches on one side.
S Surrounding trees and obstacles.
Look for decay and rot. If the trunk is rotted, it
can snap and fall toward the operator. Make
sure there is enough room for the tree to fall.
Maintain a distance of
the nearest person or other objects. Engine
noise can drown out a warning call. Remove
dirt, stones, loose bark, nails, staples, and wire
from the tree where cuts are to be made.
Plan a clear retreat path
45_
FELLING LARGE TREES
(15 cm in diameter or larger)
The notch method is used to fell large trees. A
notch is cut on the side of the tree in the desired
direction of fall. After a felling cut is made on
the opposite side of tree, the tree will tend to fall
into the notch.
NOTCH CUT AND FELLING THE
TREE
S Make notch cut by cutting the top of the notch
first. Cut through
1/3
tree. Next complete the notch by cutting the
bottom of the notch. See illustration. Once
the notch is cut remove the notch of wood
from the tree.
Felling a tree requires
Do not cut near buildings
tree lengths from
2-1/2
Direction of Fall
of the diameter of the