Maruyama MCV31R Manual Del Propietario U Operador página 34

FELLING A TREE
• There are a number of factors that may affect the intended direction of fall and be alert for a
change in direction while the tree is falling.
• If the saw begins to pinch during the backcut operation, insert a wedge to open the cut and
remove it.
• Before felling a tree, consider carefully all conditions, including lean of tree, sloping ground, wind, wood
structure which may affect the direction of fall.
• Before cutting, clear the area around the tree. You will need good footing while working and select a path
of retreat.
1. Cut a notch on the side to which the tree is to fall.
• Cut to a depth of 1/3 of the trunk diameter.
• Remove resulting 45-degree piece.
2. Cut horizontally on the side opposite the notch and at
level about 5cm above the bottom of the notch.
(Backcut)
• The remaining wood between the notch and
backcut
• Will act as a hinge when the tree falls, guiding it in
the desired direction.
3. When the tree starts to fall, kill the engine, place the
saw on the ground and make your retreat quickly
FELL BIG TREE
• To fell big trees with a diameter exceeding twice the bar length, start the notching cuts from one side and
draw the saw through to the other side of the notch.
• Start the back cut on one side of the tree with the spiked bumper engaged, pivoting the saw through to
from the desired hinge on that side.
• Then remove the saw for the second cut.
• Insert the saw in the first cut very carefully so as not to cause kickback.
• The final cut is made by drawing the saw forward in the cut to reach the hinge.
DANGER
k
CAUTION
k
Felling direction
A: Wedges
— US-33 —
1/10
Notch
Back cut
45°
2.5 - 5cm
1/3