Ryobi RY3714 Manual Del Operador página 22

the lower cut of the notch before the upper cut.
See Figure 21.
 Felling Backcut. The backcut is always made
level and horizontal, and at a minimum of 2 in.
above the horizontal cut of the notch. See Figures
21 - 22.
 Never cut through to the notch. Always leave a
band of wood between the notch and backcut
(approximately 2 in. or 1/10 the diameter of the
tree). This is called "hinge" or "hingewood." It
controls the fall of the tree and prevents slipping
or twisting or shoot-back of the tree off the
stump. See Figures 21 - 22.
 On large diameter trees, stop the back cut
before it is deep enough for the tree to either
fall or settle back on the stump. Then insert
soft wooden or plastic wedges into the cut so
they do not touch the chain. The wedges can
be driven in, little by little, to help jack the tree
over. See Figure 23.
NOTE: When bucking or felling with a wedge, it
may be necessary to remove the SAFE-T-TIP
anti-kickback nose guard to allow the bar to be
drawn through the cut. After the cut is complete,
the tip should be reinstalled immediately.
 As tree starts to fall, stop the chain saw and put
it down immediately. Retreat along the cleared
path, but watch the action in case something
falls your way. Be alert for overhead limbs or
branches that may fall and watch your footing.
WARNING:
Never cut through to the notch when making a
backcut. The hinge controls the fall of the tree,
this is the section of wood between the notch
and backcut.
REMOVING BUTTRESS ROOTS
See Figure 24.
A buttress root is a large root extending from the
trunk of the tree above the ground. Remove large
buttress roots prior to felling. Make the horizontal
cut into the buttress first, followed by the vertical
cut. Remove the resulting loose section from the
work area. Follow the correct tree felling procedure
as stated in Felling Trees after you have removed
the large buttress roots.
OPERATION
™
Page 22 — English
VERTICAL
CUT
LOOSE
SECTION
KICKBACK
HORIZONTAL
CUT
Fig. 24
Fig. 25