Ryobi P548 Manuel D'utilisation page 24

PRUNING
See Figure 22.
Pruning is trimming limbs from a live tree.
 Work slowly, keeping both hands on the chain
saw with a firm grip. Always make sure your
footing is secure and your weight is distributed
evenly on both feet.
 Do not cut from a ladder, this is extremely
dangerous. Leave this operation for professionals.
 Do not cut above chest height as a saw held
higher is difficult to control against kickback.
 When pruning trees it is important not to make
the finishing cut next to the main limb or trunk
until you have cut off the limb further out to
reduce the weight. This prevents stripping the
bark from the main member.
 Underbuck the branch 1/3 through for your first
cut.
 Your second cut should overbuck to drop the
branch off.
 Now make your finishing cut smoothly and
neatly against the main member so the bark will
grow back to seal the wound.
WARNING:
If the limbs to be pruned are above chest height,
hire a professional to perform the pruning.
Failure to do so could result in death or serious
personal injury.
SPRINGPOLES
See Figure 23.
A springpole is any log, branch, rooted stump, or
sapling which is bent under tension by other wood
so that it springs back if the wood holding it is cut
or removed. On a fallen tree, a rooted stump has
a high potential of springing back to the upright
position during the bucking cut to separate the log
from the stump. Watch out for springpoles, they
are dangerous.
OPERATION
FIRST CUT
1/3 DIAMETER
FINISHING CUT
WARNING:
Springpoles are dangerous and could strike the
operator, causing the operator to lose control
of the chain saw. This could result in severe or
fatal injury to the operator.
24 - English
SECOND CUT
LOAD
SPRINGPOLE
Fig. 22
Fig. 23