Oregon Qualcast PC40 Operation And Maintenance Manual page 14

General cutting instructions
Cutting
WARNING: As the felling cut gets close to the hinge, the tree should begin to fall. When tree begins
to fall, remove saw from cut, stop engine, put chainsaw down, and leave area along retreat path
(Fig.11A).
LIMBING
Limbing a tree is the process of removing the branches from a fallen tree. Do not remove supporting
limbs (A) until after the log is bucked (cut) into lengths (Fig.12). Branches under tension should be cut
A
from the bottom up to avoid binding the chainsaw.
WARNING: Never cut tree limbs while standing on tree trunk.
BUCKING
Bucking is cutting a fallen log into lengths. Make sure you have a good footing and stand uphill of the
log when cutting on sloping ground. If possible, the log should be supported so that the end to be cut
off is not resting on the ground. If the log is supported at both ends and you must cut in the middle,
make a downward cut halfway through the log and then make the undercut. This will prevent the log
from pinching the bar and chain. Be careful that the chain does not cut into the ground when bucking
as this causes rapid dulling of the chain.
When bucking on a slope, always stand on the uphill side.
1. Log supported along entire length: Cut from top (overbuck), being careful to avoid cutting into
theground (Fig.13A).
2. Log supported on 1 end: First, cut from bottom (underbuck) 1/3 diameter of log to avoid splintering.
Second, cut from above (overbuck) to meet rst cut and avoid pinching (Fig.13B).
3. Log supported on both ends: First, overbuck 1/3 diameter of log to avoid splintering. Second,
underbuck to meet rst cut and avoid pinching (Fig.13C).
NOTE: The best way to hold a log while bucking is to use a sawhorse. When this is not possible, the
log should be raised and supported by the limb stumps or by using supporting logs. Be sure the log
being cut is securely supported.
BUCKING USING A SAWHORSE
For personal safety and ease of cutting, the correct position for vertical bucking is essential (Fig.14).
VERTICAL CUTTING:
A. Hold the saw rmly with both hands and keep the saw to the right of your body while cutting.
B. Keep the left arm as straight as possible.
C. Keep weight on both feet.
CAUTION: While the saw is cutting, be sure the chain and bar are being properly lubricated.
A
Fig. 12
Fig. 13B
14
Fig. 13A
Fig. 13C
Customer Helpline 0844 801 3652
B
A
600mm
C
Fig. 14