20
100647 - ChAiNSAw
OPERATiON
1b. If the log is supported on two ends (Fig. 17), make the
first cut from above (overbucking). Refer to Overbucking.
2. Make the second cut from the opposite side until the two cuts
meet. If the diameter of the wood is large enough, insert soft
plastic or wooden wedges to hold the cut open and prevent
pinching (Fig.20). Take care not to touch the wedges with the
saw chain.
Cutting Fully-Supported Logs
When logs are supported along the entire length, extra care should
be taken to make sure the saw chain does not contact the ground
or other support structure (Fig. 18).
1. Cut through the log as much as possible, without cutting
into the ground or support structure. Cut from above
(overbucking). Refer to Overbucking.
2. Roll the log over and finish cutting through the log from above
(overbucking).
Overbucking
1. Begin cutting from above, with the bottom of the saw chain
against the top of the log (Fig. 18).
2. Exert light, downward pressure. The saw will tend to pull
away from the operator. Be prepared and hold the saw firmly
to maintain control.
Underbucking
1. Begin cutting from below, with the top of the saw chain
against the bottom of the log (Fig. 19).
2. Exert light, upward pressure. The saw will tend to push
toward the operator. Be prepared and hold the saw firmly to
maintain control.
Second cut
First cut (1/3 diameter)
Load
Log supported
on one end
Figure 16
Second cut
First cut (1/3 diameter)
Load
Log supported
on two ends
Figure 17
Overbucking
Figure 18
Underbucking
Figure 19
Wedge
Figure 20
Pruning
wARNiNG
When carrying a chainsaw with engine running, always engage
the chain brake.
wARNiNG
Do not cut above shoulder height. Use a pole saw to cut limbs
above shoulder height or hire a professional. Do not operate
the unit in a tree or on a ladder unless specifically trained to
do so.
wARNiNG
Falling branches can cause serious injury. Always wear
appropriate head protection. Plan an escape route away from
falling limbs. Do not position any body parts directly below the
limb when cutting.
