Oregon PN2500N Mode D'emploi page 80

Operators should not use tree service chain-saw one-handed when the work
position is unstable or in preference to a handsaw when cutting small
diameter wood at the branch tips.
Tree service chain-saw should only be used one-handed (Fig.36) where
a) Operators cannot gain a work position enabling two-handed use,
b) They need to support their working position with one hand, and
c) The saw is being used at full stretch, at right angles to and out of line with
the operator's body.
Fig.36 – example of one-handed use of the chain-saw
Operators should never
- Cut with the kickback zone at the tip of the chain-saw guide bar (Fig.37),
- "hold and cut" sections, or
- Attempt to catch falling sections.
Fig.37 – example of kickback zone of the chain-saw guide bar
Spiked bumper: When cutting very thick branches, it is useful to penetrate
the wood with the spiked bumper, to cut with less effort and for a more
controlled cutting action.
Freeing a trapped saw
If the saw becomes trapped during cutting, operators should
a) Switch off the saw and attach it securely to the tree inboard (i.e. towards
the trunk side) of the cut or to a separate tool line,
b) Pull the saw from the kerf while lifting the branch as necessary, and
GB
Fig.36
80
Fig.37