Hitachi Koki CS 40EA Manual De Instrucciones página 14

English
WARNING
These methods are extremely dangerous
because they involve the use of the nose of
guide bar and can result in kickback.
Only properly trained professionals should
attempt these techniques.
Limbing
Limbing is removing the branches from a feller tree.
WARNING
A majority of kickback accidents occur during
Iimbing.
Do not use the nose of the guide bar. Be
extremely cautious and avoid contacting the
log, other limbs or objects with the nose of the
guide bar. Be extremely cautious of limbs under
tension. They can spring back towards you and
cause loss of control resulting in injury. (Fig. 28)
Stand on the left side of the trunk. Maintain a secure
footing and rest the saw on the trunk. Hold the saw
close to you so that you are in full control of it. Keep
well away from the chain. Move only when the trunk
is between you and the chain. Watch out for spring
back of limbs under tension.
Limbing thick branches
When limbing thick branches, the guide bar may get
pinched easily. Branches under tension often snap
up, so cut troublesome branches in small steps.
Apply the same principles as for cross cutting. Think
ahead and be aware of the possible consequences
of all your actions.
14
Fig. 27
Fig. 28
Cross cutting/bucking
Before starting to cut through the log, try to imagine
what is going to happen. Look out for stresses in
the log and cut through it in such a manner that the
guide bar will not get pinched.
Cross cutting logs, pressure on top
Take a fi rm stance. Begin with an upper cut. Do
not cut too deeply, about 1/3 of the log diameter is
enough. Finish with a bottom cut.
The saw cuts should meet. (Fig. 29)
28. Relieving cut
29. Cross cut
30. Pressure on top
31. Pressure side
32. Tension side
33. Relative depth of saw cuts
Thick log, larger than guide bar length
Begin by cutting on the opposite side of the log.
Pull the saw towards you, followed by previous
procedure. (Fig. 30)
If the log is lying on the ground make a boring cut to
avoid cutting into the ground. Finish with a bottom
cut. (Fig. 31)
30
28
31
32
29
33
Fig. 29
Fig. 30
Fig. 31