Poulan PLN1510 Manuel d'utilisateur télécharger pdf (Page 13)

5-3. LIMBING

Limbing a tree is the process of remov

ing the branches from a fallen tree. Do

not remove supporting limbs (A) until

after the log is buckecf (cut) into lengths

(Figure 5-3A).

Branches under tension should be cut

from the bottom up to avoid binding the

chain saw.

WARNING

Never cut tree limbs while standing on

tree trunk.

5-3A

5-4. 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 middfe,

make a downward cut halfway through

the log and then make the undercut,

This will prevent the iog from pinching

the bar and chain.8e 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 iength:

Cut from top (overbuck), being

careful to avoid cutting into the

ground (Figure 5-4A).

2. Log supported on 1 end: First, cut

from bottom (underbuck) 1/3 diamet

er of log to avoid splintering.

Second, cut from above (overbuck)

to meet first cut and avoid pinching

(Figure 5-4B).

3. Log supported on both ends: First,

overbuck 1/3 diameter of tog to

avoid splintering.Second, underbuck

to meet first cut and avoid pinching

(Figure 5-4C).

NOTE: The best way to hold a log whiie

bucking is to use a sawhorse. When

this is not possible, the log should be

raised and supported by the limb stum

ps or by using supporting logs. Be sure

the log being cut is securely suppored.

5-4C

5-5. BUCKING USING A

SAWHORSE

For persona! safety and ease of cutting,

the correct position for vertical bucking

is essential (Figure 5-5A),

VERTICAL CUTTING:

A. Hold the saw firmly 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.

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