Efco 147 Instruction Manual download pdf (Page 27)

OPERATION

Logs Under Stress (Fig. 64-65)

Make the first bucking cut (F) 1/3 of the way through the log

and finish with a 2/3 cut (G) on the opposite side. As the log is

being cut, it will tend to bend. The saw can become pinched or

hung in the log if you make the first cut deeper than 1/3 of the

diameter of the log.

Give special attention to logs under stress to prevent the bar and

chain from pinching.

Types of Cutting Used

Overbucking (Fig. 66)

Begin on the top side of the log with the bottom of the saw against

the log; exert light pressure downward.

Underbucking (Fig. 67)

Begin on the under side of the log with the top of the saw against

the log; exert light pressure upward. During underbucking, the

saw will tend to push back at you. Be prepared for this reaction

and hold the saw firmly to maintain control.

WARNING: Never turn saw upside down to undercut.

The saw cannot be controlled in this position. Always

make your first cut on the compression side of the

log. The compression side of the log is where the

pressure of the log’s weight is concentrated.

Limbing and Pruning

WARNING: Be alert for and guard against kickback.

Do not allow the moving chain to contact any other

branches or objects at the nose of the guide bar

when limbing or pruning. Allowing such contact can

result in serious injury.

• Work slowly, keeping both hands on the saw with a firm and

proper grip. Maintain secure footing and balance (Fig. 68).

• Keep the tree between you and the chain while limbing

(A, Fig. 69). Cut from the side of the tree opposite the branch

you are cutting.

• Do not cut from a ladder, this is extremely dangerous (Fig. 68).

Leave this operation for professionals.

• Do not cut above chest height as a saw held higher is difficult

to control against kickback.

• Be alert for springback. Watch out for branches that are bent

or under pressure. Avoid being struck by the branch or the saw

when the tension in the wood fibers is released.

• Keep a clear work area. Frequently clear branches out of the

way to avoid tripping over them.

WARNING: Never climb into a tree to limb or prune.

Do not stand on ladders, platforms, a log or in any

position which can cause you to lose your balance

or control of the saw.

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Efco 147 Instruction Manual Page 27

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