WORKING TECHNIQUES
the saw chain is jamming, the saw may be pushed back at you.
8Unless the user resists this pushing force there is a risk that the chain saw will move so far backwards that only the kickback zone of the bar is in contact with the tree, which will lead to a kickback.
Cutting with the bottom edge of the bar, i.e. from the top of the object downwards, is known as cutting on the pull stroke. In this case the chain saw pulls itself towards the tree and the front edge of the chain saw body rests naturally on the trunk when cutting. Cutting on the pull stroke gives the operator better control over the chain saw and the position of the kickback zone.
9Follow the instructions on sharpening and maintaining your bar and chain. When you replace the bar and chain use only combinations that are recommended by us. See instructions under the headings Cutting equipment and Technical data.
Basic cutting technique
! | WARNING! Never use a chain saw by | |
holding it with one hand. A chain saw is | ||
| ||
| not safely controlled with one hand. | |
| Always have a secure, firm grip around | |
| the handles with both hands. |
General
•Always use full throttle when cutting!
•Let go of the power trigger after every cut (running the motor for too long at full power without any load, i.e.
without any resistance from the chain during cutting, can lead to serious damage to the motor).
•Cutting from above = Cutting on the pull stroke.
•Cutting from below = Cutting on the push stroke.
Cutting on the push stroke increases the risk of kickback. See instructions under the heading How to avoid kickback.
Terms
Limbing = Cutting branches off a felled tree.
Splitting = When the object you are cutting breaks off before the cut is complete.
There are five important factors you should consider before making a cut:
1Make sure the cutting equipment will not jam in the cut.
2 Make sure the object you are cutting will not split.
3Make sure the chain will not strike the ground or any other object during or after cutting.
4 Is there a risk of kickback?
5Do the conditions and surrounding terrain affect how safely you can stand and move about?
Two factors decide whether the chain will jam or the object that you are cutting will split: the first is how the object is supported before and after cutting, and the second is whether it is in tension.
In most cases you can avoid these problems by cutting in two stages; from the top and from the bottom.You need to support the object so that it will not trap the chain or split during cutting.
English – 29