WORKING TECHNIQUES
WARNING! If the saw chain jams in the
! cut: deactivate the machine! Do not try to pull the machine free. If you do you may be injured by the saw chain when the machine suddenly brakes free. Use a lever to open up the cut and free the machine.
The following instructions describe how to handle the commonest situations you are likely to encounter when using a chain saw.
Cutting
WARNING! Never attempt to cut logs
! while they are in a pile or when a couple of logs are lying together. Such procedures drastically increase the risk of kickback which can result in a serious or fatal injury.
If you have a pile of logs, each log you attempt to cut should be removed from the pile, placed on a saw horse or runners and cut individually.
Remove the cut pieces from the cutting area. By leaving them in the cutting area, you increase the risk for inadvertently getting a kickback, as well as increasing the risk of losing your balance while working.
The log is lying on the ground. There is little risk of the chain jamming or the object splitting. However there is a risk that the chain will touch the ground when you finish the cut.
Cut all the way through the log from above. Avoid letting the chain touch the ground as you finish the cut. Maintain full throttle but be prepared for what might happen.
If it is possible (can you turn the log?) stop cutting about 2/3 of the way through the log.
Turn the log and finish the cut from the opposite side.
30 – English
The log is supported at one end. There is a high risk that it will split.
Start by cutting from below (about 1/3 of the way through).
Finish by cutting from above so that the two cuts meet.
The log is supported at both ends. There is a high risk
that the chain will jam.
Start by cutting from above (about 1/3 of the way through).
Finish by cutting from below so that the two cuts meet.
Tree felling technique
IMPORTANT! It takes a lot of experience to fell a tree. Inexperienced users of chain saws should not fell trees. Do not attempt any task that you feel unsure of!
Safe distance
The safe distance between a tree that is to be felled and anyone else working nearby is at least 2 1/2 tree lengths. Make sure that
Felling direction
The aim is to fell the tree in a position where you can limb and
Once you have decided which way you want the tree to fall you must judge which way the tree would fall naturally.
Several factors affect this:
•Lean of the tree
•Bend