Ribimex Ribiland PRTRT450 Manuel D'instructions Et D'utilisation page 34

5.3- Guard against kickback
5.4- Felling a tree
1. Decide the felling direction considering the wind, lean of the
tree, location of heavy branches, ease of completing the task
after felling and other factors.
2. While clearing the area around the tree, arrange a good
foothold and retreat path.
3. Make a notch cut one-third of the way into the tree on the
felling side.
4. Make a felling cut from the opposite side of the notch and at a level slightly higher than the bottom
of the notch
WARNING - When you fell a tree, be sure to warn neighboring workers of the danger.
5.5- Bucking and limbing
WARNING - Always ensure your foothold. Do not stand on the log.
- Be alert to the rolling over of a cut log. Especially when working on a slope,
stand on the uphill side of the log.
- Follow the instructions in "For Safe Operation" to avoid kickback of the saw.
Before starting work, check the direction of bending force inside the log to be cut.
Always finish cutting from the opposite side of the bending direction to prevent the guide bar from
being caught in the cut.
(a) A log lying on the ground
Saw down halfway, then roll the log over and cut from the opposite
side.
(b) A log hanging off the ground
In area A, saw up from the bottom one-third and finish by sawing
down from the top.
In area B, saw down from the top one-third and finish by sawing up
from the bottom.
Note: careful daily inspection should be performed before use and after a drop
or shock to identify major defects. Do not use the machine until the defects have
been repaired.
Restrict working hours to a minimum and always take rest periods.
For proper use, after each work period take a rest period (for ex take a rest for
10 minutes after a work period of 30 minutes).
- This saw is equipped with a chain brake that will stop the chain in the event of
kickback if operating properly.
You must check the chain brake operation before each usage by running the saw
at full the throttle for 1-2 seconds and pushing the front hand guard forward. The
chain should stop immediately with the engine at full speed. If the chain is slow
to stop or does not stop, replace the brake band and clutch drum before use.
- It is extremely important that the chain brake be checked for proper operation
before each use and that the chain be sharp in order to maintain the kickback
safety level of this saw. Removal of the safety devices, inadequate maintenance,
or incorrect replacement of the bar or chain may increase the risk of serious
personal injury due to kickback.
a.
b.