Bosch AKE 40-19 PRO Notice Originale page 25

OBJ_BUCH-2379-001.book Page 25 Thursday, March 2, 2017 1:02 PM
Notching undercut: Make the notch (X – W) 1/3 the diame-
ter of the tree, perpendicular to the direction of fall. Make the
lower horizontal notching cut first. This will help to avoid
pinching either the saw chain or the guide bar when the sec-
ond notch is being made.
Felling back-cut: Make the felling back-cut (Y) at least
50 mm higher than the horizontal notching cut. Carry out the
felling back-cut parallel to the horizontal notching cut. Make
the felling back-cut so that enough wood is left to act as a
hinge. The hinge-wood keeps the tree from twisting and fall-
ing in the wrong direction. Do not cut through the hinge.
As the felling gets close to the hinge, the tree should begin to
fall. If there is any chance that the tree may not fall in the de-
sired direction or may rock back and bind the saw chain, stop
cutting before the felling back-cut is complete and use wedg-
es of wood, plastic or aluminium to open the cut and drop the
tree along the desired line of fall.
When the tree begins to fall, remove the chain saw from the
cut, stop the motor, put the chain saw down, then use the re-
treat path planned. Be alert for overhead limbs falling and
watch your footing.
Drive a wedge (Z) into the horizontal cut to make the tree fall.
When the tree begins to fall, leave the danger area via the re-
treat path planned. Be alert for overhead limbs falling and
watch your footing.
Limbing a Tree (see figure K)
Limbing is removing the branches from a fallen tree. When
limbing, leave larger lower limbs to support the log off the
Troubleshooting
The following chart lists problem symptoms, possible causes and corrective action, if your machine does not operate properly.
If these do not identify and correct the problem, contact your service agent.
 Warning: Switch off and remove plug from mains before investigating fault.
Problem Possible Cause
Chain saw fails to operate Kickback brake is activated
Plug not connected
Mains socket faulty
Extension cable damaged
Fuse faulty/blown
Chain saw operates intermit- Extension cable damaged
tently
External or internal wiring defect
On/Off switch 2 defective
Saw chain dry No oil in reservoir
Vent in oil filler cap 4 clogged
Oil passage clogged
Brake does not stop saw Kickback brake/run-down brake defective Contact your Bosch Service Centre
chain
Bosch Power Tools
ground. Remove the small limbs in one cut as illustrated in the
figure. Branches under tension should be cut from the bottom
up to avoid binding the chain saw.
Bucking a Log (see figures K–O)
Bucking is cutting a log into lengths. It is important to make
sure your footing is firm and your weight is evenly distributed
on both feet. When possible, the log should be raised and sup-
ported by the use of limbs, logs or chocks. Follow the simple
directions for easy cutting.
When the log is supported along its entire length, it is cut from
the top (overbuck).
When the log is supported on one end, cut 1/3 the diameter
from the underside (underbuck). Then make the finished cut
by overbucking to meet the first cut.
When the log is supported on both ends, cut 1/3 the diameter
from the top overbuck. Then make the finished cut by under-
bucking the lower 2/3 to meet the first cut.
When bucking on a slope, always stand on the uphill side of
the log. When "cutting through", release the cutting pressure
near the end of the cut without relaxing your grip on the chain
saw handles in order to maintain complete control. Don't let
the chain contact the ground. After completing the cut, wait
for the saw chain to stop before you move the chain saw. Al-
ways stop the chain saw motor before moving from tree to
tree.
Corrective Action
Pull activation lever for kickback brake (hand
guard) 5 back in position  (see figure F)
Connect plug
Use another socket
Check cord, replace
Replace fuse
Check cord, replace
Contact your Bosch Service Centre
Contact your Bosch Service Centre
Refill oil
Clean oil filler cap 4
Clean oil passage
English | 25
F 016 L81 137 | (2.3.17)