Powerplus POW64251 CHAINSAW 2400W 400MM EN - Manual (Page 13)

POW64251
EN
Copyright © 2010 VARO P a g e | 13 www.varo.com
First an undercut notch has to be cut in the trunk of the tree to determine the direction in which
the tree is to fall. The undercut, which should have a, depth equal to about a quarter of the
diameter of the trunk, should first be sawn downwards at an angle and then horizontally
across to meet the top cut (Fig. 11).
The felling cut ③should be made slightly above the level of the bottom of the undercut. This
cut should not extend right through but should leave an uncut breakage strip ② Otherwise the
tree could fall out of control. The breakage strip should have a width of about one tenth the
diameter of the trunk.
Wedges should be driven into the felling cut in good time. Only wedges of wood, aluminium or
plastic should be used never wedges of iron or steel.
12 CLEANING AND MAINTENANCE
12.1 Re-tensioning the saw chain
When working with the chain saw, the chain expands as a result of the warming. It then
becomes slack and may slip off the guide bar.
If the saw chain is tensioned in this condition, it is very important to release the tension once
the saw work is finished, as otherwise the chain may contract so much on cooling that it will be
excessively tight.