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Blocking
Removing sections from a standing tree
Before blocking is started have wedges (wood, plastic or
aluminum) and a heavy mallet handy. Remove loose bark,
nails, staples, and wire from the tree where the blocking cuts
are to be made.
Conventional Notch
•
notching Undercut - Cut the notch 25% of the diameter
of the tree block, perpendicular to the direction of the
fall. Make the lower horizontal notching cut first as shown
below. This will help to avoid pinching of either the saw
chain or the guide bar when the second notch cut is
being made. Consider conditions such as wind, tree lean,
slope of the ground that could effect the direction of fall.
Back Cut - Cut the back cut at the same level as the first
•
horizontal notching cut. Keep the back cut parallel to the
horizontal notching cut as shown below. Make the back
cut so approximately 10% of the tree block remains to act
as a hinge as shown below. The hinge wood keeps the
tree block from falling in the wrong direction. Do not cut
through the hinge.
•
As the felling cut gets close to the hinge the tree block
should begin to fall. If there is any chance that the tree
block may not fall in the desired direction or it may rock
back and bind the guide bar, stop cutting before the felling
cut is complete and use wedges to open the cut and drop
the tree block along the desired line of fall. When the tree
block begins to fall remove the chain saw from the cut,
release the trigger switch and activate the chain brake.
DIRECTION
OF FALL
2
NOTCH
1
25%
MAINTENANCE
WARNING: To reduce the risk of serious personal
injury, turn unit off and remove the battery pack
before making any adjustments or removing/
installing attachments or accessories. An
accidental start‑up can cause injury.
Your D
WALT power tool has been designed to operate
e
over a long period of time with a minimum of maintenance.
Continuous satisfactory operation depends upon proper tool
care and regular cleaning.
16
Cleaning
Saw Chain and Guide Bar
After every few hours of use, remove the sprocket cover,
guide bar and chain and clean thoroughly using a soft bristle
brush. Ensure oiling hole on bar is clear of debris. When
replacing dull chains with sharp chains it is good practice to
flip the chain bar from bottom to top.
Sprocket and Sprocket Cover (Fig. A, D, G)
1. Place the saw on a flat, firm surface.
2. Remove sprocket cover
3. Wearing protective gloves, use a clean, soft bristle brush
4. Rotate the chain tension screw
BACK CUT
3
5. Wearing protective gloves, grasp the saw chain and
6. Wearing protective gloves, use a clean, soft bristle brush
10%
HINGE
7. Install the chain, guide bar and sprocket cover
Removing and Installing the Sprocket
(Fig. A, Q)
WARNING: Blow dirt and dust out of all air vents with
clean, dry air at least once a week. To minimize the risk
of eye injury, always wear ANSI Z87.1 approved eye
protection when performing this procedure.
WARNING: Never use solvents or other harsh
chemicals for cleaning the non‑metallic parts of the
tool. These chemicals may weaken the plastic materials
used in these parts. Use a cloth dampened only with
water and mild soap. Never let any liquid get inside the
tool; never immerse any part of the tool into a liquid.
CAUTION: Sharp chain. Always wear protective gloves
when handling the chain. The chain is sharp and can
cut you when it is not running.
WARNING: Sharp moving chain. To prevent accidental
operation, ensure the battery is removed from the
tool is unplugged before performing the following
operations. Failure to do this could result in serious
personal injury.
13
Guide Bar and Saw Chain section.
to wipe away any saw dust, sticks, vines or other debris
that may have collected inside the sprocket cover
and around the saw chain
screwdriver end of the wrench
counterclockwise allows the guide bar
and reduces the tension on the chain so that it may
be removed.
guide bar and lift them away from the tool.
to wipe away any saw dust or other debris that may
have collected on the guide bar
chain
12
.
as described in Installing the Guide Bar and Saw
Chain, Replacing the Saw Chain sections and adjust
chain tension properly before use as described in
the Adjusting Chain Tension section.
CAUTION: Sharp chain. Always wear protective gloves
when handling the chain. The chain is sharp and can
cut you when it is not running.
as described in Installing the
13
12
or sprocket
27
.
15
using the flat
22
. Turning the screw
11
to recede
11
and around the saw
13
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