Sharpening Of The Chain Blade; Maintenance And Inspection - Hitachi CS 30Y Instrucciones De Manejo

English
○ Do not cut all the way thorough the wood by starting
from the bottom since there is the danger of the guide
bar fl ying up out of control when the cut is fi nished.
○ Always prevent the operating chain saw from touching
the ground or wire fences.
2. Branch cutting
(1) Cutting branches from a standing tree:
A thick branch should initially be cut off at a point away
from the trunk of the tree.
First cut in about one third of the way from below, and
then cut off the branch from above. Finally, cut off the
remaining portion of the branch even with the trunk of
the tree. (Fig. 18)
CAUTION
○ Always be careful to avoid falling branches.
○ Always be alert for chain saw recoil.
(2) Cutting branches from fallen trees:
First cut off branches that do not touch the ground, then
cut off those which touch the ground. When cutting
thick branches that touch the ground, fi rst cut in about
half of the way from above, then cut the branch off from
below. (Fig. 19)
CAUTION
○ When cutting off branches which touch the ground, be
careful that the guide bar does not become bound by
pressure.
○ During the fi nal cutting stage, beware of the log
suddenly rolling.
3. Log cutting
When cutting a log positioned as shown in Fig. 20, fi rst
cut in about one third of the way from below, then cut
down all the way from above. When cutting a log that
straddles a hollow as shown in Fig. 21, fi rst cut in about
two thirds of the way from above, then cut upward from
below.
CAUTION
○ Ensure the guide bar does not become bound in the log
by pressure.
○ When working on inclined ground, be sure to stand on
the uphill side of the log. If you stand on the downhill
side, the cut-off log may roll toward you.
4. Felling trees
(1) Undercut (1 as shown in Fig. 22):
Make undercut facing the direction in which you want
the tree to fall.
The depth of the undercut should be 1/3 of the tree's
diameter. Never fell trees without proper undercut.
(2) Back cut (2 as shown in Fig. 22):
Make a backcut about 5 cm above and parallel to the
horizontal undercut.
If the chain becomes entangled during cutting, stop the
saw and use wedges to free it. Do not cut thorough the
tree.
CAUTION
○ Trees should not be felled in a manner that would
endanger any person, strike any utility line or cause any
property damage.
○ Be sure to stand on the uphill side of the terrain as the
tree is likely to roll or slide downhill after it is felled.
14

SHARPENING OF THE CHAIN BLADE

CAUTION
Ensure the power source has been disconnected from
the tool before performing the steps below.
Wear gloves to protect your hands.
Dull and worn chain blades will decrease the effi ciency
of the tool and place unnecessary overload on the
motor and various parts of the machine. In order
to maintain optimum effi ciency, it is necessary to
check the chain blades often and keep them properly
sharpened and adjusted. Blade sharpening and depth
gauge adjustment should be accomplished at the
center of the guide bar, with the chain properly mounted
to the machine.
1. Blade sharpening
The accessory round fi le should be held against the
chain blade so that one-fi fth of its diameter extends
above the top of the blade, as shown in Fig. 23.
Sharpen the blades by keeping the round fi le at a 30°
angle in relation to the guide bar, as shown in Fig. 24,
ensuring that the round fi le is held straight, as shown
in Fig. 25. Ensure that all saw blades are fi led at the
same angle, or the cutting effi ciency of the tool will be
impaired. Appropriate angles for sharpening the blades
correctly are shown in Fig. 26.
Keep all cutters the same length.
2. Adjustment of depth gauge
To perform this work, please use the optional accessory
depth gauge jointer and a standard fl at fi le obtainable in
local markets. The dimension shown in Fig. 27 is called
the depth gauge. The depth gauge dictates the amount
of incision (cut-in), and must be accurately maintained.
The optimum depth gauge for this tool is 0.635 mm.
After repeated blade sharpening, the depth gauge
will be decreased. Accordingly, after every 3-4
sharpenings, place the depth gauge jointer as shown in
Fig. 28, and fi le away that portion that protrudes above
the upper plane of the depth gauge jointer.

MAINTENANCE AND INSPECTION

1. Inspecting the Chain
(1) Be sure to occasionally inspect the chain tension. If the
chain has become slack, adjust the tension as directed
in the section entitled "Adjusting the Chain Tension".
(2) When the chain blades become dull, sharpen them
as directed in the section entitled "Sharpening of the
Chain Blade".
(3) When sawing work has been completed, thoroughly oil
chain and guide bar by depressing the oil button three
or four times while the chain is rotating. This will prevent
rusting.
2. Cleaning the Guide Bar
When the guide bar groove or the oil hole becomes
clogged with sawdust, oil circulation becomes impaired,
which could result in damage to the tool. Occasionally
remove the chain cover and clean the groove and oil
hole with a length of wire, as shown in Fig. 29.
3. Cleaning the inside of side cover
Tension dial and knob operations will become sluggish
if sawdust or other foreign matter builds up inside the
side cover, and there are cases in which they will cease
to move completely. After using the chain saw and
after replacing the saw chain, etc., insert a fl at-headed
screwdriver into the gap beneath the tension dial as
shown in Fig. 30, lift up the knob and tension dial and
slowly remove the screwdriver to clean the inside of the
side cover and remove all sawdust.